Some Dell Latitude D6xx units with a dedicated ATI x300 graphics card seem to have problems with the audio-out jack. Symptoms of this problem include a noise or whine when an audio device is connected to the audio-out jack. Up to this date Dell does not have a clear solution to this problem.
A number of Dell Latitude D6xx units will develop microscopic fractures of the motherboard.
Symptoms of this problem may include inability to turn on the computer, unexpected shut down within 30 seconds of being turned on, or visible screen artifacts while in operation. This problem also frequently contributes to the blue screen of death (BSOD) in Windows.
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