came home to BSOD - lost DDC info

[VirtualLarry]

I just came home tonight, and my 24/7 OCed PC had an "IRQ_LESS_OR_EQUAL" BSOD. I rebooted, and the screen flashed off (black - no signal) twice while XP was booting. Eventually, when I got to my desktop, the resolution was all wrong. It turns out, I lost my DDC info somehow - it's not detecting DDC and therefore the proper resolution support. I managed to get back to my LCD's native resolution, by manually specifying a max res of 1680x1050 in the advanced display properties. I have an ATI Radeon X1950GT, using a DVI-I to VGA converter. I've rebooted twice, and still no DDC to be seen.

Is there a way I can diagnose this problem? Is it the video card, or the LCD? Did something wipe out my DDC info before/during the BSOD? How rare a problem is this? It just seems strange to me.

It was raining out too, while I was away. Is it possible that lightning caused this problem? I have my computers on an APC BE550R UPS, and my other computer was just fine when I came home. (Both were left running.)

 

[Cutthroat]

I had that problem once. The solution was to unplug the monitor from it's power source and from the PC, leave it for a couple minutes, then hook it back up.

 

[VirtualLarry]

You know, that worked! I had a power outage, so I shut down my PCs and then turned off the UPSes for a day, and then when I powered everything back up, my DDC info was back!

 

[Cutthroat]

 

[Schfifty Five]

What's DDC?