Gauge Cluster Repair?

This was the first attempt to correct some of the errors in the gauge cluster. As it sat before (and now to my knowledge) is that nothing on the cluster worked besides fuel level. A common fault in these is the odometer gear which drives part of the speedo and therefore that was my first check. Sure enough, it was bad and I replaced the old broken orange gear with a new white gear specifically made for this cluster. Upon plugging the gauge cluster back in the speedometer still reads a solid 34 MPH as the car idles, and nothing else but fuel works. These could be sensors, these could be bad solder joints (notorious on these), or just a bad board. There were some parts of the board on inspection that looked like water had gotten into the board, fried some resistors, and some other pieces. This will need to be inspected again in order to pass a safety check for registration. The main problem with these is that there are only a few people working on them, and therefore there is little supply for salvaged parts as the clusters are tossed when bad. Other notable items: the check engine light and airbag light were not present in the cluster (which means they 100% were on when they did work), and the onboard clock was covered with electrical tape to look solid black as replacements are $120 or more for just the screen that isn’t bleeding as mine was.