I screwed up this time...

[nwo]

In an attempt to undervolt my sapphire 5870 from 1.100 further down to 1.050 (stock is 1.200) I made a mess...

When I turn on my PC, the following two images is all I can see:
https://www.dropbox.com/s/dxs16gw7dy9l9ug/2014-02-21 21.23.37.jpg
then
https://www.dropbox.com/s/xeotwzbcqc1aks9/2014-02-21 21.23.50.jpg
and after a bit it goes completely blank.

When I initially undervolted the card, the same thing happened, the screen immidiatelly started filling up with those artifacts. I rebooted the PC thinking I would be able to fix it/revert it.

Now the issue here is: the motherboard passes POST, there are no LED error codes displayed. Both GPUs are emitting the video signal (display is not idle/in sleep mode). I've tried both my GPUs individually in all 3 of the motherboard's PCI-e slots and I was not able to get a good video signal.

I tested the XFX 7850 in another rig and it powered up just fine, I have not tested the 5870 but at least I have determined that it is not a video card issue.

What can I troubleshoot next?

It is an Asrock P67 Extreme4 mobo with an i5 2500k. I do not have another sandy bridge chip I can put in the mobo to test it. I only have an Ivy Celeron (G1620) and i5 (3570k). I don't want to mess things up further because I don't know if the motherboard has the latest BIOS which supports Ivy bridge CPUs so I don't think it would be a valid troubleshooting step. But I guess I could try the Celeron tomorrow.

I would appreciate any input!

 

[MagnusTheBrewer]

Have you tried resetting the bios?

 

[rgldsmth]

Ya, reset bios first.......

 

[nwo]

Man I feel like an idiot now... I pressed the clear CMOS button on the back of the mobo and everything went back to normal...

I forgot how much easier things have gotten with the new motherboards. I was also in panic mode thinking that I fried my cpu/mobo... I didn't really care much for the cards since they are the lowest value.

Everything is fine now, mod please delete this thread to save me from further embarrassment :$

 

[Virgorising]

Man I feel like an idiot now... I pressed the clear CMOS button on the back of the mobo and everything went back to normal...

I forgot how much easier things have gotten with the new motherboards. I was also in panic mode thinking that I fried my cpu/mobo... I didn't really care much for the cards since they are the lowest value.

Everything is fine now, mod please delete this thread to save me from further embarrassment :$

U R NOT AN IDIOT. Panic is human and it freezes the brain temporarily.

Being HUMAN IS GOOD.

 

[nwo]

Update:

I tested the PC at work, so you can disregard my previous post.

I took it back home (away from home) this afternoon and I have the exact same issue. Pressing the magical clear CMOS button did not do the trick this time.

So, I guess it's either a huge coincidence or undervolting the video card caused my super old monitor to fry? :hmm: