Laptop asus does not turn on. Indicators on the laptop are off
In some cases, it turns out that, although the power light is on, the laptop does not turn on. Why does this situation arise? What do you need to pay special attention to? What may be needed to correct this situation? Understanding all the questions that arise is actually not as easy as it might seem at first glance. A personal computer is a rather unpredictable hardware. Power failure problems can be the result of many failures. Some users rush to go to the service centers. This is not recommended. First, it is desirable to independently diagnose the problem. Perhaps cope with the situation without assistance.
Video card
The laptop does not turn on, although the power light is on? There are various reasons for this phenomenon. The first thing you might think is the problems that arise when the video card is working. In the case of a stationary PC, you can simply detect and correct such a failure. To do this, just remove this component and connect it to another machine. But in the case of laptops, the user will have to try. If you suspect a malfunction or breakdown of the video card, it is recommended to contact the service centers for help or call your system administrator for help. You can not even try to diagnose the problem yourself. The laptop usually turns on by itself - you can hear the work of the cooler. But there is no picture on the screen. Sometimes you can even hear the operating system boot up.
Screen fault
If the power light is on, and the laptop does not turn on and the problem with the video card is eliminated, then the device may have a damaged or broken monitor. This is an extremely rare phenomenon, which sometimes takes place in practice. If the display is broken, then the reasons for the breakdown are likely to be the same as in the case of the video card. The image on the monitor will not, but the sound of the OS will appear. Independently deal with this problem will not work. The only option is to buy a new laptop. You can try to contact in such circumstances the service center. Perhaps there will be able to repair the display. Usually after such a repair device does not work for a long time. In the end, you still have to replace the laptop with a new one.
The next possible situation can be corrected without assistance. What should I do if the power light is on, but the laptop still does not turn on? The main causes of this phenomenon is a failure or reset. BIOS settings may be lost. It is for this reason that the problem in question could arise on a laptop. In this situation, it is recommended to reset the BIOS. The computer should then work at full strength.
Lack of components
What else could have caused this problem? If we are talking about a new laptop that worked before, then we should not exclude the absence of any components. If the notebook itself turns on, but nothing is displayed on the screen, and the NumLock and CapsLock buttons are not extinguished, then the BIOS may initialize. Probably, the laptop does not have RAM or a processor. If we are talking about a device that previously operated, the reason may be hiding in the breakdown of the above components.
HDD
In some cases it happens that despite the power indicator on, the laptop still does not turn on, although it used to work normally. The cause of the failure is the hard disk. To the computer refused to start just one small failure. In this case, the power button will still be lit. You can also notice the fan in normal mode. At the same time, the NumLock buttons and others light up and go out as expected. It is recommended to disassemble the laptop and disconnect the hard drive. Now try switching on in this state. It did not help? Then you can try again gently attach this component. If the problem was a failure, then it should disappear.
Battery
What should I do if the power light is on, but the laptop still does not turn on? Diagnosing a problem in this case will require some knowledge from the user. Do not rush to give the computer to repair. It should be borne in mind that most of these problems are usually solved with the help of a professional. You can solve the situation yourself, if the problem is in the battery. She, quite possibly, simply discharged. Then it will be enough just to connect the power to the network and the computer and try again to turn on the devices. Before pressing the power button of the laptop, it is better to wait a few minutes. This will allow the battery to get some charge. This technique is quite effective. Some experts also recommend removing the battery completely from the laptop and then connecting the power cord to it. After that, you must turn on the computer and monitor the situation. If the computer is working at full strength, then nothing more needs to be done. Otherwise, the source of the problem will have to be solved elsewhere. Practice shows that a discharged laptop or battery problems are quite common. These problems are resolved quite easily and without help.
Closures
What should I do if the Samsung laptop does not turn on? At the same time, the power indicator is on and the cooler is working. The following reason is quite rare. It is almost impossible to diagnose it yourself. This problem may appear if a laptop is damaged in the south or north bridge. Why does this situation arise? Bridge problems can be caused by various causes, for example, through a short circuit caused by temperature changes. If the USB port is damaged on the laptop because of this, then the appearance of the problem being studied is quite likely. The method of correcting this problem in this case will be the only one - the repair of damaged components. Buying a new PC will be the most effective way to solve this problem. Repaired components in laptops are unlikely to work for a long time. Here, every user will have to independently decide what to do.
Viruses
If the laptop refuses to turn on, but the device has previously functioned for a while, then you should think about the effects of viruses on the device. Often computer infection leads to the fact that the computer simply ceases to function in normal mode. In some cases, it comes to BIOS virus corruption. In this case, there may be problems associated with the inclusion of a laptop. Troubleshoot yourself is unlikely to succeed. As in most of the cases mentioned earlier, it would be best to immediately take the computer to the service center. Here you will be helped to get the laptop back to work and cure it of viruses. This scenario, fortunately, is quite rare. However, do not exclude it, especially in cases where the user himself admits the presence of viruses on the computer. In some cases, problems associated with the inclusion of a laptop arise after the treatment of the OS. In this case, it will be enough to first reinstall the BIOS, and then the operating system. After that, no problems will bother you.
Conclusion
Let's summarize the preliminary results. For a start, it is worth noting that in most cases, diagnostics and troubleshooting are reduced to calls to a service center. Most often, this is exactly what many people do. After all, a laptop is a rather complicated device. Repairing it yourself is actually not as easy as a desktop computer. If you can not figure out for yourself why the computer does not turn on, then you can immediately contact a specialized service center for help. If there is a suspicion of a specific problem, it is necessary to report it to the service center staff.
There are a number of reasons why a computer may not boot, or the Windows operating system may not start. If the computer does not start or the operating system does not start, then the cause of the problem can be determined approximately by external signs or sound signals. If you are unsure of the cause of the problem, read HP Notebook PCs - Review of Troubleshooting Procedures for Launching or Booting Your Computer.
If no light is on, no power is supplied to the computer.
When the AC adapter is connected, the indicator light next to the power icon lights up (on many computers it appears as a stylized image of a lightning bolt). This indicates that the battery is being charged. Information about the exact location of the lights can be found in the User Guide. Each laptop model has individual power requirements. If the AC adapter does not provide enough power, or if the plug does not plug into the connector properly, the computer will malfunction.
If the lights are on, but the computer does not start up either from the AC adapter or from the battery, read the document Troubleshooting, which is indicated by the absence of error messages on the black screen during the system startup or boot process.
Wherein. Why it happens? What should I look for? What may be needed in order to correct the situation? Understanding the questions posed is not as easy as it sounds. After all, a computer is unpredictable equipment. Problems, especially when turned on, can be the result of many failures. Some immediately sent to service centers. Doing so is not recommended. It is advisable to first try to diagnose the problem yourself. Perhaps, it will be possible to cope with a situation without assistance.
Video card
Is the power light on, is the laptop not turning on? The causes of this phenomenon are different. The first thing you might think is a problem with the video card. In the case of a stationary computer, it is easy to detect and correct a breakdown or failure - simply remove this component and connect it to another machine.
But in the case of laptops have to try. It is recommended that if you suspect a breakdown or malfunction of the video card, contact the service centers for help. Or call any system administrator. Independently, you can also try to diagnose the problem. Usually the laptop itself turns on - you can hear the work of the cooler. But at the same time there is no picture on the screen. Sometimes you can even hear the loading of the operating system.
Screen fault
What's next? The power indicator is on, the laptop does not turn on, but can I exclude it? It is likely that the device is broken or damaged monitor. Extremely rare phenomenon, which in practice still takes place.
If the display is broken, then, most likely, the "symptoms" of failure will be exactly the same as in the case of the video card. There will be no image on the monitor, but the sound of switching on the operating system will appear. 
Independently solve this problem will not work. If only through the acquisition of a new laptop. In such circumstances, you can contact the service center. Maybe the display will be able to repair. But usually devices after such a repair do not work for a long time. In the end, you still have to replace the laptop with a new one.
"Bios"
The following situation can be corrected without help. Is the power light on, is the laptop not turning on? The main reasons for this phenomenon are either a failure or a reset.
It is likely that the BIOS settings are lost. Because of this, the problem under study arose on the laptop. In this situation, it is recommended to completely reset the BIOS. After that, the computer should work in full force. 
Lack of components
What else could be the result of the problem? If we are talking about a new laptop that did not work before, do not exclude the absence of any components. If the machine itself turns on, but nothing is displayed on the screen, the CapsLock and NumLock buttons do not go out, most likely, the BIOS does not initialize.
It is likely that the laptop does not have a processor or RAM. Or, when it comes to a previously functioning device, the reason may lie in the failure of the listed components.
HDD
Sometimes it happens that although the power indicator is on, the laptop does not turn on, but earlier it worked normally, the hard disk becomes the cause of the problem. A small glitch - and the computer will refuse to start. But at the same time the power button will be lit. You can also notice the fan in normal mode. Buttons "Nam Lock" and others at the same time light up and go out as expected.
It is recommended to disassemble the laptop and disconnect the hard drive. In this state, try again to turn on the device. Did not help? Then you can again neatly attach the component. If the problem was a failure, now it will disappear.
Battery
Is the power light on, is the laptop not turning on? Diagnosing an incident requires some knowledge from the user. Yes, you should not immediately give the computer to repair. But it should be noted that most problems are usually solved with the help of a professional. 
You can resolve the situation yourself if, for example, the problem lies in the battery. It is likely that it is discharged. Then it is enough to connect the power (wire) to the network and to the machine. Next, try again to turn on the device. It is better to wait a few minutes before pressing the power button of the laptop. Let the battery get a little charge. This technique is quite effective.
Some recommend removing the battery from the laptop completely, then connect the power cord. Then turn on the computer and look at the situation. If the machine is working at full capacity, then nothing more needs to be done. Otherwise, you will have to look for the source of the problem elsewhere.
As practice shows, battery failures or a discharged laptop are frequent occurrences. Perhaps the safest and most easily removable without help.
Closures
Samsung laptop does not turn on? Does the power indicator light up, does the cooler work? The next scenario is one of the rarest. And it is almost impossible to diagnose it yourself. 
The problem being studied can appear if the south or north bridge is damaged in a laptop. Why is this so? Bridge problems are caused by different methods. For example, through closures due to temperature differences. If a laptop is damaged due to this, say, a USB port, it is likely that the problem being studied will appear.
The only method of struggle is the repair of damaged components. The most effective way is to buy a new computer. Indeed, on laptops rarely repaired components work for a long time afterwards. Here each user independently decides how to act.
Viruses
If the laptop does not turn on (the power indicator is on) after the device has been running for some time, you should consider influencing the machine of viruses. Computer infection often leads to the fact that the computer stops working in normal mode. Sometimes it comes to BIOS virus corruption. Accordingly, there will be a problem with turning on the laptop.
Independently fix the problem is unlikely. As in most of the previously mentioned cases, it is better to take the computer to the service center. There will help not only to restore the working capacity of the laptop, but also to prevent it from viruses.
Fortunately, this scenario is quite rare. But it should not be excluded. Especially if the user himself admits the presence of viruses in the computer. Sometimes the problems of turning on the laptop arise after the treatment of the operating system. Then it is enough to reinstall the "BIOS" first, then the OS. After no trouble will no longer bother. 
Instead of conclusion
What can be summed up? It should be noted that in most cases both diagnostics and troubleshooting are reduced to contacting a service center. Most often, many do. After all, a laptop is an extremely complex device. Repairing it yourself is not as easy as a stationary equivalent.
If you figure out why it did not work out, you can immediately contact specialized centers. If there is a suspicion of any specific malfunction, it is necessary to inform the service workers about it.
Have you broken a laptop? Are you trying to turn it on, but before you only a blank black screen? This is a very unpleasant situation, but even in such a situation, you can try to restore its working capacity or at least try to determine what is wrong with the laptop.
The most common cause of malfunction is, but sometimes there are more serious malfunctions, which we also consider in this article. We will begin to identify the faulty component a little later, since it is necessary to begin with other steps.
Step 1. Definition of a laptop model
The first thing to start with is to clarify the manufacturer and model of your laptop. For example, HP Pavilion dv6, Acer Aspire 5520, Asus EeePC, etc. Usually, on the case of the laptop, on the packaging box (if you have one) or in documents (warranty card, delivery note) there are corresponding inscriptions.
This information is necessary to more accurately determine the nature of the malfunction, since laptops from different manufacturers may have external symptoms of the malfunction.
Step 2. Warranty check
The second is to try to check the warranty on your laptop. At this stage, you will also need the serial number of your device (usually listed on the laptop case (bottom) or under the battery).
In the photos below, you can find an example of what the serial number looks like on laptops from various manufacturers.
This information will help in determining the warranty status of your laptop, in order not to "self-medicate" if the laptop is still under warranty.
You can skip this step if you are sure that the warranty period of your laptop is over.
How to check the warranty on a laptop? If you do not know how to check the warranty of your laptop, you can use the model information and the serial number of your laptop.
Step 3. Fault determination
In order to determine which component of the laptop is faulty, there is a system of external indication of error codes. For this purpose, the LED indicators (light bulbs) of the power supply (battery charge) are used, as well as the indicators of the Caps Lock and Num Lock buttons on the laptop keyboard.
When you turn on the laptop, you need to pay attention to one (or several) indicators located on the buttons Caps Lock or Num Lock. These indicators (“lights”) will blink periodically. The number of duplicate signals will indicate an error code.
Where are the caps lock and num lock indicators on my laptop? If you do not know exactly where the indicated indicators are in your laptop model, you can use c indicating your laptop model and our technical specialists will try to help you with this.
Using the information below, you can try to determine the fault of the laptop or its faulty component. Basically, this code system is suitable for HP laptops produced from 2011 to January 2015, but some codes may be suitable for most laptops from other manufacturers, for example, Asus, Acer, Sony, Samsung, etc.
