How do I repair the LCD backlight?

I'm in the middle of a fiasco with my iMac (read all about it here: http://discussions.apple.com/thread.jspa?threadID=822352&tstart=0). Basically I sent the computer off for repair of the power supply and got it back with a non-functioning LCD.
So it appears that the backlight is out. Using a flashlight at an angle, I can see the entire screen image (my desktop and all the icons). In normal light the screen looks black.
The question is, how do I repair it? I opened the computer and found nothing obvious wrong. There is a four inch by one inch plastic thing located just below the DVD drive with two wires going to the LCD, and the lower wire seemed like it had a loose connection. I did not pull the guts completely out to access the LCD.
I would like to fix this myself if I can be sure of the problem. I live 100 miles away from an Apple service center, so I would have to UPS it to them. CompUSA, which did the power supply repair, said I would need a whole new LCD panel for $750. He actually said that he didn't know what was wrong with it, and he would have to start replacing parts at my expense until he found what worked. The LCD panel was to be the first try (after a free power supply and logic board from the repair extension program).

I found the problem and repaired it myself. The inverter was bad, and I found a used one on ebay for $39. The computer is not in warranty.
Apple Tech support and the Apple Stores both said that for iMacs, they do NOT accept shipments and require in-person, carry-in service to Apple Stores. Third-party service centers (e.g. CompUSA) may allow mail-in service.
I'm going to get Apple Care with my next iMac, but I don't like the fact that I will have to get service from an "authorized" third-party service center that honors Apple warranties (e.g. CompUSA). I would prefer Apple service, but 4+ hour drives each way are out of the question.

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In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
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