Why did the computer start to boot immediately into the BIOS?

Question

Iron

After turning on the computer, he thought a little, showed the logo of the motherboard and for some reason began to open the BIOS, as a result, he rebooted himself and went around the second circle.
After reading the forums, I vylyuchil all USB devices and tried to turn it on, but it didn’t work, it freezes when I try to enter the BIOS.
I also noticed that the cooler on the processor does not always start and the cooler on the back of the system unit stopped starting altogether.

Answer 1

it can enter the BIOS if it considers that a user reaction is required, for example, the cooler on the CPU did not start, it reboots from overheating, because. not everyone can work without a cooler for a long time.

Answer 2

And I, as a service engineer, will not recommend anything, except for "take it to the SC."
For then it will come out more expensive and the master is more hemorrhoids.

Answer 3

Thanks everyone, the problem was in the motherboard, it did not start the processor