BattleShark - Dying Out

ArcadeTechGW

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Donor 5 years: 2012, 2022-2025
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I'm working on a BattleShark - the game has been online for around 2 months now, and was giving little trouble other than a rare coin mech jam.

That changed last week - the arcade took a power surge, and this game was knocked off line. I scoped the power supply - the DC was solid - no AC ripple at all. The -5 was a little low, so I bumped up the +5 to 5.2, and that made the game stable for a day.

Now it's back to the previous trick - the screen goes all yellow, or the CPU resets and goes back online.

Any suggestions on where to start with this one would be appreciated. I started with the power supply, and the obligatory pull / reseat of the connectors, with no success. I'm starting to think I might be seeing a RAM failure.
 
Repaired (I think....burn in in progress)

Game: Taito Battle Shark

Original problem: Game would fault out and go to a yellow screen after being on for a few hours.

As found: Game would not "start" on power up. It would fail to a blank screen.

Solution: Pulled main game board (it comes out through a door on the front of the game that gets opened from the inside.)

Removed (one at a time, after noting orientation) each socketed chip on the board, burnished off tarnish, reinstalled.

Cleaned edge connector (both sides) and pin connector on game board.

Re-installed, returned to service. Game play tested SAT.

I'm doing a 24 hour burn in at this point to make sure this action resolved the problem.
 
If that's not it then you'll want to check for overheating issues...

Component cooler is your friend.
 
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