WD External no longer recognized

I've had a WD My Book 2.0 500gb for about 6 months now and it has worked perfectly fine... no funny sounds or anything. Well, today I reset my computer and unplugged my external while doing this. I did not think it was a big deal, but when I went to plug it back in a few hours later it was not recognized.

At first, the blue indicator light was on so I looked under Disk Management and Devices but it was not there. Tried 2 other USB ports and then I unplugged the HD from the power strip, let it sit, and replugged it. Blue power light flashed and did not come back on... still no recognition. I then tried it on another computer and it was not showing up either.

Next, I googled around some more and I went through various booting and rebooting sequences and made sure Plug and Play is activated. I am pretty clueless here... the only thing I can think of is that I fried the power switch in the case. I can't imagine I corrupted the data or anything else by unplugging it without ejecting first, or through the reset. But, before I open it up and void my warranty I wanted to check if there were any other ideas or things i could try.

I am running a brand new computer with XP SP3, and a EP35-DS3L if that information is relevant.

Thanks.