There are a lot of reasons that may lead to the problem of the computer not working when you press the power button, but whatever the cause of the problem, it is definitely considered very annoying as you cannot access your data or complete your work etc., and about your files, you do not need to worry. In the worst case, you can remove the hard drive from the device and access the files on it from another device, but there are many very effective solutions to this problem, which you should try first, and here are these solutions below.
Check the power source
Many times there is a problem with the power supply on your computer, and this prevents the computer from operating. If you are using a laptop, you should make sure that the battery is charged, so try to connect it to the charger first or use a different charger. As for a desktop computer, try to use more than one cable with more than one socket. If the life of your computer is more than three years, then there is a possibility that the problem is in the damage of the CMOS battery and you have to replace it, which is a small battery that supplies the motherboard with power so that it can store BIOS settings, and the price of this battery is often low and does not exceed 10 Dollars.
Make sure the screen is working fine
It is possible that the problem is in the screen of the computer and not in the computer itself, and you can find out about this simply by trying to turn on the computer, and if you find that there is a sound coming from the computer such as the sound of the cooling fan or you find the power lamp lights up, this means that the computer is working fine, but The problem with the screen, and in this case you can solve the problem by checking the screen cable and making sure that it is connected properly, as well as make sure that the screen works through the buttons on it, if you are using a desktop computer.
If you are using a laptop, the computer may be in sleep mode and facing a problem in powering on, and to verify this, turn the laptop off completely and restart it again, by clicking on the power button for 5 seconds, then click on it again to restart the computer .
Disconnect external devices connected to the computer
One of the most effective solutions to the problem of the computer not working when pressing the power button is that there are external devices or accessories connected to the computer, such as a flash drive, disk or other device connected via USB, which causes a problem that prevents the computer from operating, and for this you have to disconnect all devices If you use a desktop computer, do not forget to make sure that there are no CDs or DVDs in the drive, and then try to start the computer, if it works well then this means that there is a problem with the accessories That you have separated.
Also read: How to Fix Windows 10 Black Screen of Death
Enter Safe Mode
If the computer screen is on but appears to you Blue screen, Which is known as the screen of death, you may need to enter safe mode, at first try to search Google using the error code that appears to you, as this may help you solve the problem, but in general, you can bypass the blue screen problem through safe mode. On Windows 7, you can easily enter Safe Mode by clicking F8 while the computer is starting up.
On Windows 8 or 10, turn on the computer and during boot, press the power button for several seconds until it shuts down again. Repeat this process three times and the computer will enter Safe Mode while it is running the fourth time. In the Choose an option section, click on Troubleshoot, choose Advanced options, then Startup Settings, and when the computer restarts choose Safe Mode with Networking, and if you find the computer is working fine, this is where the problem is with any program that you recently installed on the computer and you must clear it immediately .