My overhead console stopped working the other day so I gave it a good whack and it started working again. I thought to myself - well that fixed it - but 2 days later it went totally blank and stayed that way after many good hard licks. Time to see what's going on inside.
1. Remove the glass lenses for both the overhead courtesy light and the microprocessor.
2. Remove 3 phillips screws - the console will drop.
3. Disconect the plug connector to the microprocessor and push the microprocessor from the back. The whole unit will come out.
4. Go to your workbench. Take off the black plastic protective cover and removed both the mother board and the display. Then connect the dispaly back to the mother board. It should look something like this:



Notice the black spot on the display. I thought this was the problem - but it turns out the spot is perfectly normal. Let's look at some more pics to get to the real problem. Here's a top down with the display attached.



Now the display is removed.



Here are the resistors that you need to pay close attention to - outlined in green.



I found a hairline crack in the solder joint in the bottom right resistor. So I used my trusty 30 yr old solding iron to fix the problem.



Voila! Problem fixed. There - you just saved $400.