Question Mobo problem.

May 2, 2020
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Hello everyone.
I have been having a trouble with my motherboard (MSI 770-C35) And the problem at first used to go like:
Sometimes when i turn it on, the processor cooler fan goes slow and the screen does not start.
Sometimes after waiting, the fan goes back to normal and the pc runs normal and other times, i have to change the RAMs' slot in order for it to work.
But now it does not start at all no matter what i do. I have tried changing the graphics card, the RAM, the battery and everything. It just runs and the screen does not start.
What could be the problem? If the mobo is not dead but maybe something i can fix with it for starters.
Thanks in advance.