I have an I game with a 3902 rev A board. I had to replace the battery took it to interstate and had them solder in a new one.
Went to power it up still got Main battery low. Check the battery voltage (good) ran a clear procedure but still comes up main battery
low.

Any help greatly appreciated.
Thanks Dansgames

| « Reply #1 on: December 21, 2011, 09:35:52 PM » |
Check R36 near the battery. It should read 100K, but will probably read significantly higher if it's bad. I had two boards with that problem and replacing it fixed them both.
Tilt
| « Reply #10 on: February 05, 2012, 03:21:34 PM » |
Thanks for all the replies, it turned out to be the R39 was open. Special Thanks got out to
Tilt for isolating what chip it was.

Dansgames