I recently resurrected my long non-functioning Polaris thanks to the new membrane panels from Paul DeRocco and a DAC obtained from John Leimseider (thank you gentlemen).

I have cleaned everything and changed all the capacitors. I followed the steps in the service manual to restore the settings. Loading the factory patches was done via MidiOx. Everything works great. Sounds great. But my Polaris will not hold anything in memory beyond 20 seconds.

I have new D-cell batteries in and I check with a voltmeter that indeed 3.1V is getting to the main board when the power is off. I even bought new memory RAM chips (the 6264 size) and replaced the 6116 original chips. I switched the jumpers, had the battery disconnected from the mainboard when the RAM was changed and took static precautions when I handled the RAM chips. I can load patches and everything works but once the Polaris powers down, nothing is retained in memory - patches, tuning, settings all wiped.

So I am stuck. What else can I check? What am I missing? I'm so close to getting the Polaris working again.

Thanks

Brett