But the clues are there pointing to cable and contact issues. Did you try a new cable?
Received a Macbook with the backlight not working. So I replaced the inverter, no fix. I replaced the screen and LVDS cable and now the backlight works, but goes out intermittently when the screen is moved back and forth. What else could be the issue here? The cable isn't pulled under stress when the screen is articulated. Are there any other variables in the chain that would cause these issues?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic