Hope you can help.
I've a motherboard that seems dead. I've changed the processor, psu, memory for known working ones and disconnected all non essential peripherals (drives, USB connections).
The light on the motherboard comes on but non of the fans spin up. There are no bleep codes to help diagnose the issue. I've inspected the capacitors on the board to see if there's any obvious leakage or bulging but found no issues.
At what point in POST do the fans come on in your experience? Can I assume that if the fans don't spin then POST isn't even starting?
I should also add I've tested the on button to make sure it's resistance spikes on pressing and also swapped out the cmos battery and cleared the cmos.
One other thing to note is that the psu fan doesn't spin either.
Any feedback or ideas would be much appreciated.
Many thanks
Richard
Best Answer
When you plug the system in, the fans normally should spin for a fraction of a second, and then stop. If this happens, your motherboard is certainly working in some capacity. If not something is seriously wrong. Typically what the fans do on poweron is spin at max speed until the bios initalizes and slows them down. Early bios or CPU failure can cause the system to fail to do that, giving a system that doesn't post but where the fans run at full speed.
Are you sure you are connecting the power button to the right pins and in the right orientation? You may need to look at the motherboard manual to be sure.
Also if there are fab speed jumpers on the system make sure they are set to a speed your CPU can handle.
Beyond that you need to rma your motherboard. You didn't install the motherboard in the case directly against the metal case, did you? (standoffs are a must)