@DavidH01
Welcome to the club! What's the serial number?
When considering repairs, don't do anything to the cabinet itself. Don't repair the fiberglass, and don't touch up the paint. Don't do anything to it!
Just wipe it down with a damp cloth to remove the dust then wax it with a good quality carnauba automotive wax.
For the electronics...
You have a raster on the TV. And it looks pretty stable too. That's great!
The game looks like it's already had some work done. The supply setup is strange. Is that a switchign supply below the original linear? And the fan looks like an add on. I would start there. Get the supply sorted out. Use the original linear supply and ditch the switcher.
I would check the power with the 3 PCBs removed from the card cage first. If you can vary the voltage from 5.00V to 5.3V or so that good enough for now. If not, you need to rebuild it.
Once the supply is solid you can focus on the boards. Do a careful visual inspection of the edge connectors, both male PCB edges and female card sockets in the card cage. Any damage there has to be addressed now. Look for missing/torn/wrinked/wadded/loose PCB fingers and look for evidence of solder on the fingers. There should be none. And look for evidence of heat damage around the fingers and brown or black discoloring on the fiberglass board material itself. Ask here for help once you get to that stage. You also have to check the connector pins in the card rack. Make sure there aren't any that are missing or bent. They should all be springy and they should all be in line with one another. Meaning there isn't one that seems bent more than the others.
After you're satisfied with the quality of the connectors you can plug in the boards ONE AT A TIME starting with the back/bottom board, and readjust the supply to measure 5 VDC on the boards. The voltage will vary across the board set. You need it to be between 4.9V and 5.1V every where on all three boards. Finally, there will be a voltage drop across the connectors. After you get the 5V supply adjusted, if the voltage at the board connectors is more than 1/4V lower on the PCB than at the supply output you have wiring or connector issues.
At each stage ask here for help. There are no repro parts available for the boards or the TV, although individual components are still available for the most part.
Do you have an oscilloscope? And do you know how to use it? If not, find someone local that does and who can help you. There are plenty of knowledgeable collector/techs in the greater Boston area. I just sold my machine (
) but I think I can still help you with PCB issues over Zoom or whatever. I'm in Detroit so you have to do the work on site.
haha 
