I could use a little help with a Gottlieb Spiderman I recently found. The game has sat untouched since the early 80's in a heated basement and is in super nice shape. The game has no hacks, is super original, and looks like it has never needed or had any service. Of course the power supply board was dead so we put in a brand new Gulf Pinball board. It has a nice ground lug point so it was easy to do the ground mods and run wires to the cabinet floor, the CPU, and the power driver board. I also repined all the connectors on the power supply board and the harness going to the CPU. The game now boots up and plays but after about 30 seconds the CPU seems to lock up. The displays all go blank except for a single digit "0" in the player one position after starting a one player game. The game still plays but there is no scoring or sound. The CPU appears excellent. It's hard to believe the battery has not leaked and shows 3.9V while being rated at 3.6V. There is no corrosion on the CPU at all. The board appears new. I'm guessing it's a CPU problem but I don't have another System 80 game to swap it into for testing. I just thought I'd post this before buying a new CPU. Thanks in advance for any help.

Link?

No, if I'm not mistaken there are no test points labeled on this board. Since it boots to start I was guessing it's getting 5V to start and then something on the board is causing a voltage drop.

Thank you sir, I will check that. Are these caps common failure points? Or, just usually an indicator of another problem?

Yup, rock solid 5V to the CPU.

Thanks Chris. I will remove the battery. Is the processor a soldered on chip? Would you have a board location number and part number? Sorry, but I don't have the board or manual here. Many thanks.

Thank you very much Chris. I do have a local friend who is an excellent board tech. We are going to give it a shot first. I was hoping there was an easy answer here for me first. If we don't make any progress I will certainly take you up on your offer. Thanks again.