I had installed a brand new 1/2AA 3.6V lithium battery when I did the caps. I went back and checked and the voltage from the batt is only 2.5V. The batteries are stamped with a May 2011 manufacture date so I thought they should be fresh. But I was expecting at least 3.6V. Could this be causing my problem? I am skeptical because it was booting fine off a much older battery a few weeks ago.

I rechecked a lot of my cap work and it looks fine. I can't figure out what I might have done to cause this, unless it was a stray static shock somehow.