Dec 282015
 

Got this pcb from a friend of mine for a repair

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The pcb had already all the sram chips repaired and some flying wires underneath because of broken traces.

Upon boot up, it constantly reset with this message:

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First thing was to test the socketed sram chip 6264 near the 2 big customs but as expected they were good.

Tried to flex the pcb and it booted with wrong palette sometimes

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Surprisingly once it booted it could be played with wrong palette all the time until the next boot.

So the code did only a check at the beginning.

After pressing and flexing everywere I found out that the game booted only when I pressed the Hybrid module 007327

I discovered looking underneath that the module has some small srams and looking at the schematics this is confirmed.

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I turned out that one pin had a subtle loose contact. I reflown brutally everything to make it more resistant against shocks.

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Booted the game and I was welcomed to a perfectly working game

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