Yep, that's the possibility I dread.
I'm still going to try what I can, though. My hope is that if it did get a shock, the damage was isolated in the PSU and/or motherboard. Otherwise, I may have to start a thread asking for suggestions on how to build a non-crappy PC for $500.
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2.4 GHz AMD Athlon 64 3700+ Clawhammer - 2.0 GB DDR RAM - Thermaltake Toughpower 650W PSU
NVidia GeForce 7600GS 512 MB AGP 8x - Sound Blaster Audigy 2 ZS Platinum Pro
1x250 GB SATA - 1x120 GB SATA - 1x120 GB IDE