My digital dash, the only thing that works is the speedometer, the trip/odometer works after about a minute but it shows "error" when you first start the vehicle.
So the Fuel, Battery, Temp, Oil pressure, and Tachometer are out, I cannot remember if the other lights were working or not, like the check engine, etc.
Well, I did some searching on the forums, and I really didnt find any topics on the matter at all. A USED replacement digital dash costs over $100. So before buying one I decided I would pull mine apart to see if I can figure out the problem.
The Blue board actually appears to be fine to me, I cant find anything that looks visually bad.
One the Green board I found a couple of spots that are corroded. I am going to clean up the one on the front side with a wire brush.
Going to clean this with a wire brush.
This one I am going to clean with a wire brush, and then I am going to put some fresh solder on, because it actually looks like its separated from the PCB some of the way if not all the way.
I am not sure if the two corroded parts are actually what is causing this dash to work incorrectly, I will post results after fixing it up.
I have repaired computer motherboards, power supplies, and LCD monitors that stopped working in the past, just by opening them up and visually inspecting them for a bad part, like a bulging or leaking capacitor. Most of the time when an electronic fails that has capacitors, that is the cause and it can be easily fixed.
Well, I got this dash apart, and I have already found some corrosion that I am going to take a small wire brush to and clean off. I am not visually seeing any damage to any capacitors though.
What I would like to know is if anyone has any experience testing and rebuilding these? The circuit does not seem to horribly complicated, and I own a digital multimeter. I am just not sure how to go about testing each individual component on the PCB, but I have read that with electronics you can usually go over an entire circuit with a multimeter and figure out what went bad.