Problem Solved!!! Thanks to everyones help I was able to find a broken resistor on the 3.3V divider input to the op-amp. This did not measure correctly but looked fine until I put it under a microscope. I was able to attach a fairly high resolution pic that shows the resistor in question. It looks like the solder end broke loose from the ceramic plate on the left side of the resistor. I suppose this was slightly weak from the start and just failed due to thermal stress over the past year or two. I appears that the powerfail line sits at 0V under normal operation, then when power is removed the comparator flips and puts 3.3V on the line until it dies. I will fully assemble it tonight and try it out, (can't wait!)

I really appreciate everyone who helped me on this, I would not have been able to find it with out you all. Special thanks to Genixia and Rob.

It looks like I get my X-mas wish after all.

Nick