failure of fingerprint reader, usb, and sound
I lost all three of these hardware options at once. I am trying to figure out what is the root source of the problem.
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The sound and the fingerprint reader are piggy backed into the USB channels through emulation on this. Each channel handles 2 devices. Hook up a USB powered device such as a known good optical mouse - something with a LED light. If the LED on the optical mouse works, but the computer doesn't respond to the gestures, then most likely the power circuit is good and the southbridge (USB controller) is bad. If the LED is not lit on the mouse/device then the power circuit is bad on those channels - most likely the MOSFET(s) or what drives them. Please let us know the results of the LED test so we can further advise you.
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