|Did you actually remove the processor from the motherboard? |
Not saying you did this, but folks that couldn't get the heat sink off the processor have pulled the processor out of the ZIF socket without releasing the lever. Then reversed the process the same way.
Some other possible causes are that you disturbed some wiring or cards. Solution is to re-seat all cards and cables, one by one. This includes the memory modules. In the case of the memory modules snap each one in and out 4 or 5 times to burnish the contacts.
The CPU fan MUST be connected to the header marked CPU fan.
If you didn't take proper precautions to prevent static discharge you may have damaged sensitive components.
Did you use a vacuum cleaner inside the case?
As far as swapping out your motherboard is concerned we would need to know the full brand and model number to verify the remaining hardware will work. RAM might be an issue.
message edited by OtheHill