No signs of power after video card swap

lurch101

Distinguished
Mar 25, 2008
57
0
18,640
So I've got an odd situation. I went to swap out my video card for a new one and noticed that the case was a little dusty. I spent some time really cleaning it out with a compressed air canister, and then went to turn it on. And that's when it happened. Or rather, that's when nothing happened.

I've got no lights on the motherboard and no signs of power in the system. I swapped the old video card back in, and still the same. I took it to my local PC repair shop, and the PSU tested good. They tried booting it without the battery and a few other tricks, but no treat.

In looking over the power requirements, both cards require a bigger PSU than I'm running (a PC Power & Cooling 420w). I'm wondering if underpowering the video card may have hurt the motherboard in some way? That's all I'm coming up with so far, unless it just misses all the dust.

To note, there was no arc or static discharge during the operation. It was a clean clean, so to speak.

Any ideas for other ways to try to make it power up? I've already emailed the manufacturer for a RMA to get the ball rolling.

Specs:
AS Rock P67 Extreme4 Gen3
Core i7-3770K
G.Skill Ripjaws X PC3 12800 (32GB)
Samsung 830 Series SSD
HIS Ice-Q X Radeon 6790 (old)
Gigabyte GV-N65TBOC-2GD (new)
PC Power & Cooling Silencer 420 ATX

other HDDs, DVD drives, peripherals
 
Look for anything that could be dead shorting your mb out. On power supply's if the 5v power good line fails a mb won't post even if the other lines are fine. Have you tried bread boarding the mb outside the case with one dimm and onboard video only to see if there any post.
 

lurch101

Distinguished
Mar 25, 2008
57
0
18,640


Just did, no love. RMA is in and new, bigger PSU on the way. And now we play the waiting game. Guess the yard work will get done.