Why does the monitor not see the computer?

Question

Iron

Hello everyone
The situation, I was sitting at the computer, suddenly white ripples went sharply across the monitor. I turned off my computer and decided to clean it up the next day.
I disassembled the computer, wiped it from dust, assembled it, and when the computer is turned on, a light flashes on the monitor, and nothing is displayed. I disconnected the monitor from the computer, connected it to the laptop, the monitor turned on, but again with white ripples.
I tried to revive the computer: I
disassembled it again, checked everything, everything is connected - the light is flashing
I changed the vidyuhu - the light is flashing
Connected directly to the mother - the light is flashing
I pulled out the RAM - the light is flashing
Pulled the battery out of the BIOS - the light is
flashing no matter what I do, the monitor does not see the system manager. If you connect the monitor to the laptop, then there are ripples.
What could it be?
Ps The Yusbi ports of the mother are working, that is, it seems to be powered by it. Gary and melting do not see.

Answer 1

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