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A Dead Diner - Sys11 board repair

People commenting on here, are you aware the rottendog system 11 boards are not easy to find at the moment in UK or europe?

Needed to use a couple recently and had to turn the work down as the original PCBs were ruined with battery leak.
 
Many things

1) unnecessary jumpers and bad nvram install by stevie wonder
2) memory address fault
3) display driver fault
4) 2 switch matrix column drivers dead

1&2 stopped it booting

To follow on from this I suspect the memory address fault was the original cause of the game going down, the nvram install was probably somebody’s guess to fix it which unfortunately added to the fault list!! Doh
 
Which emphasises your suggestion for owners to out-source board work, rather than charge in. I thought the Nvram looked poorly soldered.
 
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