Help with fixing a Panamatik Woodstock calculator

[teenix]

Is the PRGM switch working, sometimes the old contact lubricant goes hard and proper contact is not made. Maybe pushing it down lightly and wiggling it may make it work intermittently. If so, it is the contact.

Fixing it properly might be a problem as that could require dismantling of the keyboard.

The attached image shows the connections to test with an ohmmeter to see if the switch works properly. The is the back of the keyboard, button side down.

Switch = Run = Short
Switch = Prgm = Open

cheers

Tony