I think my AD board went out on the back of my top monitor. It's the board behind the grey cover that has the VGA connection on it. Does anyone have an extra to sell? How common is it that it goes out? Maybe the capacitors?
When I first turn it on, if I jiggle it around a bit I can get the screen to come flash briefly but then it goes back off. I don't see any bad solder joints and after the machine boots and it's warm I haven't been able to jiggle it to get it to flash on again.
So I feel pretty confident it must be this board
I tested voltages, 24, 12, and 5 are all good. The 24v blue wires goes into that board on the left and then the AD board gets powered with what appears to be 2 wires coming out of that left board which probe at around 2.8v into that AD board.