The computer, after setting up in BIOS, does not reach the motherboard loading. What's the matter?

Question

Iron

I went into BIOS to change the boot from sata to usb (as I did before). Then I saved the settings, turned off and turned on the computer - but it does not load the motherboard. The fans are working, the LEDs on the panel are on, there are no squeaks. There is not a single inscription on the screen, even the logo of the motherboard does not come out. Replacing the battery did not help, as did the rearrangement of the Jumper near the battery

Answer 1

Take everything out. Assemble on the table: motherboard, processor, memory, power supply.
Disassembling a computer completely is both soothing and helps to clean it, and removes the influence of faults on each other. And, quite possibly, reset the settings to factory settings.

Black screen

A monitor disconnected from the computer usually shows "Oops, no signal."

Answer 2

Get "battery" > "insert battery".
If it doesn't help, it's not the BIOS) Is the
cable connected to the monitor? Is the monitor turned on? ))
"There are no squeaks" - is the speaker present and connected?

Answer 3

Have you tried unplugging the cord from the power supply for 3 minutes?