Help with Apple Studio Display Problem

Ok, just to get the specs out of the way - 2 17" Apple Studio Displays, Dual Core 2.3 PowerMac G5, running OSX 10.4.7, 2.5 GB RAM.

Saturday night we had a VERY bad storm - my wife and I were out when it hit, and my computer was on. I wasn't too worried as both displays and the tower are running off of a UPS/Surge Protector.

By the time we made it home, the battery backup had run out of juice and the system was shut down. We were out of power for about 12 hours. When the power came back up on Sunday - I booted up my mac.

As the initial Apple logo bootup screen popped up - I knew something was wrong. The background was a dark gray and the apple logo light gray - the opposite of what it is normally.

After the computer finished booting I'm left staring at my 2 displays in amazement. The display on the left looked as if the display had been inverted in the Universal Access Pane, and the right display was perfectly normal.

I can go into the Preference Pane, or use the shortcut Cmd+Option+Cntrl+8, and all this does is flip which display looks normal and which one is inversed. I can't seem to find a way to get them both to display the same.

I've repaired permissions, I've rebooted, I've reset the PRAM, I've trashed preferences, I've scoured the Apple Discussion boards, I've spent hours on Google, I've run hardware tests on my G5, swapped the display outputs on the card to see if it was the video card - but the same display always shows inverted. I've also connected the suspect display to my Powerbook and it does the same thing, which leads me to be pretty certain its an issue with the display - not the CPU. I have no idea what to even try next.

Does ANYONE have any ideas or leads for me to check out? I'm open to anything at this point. I've found a place that sells replacement parts, but have no clue what part I would even go about replacing.

Thanks in advance for reading this ramble.

 

Solved

Just solved the problem. The only thing I hadn't tried was connecting the display without the ADC to DVI adapter. Unplugged the one that wasn't working, and plugged it into the one that was and the display lit up perfectly.

To my surprise upon plugging the other display into the adapter that had been faulty, it displayed perfectly too.

Just thought I'd post in case anyone else happens to run into this weirdness. Just glad it only cost me a few hours of investigation rather than a few hundred dollars for a new display.