A-Bit KR7A 133R Not Booting Up

[HiTek21]

I was working on my PC, changing the heatsink fan and when I started it up everything powered up but nothing displayed. I thought that fan did something so I switched it back to the old one and nothing displays. I changed video cards from my GeForce3 to a GeForce AGP and nothing displayed. I might have bumped a few cables while changing fans but It doesn't work even after making sure the cables have been secured.
I switched motherboards with my dads PC(Same board just no raid controller) just to test things out and it works fine. Do you suppose my motherboard is dead?

 

[Jayczar]

It could be, but whenever I have mobo problems
I always test it out of the case with minimal
known working components(VGA,RAM,CPU).
Clear the CMOS as well as alot of boards will
"get confused" and not boot when you change
components for some reason.

 

[mechBgon]

Could you be reversing the heatsink by accident? The base has a step cut into it for clearance over the solid-plastic end of the CPU socket, like this. What heatsinks are you working with there?

 

[CaptnKirk]

Ground the CMOS, then put the jumper back to the run position. Matter of fact, see if maybe the jumper has been knocked off
of the CMOS, and re-check the CPU fan header to make sure it is attached to the CPU fan header next to the power cable connector.
Also do what Mechbgon said - check the heatsink orientation to the CPU socket cam-box.

 

[maluckey]

Could you be reversing the heatsink by accident? The base has a step cut into it for clearance over the solid-plastic end of the CPU socket, like this. What heatsinks are you working with there?

Been there, done that, it was fatal to the CPU in just a few seconds. I always pay extra attention with /heatsink nowadays.