fans spin for a second then nothing

[g-dogg]

Hi, i just bought a 9800se off ebay put it in my pc and was working perfectly fine, well yesterday i felt it was over heating so i pulled it out and added a fan to it put it back in then i turn on my pc, and see random white lines and yellow dots. so i shut down quickly remove the video card and put an old MX4000 and try to boot but all i get is a brief spin from the fans then the computer dies. So i replaced the power supply and still nothing, i pulled it out of the case and still the same thing happens, what do you think happened? did i fry the mobo?

Edit:
my specs are:
sempron64 2600+ @ 2.4ghz
Biostar NF3-754
9800se sapphire
400 watt silenx psu
512mb generic ram (2*256)
100gb wd hdd

and i did try reseting cmos and removing the cmos battery.

and thanks
G-dogg

[glc]

Sounds like you may have.

Use the jumper to reset the cmos - this will remove the overclock. Try another out of the case.

http://forum.pcmech.com/showthread.php?t=132409

[g-dogg]

i just rma'ed the board. Newegg is the best really, after using the board for 8 month they accepted the board even though i told them i might have fried it. Great company, really.

G-dogg