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Old December 19, 2010, 06:31 AM
frontier204 frontier204 is offline
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Join Date: Nov 2008
Location: Ottawa, ON
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The part you explained about the GPS unit crashing everything USB on your machine sounds like a PSU (on the +5V line) or motherboard issue. It sounds like something's not delivering enough current on the +5V line, or delivering a dirty +5V. A multimeter won't help you much anyway because what's probably crashing everything is spikes on the line that a multimeter can't see.

Try all of your peripherals (headset, the GPS, etc) on another PC just to be sure that you don't have a bugged peripheral as well. If all that works, then you're looking at a power supply or motherboard replacement. I'm thinking power supply and not motherboard is the problem though, since it's a lot easier for a power supply to kill a hard drive (by sending spikes or overvoltage through the power cable) that it is for a motherboard to do the same, as its only connection to the hard drive is the SATA signal cable.
"The computer programmer says they should drive the car around the block and see if the tire fixes itself." [src]
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