Message #83929

[Steevsee]

This is from http://www.pinrepair.com/sys37/index2.htm#factory

Dead batteries (or worse, dead corroded batteries) will cause problems getting a system4 to system7 game to power-up properly. On these games, if the batteries are dead, the game can still boot, but will come up in "audit" mode (system3 games do not have this boot-up audit mode). To get to attract mode, turn the game off and on again quickly. If done fast enough, the game should come up in attract mode. Note on System6 and System7 games, the coin door *must* be open for this to work (memory protection switch open).

If the game still doesn't come up in attract mode, even with the "turn it off and on quickly" trick, the CMOS 5101 RAM chip at IC19 is probably bad.

Please refer back to the Batteries and Battery Holders section for more information on this subject, including how to test the batteries, blocking diode D17, and the CMOS 5101 RAM at IC19.

Any signs of corrosion around the battery Holder?