Happy Holidays to All !

I have a friend who just purchased an Amazing Spierman for $300.00.
It's a little rough but complete. When he brought it home it was pretty much DOA except for the GI lights.
I'm no tech, but I keep my EM and DMD games running and in good shape.
I had never worked on a system 80 machine before but he asked me to look at it and after reading the System 80 Pinwiki section and some other repair guides I went to look at it.

After changing some fuses , resetting the connectors and turning up the 5V on the power board from 4.6v to 5.2v I got it to boot up and play. Everything but the controlled lights are working.
It does not have the ground mods. to the boards but the two ground wires in the jumper from the MPU to the controll board were added. It also has the original battery sensor pack on the board but no leaking that I can see.

With everything else working can the not having the ground mods. or not replacing the battery cause the controlled lamps not to work ?
if anyone can give me some advice on how to troubleshoot the controlled lamps it would be much appreciated.

Thanks scrdube. He does have the instruction manual so I have the scematics. I did check the relays and clean the contacts last time I was there. But it's on my list to double check when I go back.
how do I check for power and ground on the controller board ?
I did check the TP's on the power board but not sure where to test on the controller board.

Thanks I can figure that out. I go back Tues. to look at it, i'll let you if I get it working

Sorry I didn't post back sooner.
my friend ended up just selling the machine as is so I didn't go back to work on the controlled lights