Recently, I received a Blueberry LCD in very good condition in exchange for a CPU upgrade. However, there was a problem: in certain angles, the image would stop updating, corrupting the colors and making vertical lines appear. Since the image could work if it was held with support, I thought the problem was fixable.
I received it and opened it up... a challenge of its own since there is no teardown guide on the internet. Well, you can pop the bezel off with four back screws and strategic pokes at the two middle plastic latches, and you have access to the LCD and the board, the latter being very well protected in metal shielding. Unscrewing every screw (including a screw ring fastening the audio output connector to the shielding) will let your board loose.
I started by checking the connectors, capacitors and other obvious components. Couldn't see anything wrong. Next, I poked around and flexed the board slightly with a plastic tool while it was running. Pressing down in the middle fixed the glitchiness, so I managed to narrow down the area. I then poked around with a small wooden stick, next to capacitors and pins, and then found the culprit. It was a loose pin to the main chip (the one with a heatsink attached to it). An incredibly subtle fault. A quick pass with the soldering iron to resolder the pins has revitalized the display and it now works perfectly.
