If the computer does not turn on, then, first of all, you should check the monitor. The plug may have loosened, and the boot process is simply not displayed on the screen. Check network cable and network connection. Before taking drastic measures, it is necessary to make sure that all necessary manipulations are performed.
Here are the possible reasons that the computer does not turn on, does not squeak, does not show signs of life:
- the network filter is disabled;
- power supply is off;
- no contact with the network;
- fixing of components has loosened (it can be a video card or monitor, a motherboard or other components).
Often the cause of the failure is a malfunction of the power supply. In most cases, it has to be changed, since it is quite difficult and expensive to repair modern power supplies.
However, it happens that the computer turns on, but does not boot. This may be due to the failure of the video card. To check suspicions, you should remove the card and install it in another system unit. If it is working, then the reason may be a failure of the BIOS settings. In this case, you should check how the program is debugged.
To do this, when loading, press the Insert key - it will help reset the changes and return to the default settings. If the key does not work, then you can try to fix the problem manually. To do this, the Clear CMOS jumper, which is located on the motherboard, must be transferred to other contacts.
Often, removable media or floppy disks are the cause of a download failure. Therefore, before starting the computer, you must remove all third-party drives. If the computer does not turn on, it is recommended to pay attention to the special sounds of the system unit.
One signal indicates error-free loading, and if the video card is faulty, the system unit will give one long and three short signals. The absence of a keyboard connection is notified in the same way as a video card malfunction. If the graphics subsystem is faulty, then one long and two short signals will be heard.
If you frequently restart the computer , pay attention to the health of the RAM module. One way could be to install special software. If the computer reboots at such a frequency that software installation is not possible, it is better to temporarily replace the RAM. If the malfunction disappears, then the problem is still RAM.
It happens that the computer does not turn on due to cooling. In this case, you need to check the cooler and BIOS settings.
But if the computer is healthy and the operating system does not boot? This may be due to the fact that the system was damaged as a result of a virus attack or an unauthorized shutdown. In this case, the files necessary for the correct download are either erased or damaged. You must try to start the computer in safe mode, restore the previous state and restart it in normal mode. If the computer still does not turn on, it is recommended that you check the startup. Perhaps some program is interfering with normal startup.
If all attempts to return the computer to life are futile, you can decide on extreme measures - reinstall the OS.