The computer does not turn on. What's the matter?

Question

Iron

In general, after cleaning the computer, the computer squeaked, it was in the child's disk, I changed it and the computer started up, it worked for me for about 10 minutes and the computer hung, I rebooted it, but it was not going to start, I thought that it was the thermal paste on the processor that changed it, but the computer was not going to start everything equal (beeping), removing the RAM did not give anything, changing the railway also did not give anything, I decided to change the video card, the computer stopped beeping but the monitor did not work connected the monitor to the motherboard, it began to beep. I think the problem is in the motherboard

Answer 1

You broke him. Give it to someone who knows how to fix it before it's completely ruined.

Answer 2

How does the PC beep? Listen and write
Long signal as "--" and short signal as "-"
Based on them, you can roughly understand the problem