After creating a 7.1 boot floppy, it has 20MB of memory.  While the batteries seem okay (can they still be good from 1990?) I hooked up two little plastic (2 x AA battery) enclosures to the two battery terminals and it won't boot either by keyboard or power button on the back.  It does boot up by applying one of my (2 x AA battery) enclosure fro pin 15 on the power supply to a ground source.

C42 is definitely suspect but the board dis require cleaning so I may need to do some more cleaning in case it's other capacitors?  I definitely needs a re-cap.

If anyone has seen this, I appreciate any hints.