What to do if the TV does not turn on. The TV does not turn on, the light is off - what to do
This article will cover the main reasons why the TV does not turn on, as well as possible troubleshooting options. In order to find out the cause of the malfunction, first of all, it is necessary to carry out a visual inspection of the equipment, perhaps the connecting cable went off in one of the sockets. And also should pay attention to other symptoms: the indicator is lit or not, whether the TV beeps, these signs will help determine the exact reason why the TV does not turn on.
Equally important is the type of television panels, as their structure is different. Today the most popular are the following types:
- cRT screens;
- plasma screens.
Breakdown may occur due to various factors, in some cases all the diodes on the TV panel are burning, including the red light, but the TV refuses to work. There are situations when when you try to turn on the device, the screen starts to buzz or squeak, and the picture and image are also missing.
LED blinks
If the TV has stopped turning on, and the indicator is flashing, this means that the technician has switched to the self-diagnostic mode, the process of determining the malfunction is in progress. If the diode lights up a certain number of times, then the problem is installed and the screen, thus, signals that it has failed. Codes that decode the damage can be found in the instruction manual. The option of self-diagnosis is available on almost all modern TVs: Philips, Supra, Samsung, Thomson, LJ. Therefore, if Phillips or Supra TV does not turn on, but the diode is on, then you need to calculate the code and decrypt it.
This is also possible if the screen serves as a PC monitor. For example, if the computer went into sleep mode or a shutdown occurred, then when you press the start key on the LCD TV, the diode will light up several times.
Diodes on the TV panel are lit continuously
In the event that the TV does not turn on, but at the same time all the diodes are lit, this means that the equipment has no problems with electric power supply. Experts recommend trying to perform the inclusion of plasma is not using the remote control, and press the control buttons on the TV panel itself. And also the fact that the remote is faulty, may indicate the fact that the TV does not turn off.
If, after applying this method, the TV still does not work, then most likely the problem is in incorrect connection or setting up the TV. You should also not forget about the individual characteristics of a particular screen. For example, if, with such symptoms, the LG TV does not turn on, then, usually, a snag in the ceramic voltage of 4.7 Km, in other words, a breakage occurred.
Instructions what to do if the problem is in ceramic voltage:
- and his contacts;
- inspection of the infrared emitter:
- check buttons.
In the event that the Samsung TV does not turn on, and the indicators are lit, then the breakdown should be sought in the electronic filling.
Protective functions
This is one of the common reasons why the TV does not show. The screen may even turn on for a few seconds, but then it turns off. This basically happens due to a voltage outage. Experts recommend disconnecting the equipment from electricity for a while, and then turn it back on.
If the problem occurs constantly, then in such cases the TV should be turned off and on, through a surge protector.
Human factor
Very often, equipment fails precisely for this reason. Therefore, before connecting the equipment, it is imperative to familiarize yourself with the instruction, which details how to configure, install the screen.
And also all components must be in good quality (wires, sockets). Knowledge of the basic rules of operation will help to avoid many problems.
The screen makes strange sounds
Often, users, including TV, hear that sounds are heard in the monitor, they can be different.
The most common are the following symptoms:
- the TV clicks and does not turn on, while the red indicator flashes;
- the diode is off, and a click sounds in the device;
- there is a squeak, but the TV does not show.
The reasons why this happens a few, are considered the main ones:
- equipment locking system is activated;
- power supply is overloaded;
- heated, then began to cool the plastic body of the plasma.
These are the common and most likely factors why TV does not show. Below are examples of why a particular manufacturer’s television does not work.
Causes of failure
The main causes of failure may also depend on the TV model.
Ruby
If TV Ruby does not start with the start button, then possible problems may be:
- Breakdown of power supply unit TV RUBY.
- If the Ruby screen does not start from the standby mode, then the microchip is most likely out of order.
- The device "Hushes" - the capacitor broke.
These are the main reasons why the manufacturer Rubin’s equipment may cease to function.
Tv horizon
In new models, this often happens because of a failed transformer, usually failures occur in the second year of operation. In this you need to make a replacement part, the approximate cost of which is 700 rubles, and the screen will work again. The emergence of such a problem is possible on TV Vityaz.
Sony TV
If the screen does not respond to the remote control commands, and when turned on from the panel, it turns off after a few seconds, this indicates that it is necessary to replace device power adapter .
Toshiba TV
In Toshiba plasma panels, often the problem lies in the failure of the power board. And also possibly flashed the firmware, it happens on the monitors of other companies, for example, TVs Samsung, Thompson, Bravia, Daewoo, Mystery.
Philips
Philips TV does not turn on mainly due to the automatic locking that occurred. Such a problem Phillips is easy to fix on their own, contacting the service is optional.
The auto-lock option is available on most modern monitors, so this can happen on many devices, including the BBK TV.
Sharp
Sharp screens have several main reasons why they refuse to function.
- Sharp TV has dried condenser filter.
- The Sharp screen has a broken line transistor, which can be indicated by constant clicks of the device.
- At Sharp, one of the chips failed.
Supra
Supra TV may not work due to the following problems:
- processor failed;
- defective flash memory;
- firmware replacement required.
This is basic information why TVs from different manufacturers may not turn on. As a rule, many problems are quickly solved and do not require serious financial costs.
DETECTION OF NON-QUALITY SHOULDERS IN DIGITAL SCHEMES. Poor soldering is responsible for 50% of BREA defects. Contact failure during poor soldering is detected by tapping. In analog circuits, this leads to the appearance of pulses on the TV screen. In digital circuits with an ADC (for example, AIWA, S ONY, TOSHIBA), contact disturbance when tapping causes an impulse that brings the circuit to the next steady state. Further tapping does not cause any influence on the pattern. This is a feature of digital circuits and greatly complicates the search for a defect. Most often, poor soldering occurs when double-sided mounting on the jumpers. Therefore, it is proposed to check carefully lift them with a narrow screwdriver. This can lead, with poor soldering, to complete loss of contact, which is already easy to determine.
Toshiba 15CSZ2R (TMP 8801CPCNG4UD7). The TV turns on but does not react to pressing the buttons on the remote, or on the panel, the voltage B + when turning on the TV for a few seconds is +115 V, and then decreases to 78 V. After replacing the controller of the power supply STR-W5753A, the fault persists. And as it turned out later there was a leak Zener diode D818 DZ13BSC
Toshiba 15LZR17 processor 8891CPBNG6JC0. A few minutes after switching on, the vertical size starts to pulsate. Replaced the controller STR-W5753A helped, but after 2 months the telly was brought back for repair with a similar problem. I noticed that if you cool the radiator with a STR-W5753A controller, the image is restored, but not for long. So as not to change the STR-W5753A installed instead of SMD capacitor C880 (0.01 μF) film capacitor 0.047 μF x 50 V and installation between the “ground” (GND) and the pin. 5 vyv. STR-W5753A (VСС) Zener diode 36 V / 1 W (DZ36V0), similar to the service bulletin for the SCG-1316A-H2 chassis (model "JVC AV-21LMT3"). The included pulsations appeared after 30-45 seconds, and then disappear. Replaced the seemingly problematic C864 (220 μF x 50 V) with 47 μF x 50 V and the fault completely disappeared.
Toshiba 21CVZ3R 8807CPBNG4JF processor. TV only goes into operating mode and immediately returns to the duty. It turned out out of order the AN5522 chip. Replaced it and checked it in a pulse power supply. In standby mode, the voltage B + 70 V, when transferred to the worker, it first rises, and then drops to 70 V. Disconnected line scan TV turns on, turned out to be broken through TDX FMX21A001 (TFB4159AS).
Toshiba 2812DS. Does not turn on. CG, on the lowercase nutrition. Breakdown of the collector winding inline transformer on the case. Brand TDKS-AT2078 / 25.
Several TVs with very similar malfunctions were repaired, although all TVs are completely different in terms of the element base, but the approach to troubleshooting all turned out to be exactly the same, so that a certain similarity to the method was formed. The symptom of all is one — the lack of a frame scan — can manifest itself in different ways, depending on how the scheme is implemented: GRUNDIG GR1450 TV (Chinese fake, something like RECOR) —TDA3653B and TDA8362- on the horizontal line is slightly off, TV TOSHIBA 218D7S (TA8403, TA8659) is a dark screen, when turned off you can see the same "thread". There was another old one, I don’t remember the names on TA7698 - it’s also a dark screen, the lack of personnel is noticeable when the screen is increased on TDX. With the seeming simplicity of the situation, the repair took away a lot of time at first (due to the fact that someone had already “raped” these TV sets well, but they did not find the reason and abandoned it). Naturally, the personnel and sync processors changed. So I had a tedious testing of the strapping .... The following pattern emerged: the synchroprocessors participate in the personnel sweep with 3 legs (I don’t count the power) - the output of the saw generator, the output of the trigger pulses to the personnel, and the feedback signal from the personnel to synchro processor. There was a saw at all, there were no trigger pulses, the feedback voltage was too low. I unsolder this pin from the circuit, the sweep does not appear, but if you touch the sealed pin with a multimeter probe, or simply with tweezers, the "thread" briefly expands by 3-5 cm, and trigger pulses appear. In all cases, the feedback from the output stage to the synchro processor (cracked resistors or tracks) was cut off, which required meticulously creeping along the board, ringing up the installation and resistance. By the way, when working with the TDA8362 I used articles in the magazine "Radio" with a detailed description of this chip, so the implementation of the circuit in GRUNDIG does not match the conclusions from the journal, there was no TV circuit, I lost a lot of time on it. The log shows the correspondence of the findings: 44-launch KR, 43-saw generator, 42-obr.svyaz, and in fact in the TV: 43,42,41, respectively.
TVs "Toshiba 1465XR" (Dramatic - V) () Tuner combined with RF. The board is divorced in it using screen partitions as a mass. Since massive conclusions are not subjected to manual manual soldering for the sake of economy, then non-fucking occurs with time. There is a defect like this: - either at the first moment everything is normal, and then all the channels disappear (and "Blue Screen), - or, on the contrary, at the beginning of the noise, then the picture" creeps ", as if the APCG circuit is poorly tuned or the tuning voltage floats, - it happened that everything is normal, but the sound is hoarse on one channel, since it is not possible to visually detect specific non-contacts, it is necessary to solder all the conclusions from the screen.
Toshiba TV 2140 TS Defect: no general synchronization. It seems that the video processor TDA8362 out of order. The reason: due to the strong heating, ring cracks occur around Q861 - stabilizer 5B. I think that in these TVs this defect will occur as well as in Funai.
TVs "Toshiba 21D3XRT" (Quatra Bomba with a flat pipe), chassis MCL - 437F. When turned on, a high-voltage rustling is heard, after which the high is removed, + B = 69 V (standby mode), the indicator “nervously” flashes (without pattern). The client said that he degraded gradually, i.e. turned on worse and worse. TV is only 1 year old. I checked the non-contacts in the tuner (it is with a "square" bus) and the personnel chip - it’s not about them. The TV is probably filled with an extensive sensor system for the presence of currents / voltages. Recalling these bells and whistles in Funai "e MK10, I traced the power circuit of the personnel chip (TA8403K). Indeed, from a resistor-shunt in the power supply circuit (current sensor) the voltage is applied to the transition B-E of the emergency transistor Q340 2SA1266. The capacitance C341 100mkF is connected in parallel to the transition * 16V to eliminate false positives of protection at inrush current. This capacity shrank to almost zero, protection immediately worked when the power was turned on. This is a year of operation in an advanced TV! There is nothing heating nearby, there is no obvious depressurization. To. Here it is the result of total whaling! In general, the TV makes a depressing impression. The payment is gigantic due to the complete absence of CHIP - elements. The radiators are smeared with thermal paste. Several glass fuses are used inside. The huge and curved board of the kinescope (Rubin rests). Antediluvian personnel chip. Everything is very reminiscent of the new Alexander Records. The picture is certainly cool (the contrast is extreme), but the focus (!) is blurred, and the clarity is not the best. Flat kinescope - Thailand.
Toshiba 1450XS - no reception, noise on the screen, as with the antenna turned off. At low frequency, everything works OK. In this model, there is an expensive digital tuner combined with an intermediate frequency amplifier. The problem in the chip CXA1664M - 16 conclusions (planar) manufactured by SONY. Power 9V is fed to the 11 pin. Inside the chip, there is a 6V stabilizer with output to pin 6. Instead of 6V, it had 1.5V. Before changing a microcircuit try to throw a jumper from the 5V power supply to this pin - it comes to the tuner. After such a repair, no deterioration in reception quality was noticed. TV is working properly for six months.
Toshiba model 2805 DD Fault: vertical frame size of about 60%, distorted image. I checked the input and output personnel signals on the TDA8170 and it turned out that they have some kind of moire pattern mixed in with the main signal. Naturally, the output signal of the frame m \\ x output signal had an irregular shape of the saw and also with a moire. After much experimentation with capacitors in the trim m / x, I had to replace the C372 2.2x50v, and the C317 2.2x50v and everything became normal.
TOSHIBA 218 D7S.
1) The operating mode does not turn on. The reason is the breakdown of a high-voltage capacitor soldered parallel to the K-E of the output horizontal tr-ra. Typical fault.
2) The operating mode is activated randomly. Responds to bending. The reason is that the soldering of the connector M002A
3) Distortion frame. Reason - C317
4) OX lines are visible. The reason is C325.
TOSHIBA (simple models, release mid-90s) There is no signal from the antenna. Noises can be or not. From the input video signal passes. 2 typical reasons: the BA7356S (UPCHI) microcircuit in the EC931X1 tuner is faulty soldered connections around the microcircuit (it gets very hot).
TOSHIBA 218D7S1 nonlinearity in the vertical = C317 1µF
TOSHIBA - 2150XNE. The screen is filled with white color with reverse lines. The adjustment "SCREEN" managed to reduce the brightness, LOH disappeared and a black and white image appeared. With saturated pictures (advertisements) sluggish colors appear. Checking the supply voltages, replacing the / processor did not result. When checking details on the kinescope board a faulty Q980 transistor was detected (breakage of a bk transition). After replacing the transistor the defect disappeared.
TOSHIBA - 218D7S. On the screen - a narrow horizontal bar, the sound is. Replacing the m / schema AN5515 did not give a result. Upon further diagnostics, it was found that there is no 12v supply voltage on 6 and 61 pins of the TA5689AN video processor due to the breakdown of the D408 diode and the break of the R448 resistor. After replacing these parts, the TV works fine.
TOSHIBA 2150XS. No reception, at the input of the low-pass AV input works fine. The diagnosis is a faulty tuner. Such a tuner is not easy to get, so you have to repair it. We are changing CXA1664 (CXA1665 is also suitable, this is its mirror copy. Only we need to turn it in. We also change BA7356. No adjustments were needed. Then it turned out that there was lightning in the antenna. Not a hot secret, but a man of 2.5 years could not find even a trace This tuner. Maybe someone like this will happen ... then only the repair of the tuner, or your TV remains a monitor for your video.
Toshiba 21CS2RU with 8801CPCNG5HE5 processor on S2E chassis. When switching from standby mode to work mode, there is no image. If you call up the user menu, it is barely visible at the same time, the raster is narrowed vertically, and if you start auto search, there are no channels.
The cause of the breakdown is the EEPROM firmware upgrade. To fix the problem, it is enough to install a “clean” microcircuit to turn on the TV with the network button and after initialization, within 10–15 seconds, put the TV into working mode.
FAULT: After turning on the TV there is no synchronization in rows. It can manifest itself in the form of a complete lack of synchronization, or the image slowly moves to one or the other. REPAIR: After the horizontal scan has been diagnosed, no signs of failure have been found for the latter, with the exception of some heating of TB1231N, about 75 ... 80 degrees. The device was handed over for repairs at ELECAM SERVICE. Six months later, returned in the same form + there is no sound. I took it myself. After a long and hard work of finding complete information on this unit, I found the reason simple to the point of absurdity. One had only to enter the service and make a correction in the preset codes. However, only restored synchronization !. With sound (see?). After checking the SIF signal circuits and the mode of operation of the TC4052BP chip, I came to the conclusion that the latter is faulty (see?). The conclusion turned out to be true, after replacing this chip, the sound path and the switching of TV modes were restored.
TOSHIBA-2140RS Image and sound are normal, there is no OSD display. Defect: open circuit LA01, which is connected to pins 28, 29 of the microprocessor M37211M2-581SP.
Toshiba 320P8SV. The top is very stretched and the bottom is tightened. The reason is the loss of capacity 2.2 microfarads. The capacitor is located in the feedback loop of the vertical sweep generator (30k TA8659AN)
TOSHIBA 21N3XM after a long sludge, it turns on normally, but after five minutes, when you try to turn off and turn on a slightly narrowed frame and white raster. The memory was good. Reason 78LR05, 4 pin (reset) 2,6v. Solder a 330 ohm resistor between the 5 pin (output + 5v) and 4, the reset voltage rose to 4.8v. The processor began to turn on the TV correctly.
Toshiba 2065XR. EU tuner 933, combined with a radio channel.
Setting goes away, when tapping the tuner can work normally. Power BA7358S 18 Vyv floats from 6.6v (normal) to 4v. By reducing it to 4.7 in the radio channel is blocked (blue screen). The reason is non-contact of chip resistors in the BA7358S power circuit (2 by 270 ohms in parallel and 1 per 100 ohm in series). The power is taken from channel 9b and after 3 resistors is extinguished to 6.6b. All remove them, solder contact pads under them and set in place.
Periodic loss of sound. It hisses like a wrong choice of system. Also eliminated by tapping the tuner. On the BA7358S 15 input, the switching voltage (2.4 V -DK, 4.3 V-BG) floats. As it increases, the sound disappears, the noise remains. The reason is also in the resistor chip (000) connected to the 15 pin of the BA7358S. Confused that when measured, the voltage at both ends of the resistor changed equally.
TOSHIBA-2150 Blown fuse ZP5. Check the D875 and STR-Z2152 by dialing between the 14th and 15th pins. If after replacing the STR-ki BP shakes, check (replace) S1854
TOSHIBA 14N1XRS TV does not turn on flashing LED - replace Q883. S1854A (SE115)
Toshiba 1478XR if I'm not mistaken. The sound periodically disappears - to disappear the video processor
TOSHIBA 218D7S1 raster stretched at the top (bottom compressed) = С317 1.0 / 50в
TOSHIBA 218D7S1 TV starts, on the screen a horizontal band of 5-8cm, which begins to expand with warming, TDKS beeps, there is a breakdown of the horizontal frequency, we check the power supply of 12v on 6 and 61 of the TA5689AN video processor output (equal to 8 volts), check B + equals 80b instead of 120V, off TV to ring in the optocoupler К-Э (it was equal to 1.5 ОМ) Q806 was pierced.
Toshiba 28N13D2 shass 11AK37-1 no start, visually detected burned R639 10k (line transistor area), further along the same chain (LFB) breakdown (short circuit) D407 1N4148 and break R426 2k2 (smd) pin-49 STV2247H, replace all the above STV and replace it all C653 473 / 250v he was the culprit (standing next to the R639) To check the performance of the power supply unit, you can drop L801 B +, start from the remote control (mak code 1010 to start) or the P + button on the TV, also the TV starts with the memory dropped.
Toshiba 21A3TR The TV does not turn on in working mode, the indicator often blinks: replacing the personnel chip TA 8403K (short circuit between 1 and 2 legs).
Toshiba 50CV9UR Malfunction: there is no horizontal synchronization, the frame is preloaded, the image appears with warming, but instead of red it may be blue and vice versa, it breaks the lines, etc. The reason is that TC90A85AF pins 157–200 m / s in the module MDF303. Heat this row with a soldering station.
TOSHIBA 14CS2R. Fault: the setting disappears, it can stop on any of the channels, and when switching, the indication is real, and the channel remains the one on which<завис> television. The reason for the throttle on the SDA bus (tuner) - non-periodically constructively can close to ground (a constructive feature of the board).
TOBISHI 1435XS Fault: inversion on top. Replacing the C304 4.7x160V, C307 10.0x50V, C337 0.22x50V.
Toshiba 218D7S Fault: not included (line scan does not start). Break C444 560pfH2kV
Toshiba 258X9S. Fault: Inversion of the raster from below about 5 cm., Lack of frame synchronization. With warming up, synchronization is restored, but the inversion remains. I did not find the TV schemes in any album, I found more or less similar from Toshiba 218X8M. The first suspicion of S317 2.2 microfarad 50 V, in personnel strapping, was not justified. After a brief search, the reason came to light: S303 1.0x50B, in the binding TA8659N, with its replacement the picture was restored.
Toshiba Bomba 21CSZ3R Malfunction: there is no picture, there is a raster, but it is slightly compressed from above. From the AV input signal passes, service information is. Corrupted memory chip firmware. The fault can be fixed in a simple way: by altering the memory chip on the programmer. In the absence of a programmer, you can try the following option: go to the service mode (press MUTE, then press MUTE again and hold down MENU on the front panel of the TV). Further, the options set the values MTS-0, HOTEL-0, POSITION-1, APRO-0, FM-0, ON TIMER-1, VIDEO-0, LANGUAGE-1, MFLG1-0, MFLG2-0, MFLG3-0, MFLG4-0. After we enter the edit point of the raster and correct the geometry. If the values are not set, replace the 24C32 memory with a new one and repeat the same.
Toshiba 1400RS, Fault: severe distortion of the size of a frame sweep, compressed raster from the bottom to the middle, and the top is strongly unfolded. Replacing the chip AN5515-cadre, the results did not give. It turned out: two electrolytes С303, С317 2.2 micron of the master oscillator of the frame sweep near the video processor TA8659AN dried out.
Toshiba 2150XS. Malfunction: reception on meter channels disappears, all channels can disappear. It can work steadily for a long time. Tuner combined with a radio channel. When tapping the tuner, the defect appears. Carefully inspecting the soldering of the partitions found defective soldering (darkened path around the soldering). Sealing the septum eliminated the malfunction.
TOSHIBA 29AX9UM and all similar models, where the unfortunate module MDFS01 is located Fault: after switching on everything works fine for just a few minutes, then thin green horizontal stripes appear in the image as clutter, clogging the image itself, then they can disappear for a while, so no end , while the OSD is normal, the sound is also, when you knock on the module MDFS01, they disappear for a while. Accordingly, somewhere there is a bad contact in it, propaya large processor and eliminated the damage, even in it it is recommended to immediately change the Q431 stabilizer + 5v. on KREN5A, also a weak spot in this module.
TOSHIBA 21CS2. Fault: after some time (10-30 minutes) the image starts to twitch, and the TV goes into standby mode. The microcircuit in the power supply unit overheats. The reason - poorly glued core TPI. The lower half falls on the board, a gap is formed, somewhere from 1mm. There were three cases. Treatment - wedges from PCB are carefully clogged, between the board and the core.
Toshiba 289X4MT. Fault: Vertical Nonlinearity. Check and, if necessary, replace C308 2.2х50V (installed on the side of printed conductors). Fault: white horizontal bar on the image. Check and, if necessary, replace C317 3.3x50V.
Toshiba 21CSZ2R1X Fault: it works for 2-3 minutes and turns off. The reason was in TPI, after replacing everything is fine.
Toshiba 21CS1R1X Fault: when turned on, a vertical bar appears and the TV turns off. The reason in the С442 capacity is 0.47x250V, when measured it shows only about 30 pf ...
TOSHIBA 14N1XRS Fault: everything is working fine. “Glitch” appears when you start working with the setup menu, only when you enter the menu from the remote control in the TV settings on the channels in manual mode, the TV turns off for a second and works in normal mode again, so it turns out that you cannot adjust the channels in manual mode . Flashing the memory solved this problem.
TOSHIBA 1400RD. Fault: narrow horizontal bar. The power of the frame sweep is normal, the AN5515 harness is the norm. M / s AN5515 is OK (verified by replacement method), video processor TA8659AN is OK. The problem is in the breakage of a 39K resistor on the 31 foot of the video processor TA8659AN.
TOSHIBA 1450XS3. Fault: brightness changes spontaneously, accelerating voltage floats. Replacing TDKS, instead of the native TOSHIBA TFB4122, you can put the SAMSUNG FSB-14B001 - they are analogs.
TOSHIBA 258Х9S Fault: no vertical scan. Change IC303-AN5521; IC501-TA8659AN - did not help. Reason: faulty C317 2.2х50v stands near the personnel chip, C303 1.0х50в stands near the processor TA8659AN, connected to the 31 leg.
The TV does not turn on, the honey is on. Quite a frequent failure. The causes of this fault are quite a few, so let's look at the main ones. The technique is not suitable for USTC type TVs, for example, but for modern models and not for everyone, everything depends on the circuit design.
Consider the example of a TV Akira CT 29SK9AE chassis 5P60.
If the indicator light is on, and the TV does not turn on, it in most cases means that the TV’s power supply is working, and the protection is triggered and the fault is in the secondary circuits, the processor, or the line transistor is faulty. This conclusion follows from the fact that the power of the light bulb (LED, LED) comes from the processor (via Standby wire or a separate output) 0 - + 5V. The processor is powered from the power supply in standby mode, since the power supply in standby mode does not turn off completely.
Consider the scheme of the power supply chassis 5P60.
Secondary 5P60 chassis chains
The protection can be triggered by a short circuit in the secondary circuits, primarily in the horizontal power supply circuit, so we check D605, C616, C631, IC103 and IC602. Next, we check the circuit elements +12 V and +15 V.
In the horizontal scan, we first check the key elements along the + 138 V circuit,
5p60 line scan node
this is Q301, D301, D302, C326, Q304 and the power of the frame sweep D309, D319, C315, C317, C318, and there is a closure of the winding TDKS.
And at the end of the TV does not turn on, and the indicator is lit when there is a malfunction associated with the processor or control.
TV status indicator
This shows that the LED control of the LED indicator goes on the Standby wire, opening and closing the Q211 transistor. If it closes the TV will not turn on. Check out the photodetector LED001.
You should not immediately change the processor, carefully check all the voltages coming to it, whether there is a decrease in voltage and whether they come at all.
Do you habitually press the remote control button, but the Toshiba TV does not turn on? The indicator is on, but nothing happens on the screen - it is dark. Do not panic, because any malfunction can be eliminated. But first you need to deal with its causes.
There may be several reasons - the amount of repair and its cost directly depend on them. Specialists of our service center will be able to call them only after a full diagnosis, after which they will orient you in terms of time and cost of repairs.
Consider the reasons that most often found in practice.
Wrong connection
If the new Toshiba TV that you just purchased does not turn on, most likely the reason is not in it. Manufacturers before sending the equipment to distributors check it for serviceability, therefore the probability of manufacturing faults is minimal.
With a high probability there is no breakage - there is a fact of incorrect connection. Open the instructions and follow the recommendations outlined in it. Pay attention to the TV's power button - you may have forgotten to turn it on.
A glowing light indicates that the power supply is normal. But it is possible that problems with voltage in the outlet.
The indicator often blinks
The second common problem is when the Toshiba TV does not turn on, the indicator flashes intermittently. One of the reasons for the malfunction is that contacts are coming off or a light bulb needs replacing.
Such repair specialist service center often does at home with the client - it takes about an hour or a little longer.
If everything is fine with contacts and a light bulb, you need to look for other problems.
Incorrect mode selected
A lit indicator indicates that everything is OK with the power of the TV. And the image on the screen does not play, because you have chosen the wrong mode.
Modern TV is more like multi-functional multimedia centers that operate in different modes - on duty, FM radio, as a game console, as a DVD player, Smart, and others.
The mode is selected from the control panel through the “Menu” tab. Open the instruction, enter the menu and check the current state of the TV. He may be in sleep mode. In this case, the indicator on the panel will turn green or red, and the screen will not turn on.
A similar situation will occur when the TV is switched to DVD mode or a game console - the indicator lights up and the screen does not respond when the player or console is not connected.
technical issues
Sometimes the reason lies in the remote control. You can check its health by pressing the power button. The indicator on the TV lights up - the remote control is working. There was no response to your signal - perhaps the batteries are exhausted or it is time to replace the remote.
Try to turn on the TV with a button on it - an image will appear, hence the problem in the remote control.
Often with technical faults, the user hears a squeak or unusual clicks - they may indicate a breakdown inside the case. One of them is a problem with the lock module built into the TV. When activated, it makes clicks.
It is impossible to eliminate the problem yourself - it is better to contact the service center.
Diagnostics and repair
You can call a specialist from our service center by phone - he leaves within one hour from the moment the application is received.
To establish the exact cause of the malfunction is possible only after the diagnosis - we carry it out for free.
Minor repair of TVs is carried out at the customer's home, we repair more serious faults in the service center, where we deliver your equipment on our own.
For all types of repairs performed by our specialists, 1 year extended warranty.
