I have problem with my computer after half year. When I turn it on, from outlook everything work well like fans, light.... But mostly it does not post anything on the monitor. It always says "No signal".

However sometimes (rarely) when I turn on it works normally. I notice it only works when the light on the case blinks during booting process.

I tried to test PSU. Chipset, VGA Card, HDD in anther computer and they are working fine. The only thing left is mobo.

What's wrong with my mobo? Is there anyway to fix it?

Thanks!