I did not make any mods on the PC
how can I try to solve the problem?
before. when the power was applied to the PC, the red LED lighted up and after 2-4 seconds turned off. Then pressing the power button the PC is turned on.
now when power was applied to the PC - red LED lights continiusly
it looks like a pc can not go through the POST (Power On Self Test)
may be BIOS was crashed