The battery caddy on the system board was decrepit. Many restorers move the backup batteries of of the board to protect it from battery acid. This is wise and I did the same. It required removing the old holder and installing a jumper wire, then putting a Radio Shack battery holder on the back box.
![](https://spacestation.santoro.com/wp-content/uploads/sites/9/2012/10/P1020846-300x225.jpg)
The corroded battery holder – before.
![](https://spacestation.santoro.com/wp-content/uploads/sites/9/2012/10/wpid-IMG_20121018_104907-300x225.jpg)
The battery holder removed – After.