Troubleshooting SInistar

YODAinMN

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Just rebuilt the PS on my Sini and can get the game to boot up into Bookkeeping mode. I've been trying to get the thing over into game mode. Any suggestions? I've messed with the credit switches, test switches and the advance switch (the one in the coin door). Forgive me for being such a Williams Noob! All I get is the systems Go screen and then it locks up on the bookkeeping reset screen.
 
Even though you rebuilt the power supply, check the voltages at the RAM chips, just in case. Sometimes there is enough oxidation at the power connectors that the voltage can drop slightly.

Measure the voltage at the 4 corners of one of the RAM chips.
The voltages should be
Pin 1 = -5V,
Pin 8 = +12V
Pin 9 = +5V
Pin 16 = Ground
The pins are numbered starting in the upper left corner (the notch is up), going counter clockwise.
If any of them are low or are fluctuating more than 0.1 V you need to check your power supply.

ken
 
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