Hi everyone,

I have a TSPP with some problems I am not sure how to fix and hope you all could help me out. It's been almost a year since I encountered my most recent issue and gave up on it, so some of the things may be out of order or not remembered exactly correct.

When I got this game it was mostly working, I just had to replace a few transistors in order to get it fully functioning. Once I accidentally forgot to trim a transistor's legs so they touched the metal mounting plate(oops). This caused the game to continuously restart over and over until I found my mistake and fixed it. The game played fine after the fix. I later removed the batteries and put the NVRAM chip in. I also added removable trim pots to eliminate speaker buzzing(currently the pots are removed). Sometime after the batteries were removed the current problem started happening.

At first it was the DMD display turning off but it would still display some info but not from the cpu, a manual power cycle would fix it temporarily. I replaced all the ribbon cables to see if they were the problem. The issue persisted and transformed into the current issue of the whole machine restarting itself. If I power on the machine after it has been sitting off for a long time the machine will turn on fine and start a game fine, even the display works fine. Maybe within a minute or two it will start having problems and make a beep noise and turn off, then turn back on. If I manually cycle the power at this point it will turn on fine but the problem will happen much sooner now. Now it just turns itself off and on over and over but kind of randomly. I will attach a short video of these symptoms at the end to hopefully clarify what I am seeing.

Today, I took out the backbox fuses and tested them for continuity and all of them made my multimeter beep. I also tested B21 and it showed 9.5v. I noticed the 50v led was not lighted for some reason so I restarted the machine and the led came on and B1 tested at 70-80v. I started a game and soon after the restarting issue occurred as described.

I am not sure what to do at this point. It seems 5v is being produced but the game restarts. Any help is appreciated as my family would love to play it again.

Thanks,
Jman44

I don't see any pot to adjust on mine. Here are some pics.

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Thanks, I must be blind lol. I didn't need to mess with it though.

Good advice, I did not mess with the 5v and I found some extra screws to replace the missing ones.

Instead of reseating I replaced it with a connector I had previously ordered. The old connector was cracked. After replacing the connector I turned the machine on and...it worked! I played two whole games without any restarting issues. Thank you for your suggestion. I would never have guessed a faulty connector could cause that kind of issue.

Thanks to everyone! My daughter will be very happy tomorrow to find her favorite game is working again!