Thinkpads Forum

LCD is dim and no longer (very) responsive to the brightness control: the screen turns on dim and remains that way - unless I apply pressure on the brightness slide or the area around it on the front cover. As long as I maintain pressure, the LCD responds to the brightness control as it should. Released, it goes back to the resting, dim state.
I opened the assembly - mainly just as a fact-finding mission - and made sure all the connections were tight. But I also found a strip of tape in between the front cover and the LCD near the brightness control - makes me suspicious that the problem might have occurred for the previous owner.
Any ideas?

My best guess is the Inverter (the long, thin circuit card with the slider on it) is flaky.

One other thing, I had a 770 with a similar problem and there were 3 screws holding the inverter in place. Adjusting the tightness of the middle screw made the LCD work properly or not. I avoided buying an inverter card (for the moment).

Hope this helps.