Macbook 13" Backlight Turns On and Off when Screen Moves

I've started having an annoying problem with my Macbook. Sometimes when I open the lid, the backlight won't come on. If I move the lid around for a while, the backlight sometimes comes on, but if I make any sudden movements with the laptop, the backlight will go back off. It's getting to a point where I might have to fidget with the lid for a good 10 minutes before the screen comes back on and I can't deal with it anymore. I know the screen is still working because if I put it under light, I can sort of see what's supposed to be there.
It seems likely that the problem is a loose cable somewhere, but I took the screen apart and couldn't see anything glaringly wrong. The laptop is out of warranty and I have a significant amount of experience with PC repairs, so I plan on fixing this myself. Does anyone have any idea what could be wrong? I keep reading that most times people have problems with the backlight, it's because the inverter has gone bad. However, the fact that the problem is caused and resolved by moving the screen around makes me doubt that the inverter is the issue here.
Any input is appreciated. Thanks, guys!

FIrst, did you do a power reset? http://support.apple.com/kb/HT1411
Second, are you running Boot Camp or Apple OS X when you put the machine to sleep?
Third -- do you have Bluetooth turned off? (It's a known problem if you have other Bluetooth devices on that are searching for Bluetooth devices -- like leaving your iPhone near your MBP and both have Bluetooth enabled...
Your not leaving an iPhone plugged into the USB port are you? Unplug it and use a wall charger.
What else is on your network that might cause it to keep turning on? Do you use anything within the house that searches for a network signal throughout the day? -- Slingbox, for example?
Other problem solving tips are here:
http://support.apple.com/kb/HT1776
http://support.apple.com/kb/TS2369
http://support.apple.com/kb/HT2412

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Macbook 13" Backlight Turns On and Off when Screen Moves

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