I run SageTV in my house, which is a DVR that runs on your computer with external tuners that record to the computer's hard drive. I have one tuner from Hauppauge called an HD-PVR, which all of a sudden stopped functioning. The power light was on, but it was no longer being recognized by Windows. I read on the SageTV forums that this problem could be caused by the 5v cheapie power supply going bad. I tested the power supply with my volt meter, and it read a rock-steady 5.18v. But after trying several other possible fixes, I finally swapped in the power supply from my Squeezebox, which is also 5v, and sure enough that fixed the problem. It's definitely the power supply, if I swap them back and forth the problem comes and goes. But yet the bad power supply still reads correct voltage on my meter. Anyone ever see something like this before?