Weird 42S battery problem

[pdicamillo]

When my 42S wouldn't turn on, I put in a set of new 357/303 silver-oxide batteries, and at that time it worked normally. However, a day later, again it wouldn't turn on. I tried again with a new set of 357 batteries from a different manufacturer, and the same thing happened, so there appears to be a problem with the 42S. What's weird is the result I found when I measure the voltages of the batteries in the sets that no longer worked. In both cases, two of the batteries measured around 1.5 volts (normal), but one measured only .5 volts. I'm puzzled as to why all three batteries wouldn't drain uniformly. I thought it might be a bad battery, that's why I tried again with different batteries. Any idea what might be going on here?