Ok, so early Expn 3 consoles had two supercaps for memory storage retention, but later in the series, we changed these out to one large coin
cell. Likely this is the issue and can easily be replaced. If you are comfortable with this work and have the
power cord removed from the
console, open the
console and remove the screws covering the CPU tray. In the forward left side, you will see the
cell.
There is another possible problem, instead of the
cell, that you should check before doing the above. The repair guys pointed out an issue that they see come in from time to time, and notably from high schools. Seems like a
power down
macro that erases the show is a popular trick to include in show files. So do look at your
macro list and make sure this hasn't been programmed in.
Let us know how this goes,
David