I have a XPS400 with a 1905FP monitor w/FeForce 9600 graphics card. The USB port failure occured well before the upgrade, however it only seemed to fail after the system came out of a screen saver or stand by. I updated the monitor drivers with Dell either before or after I added the graphic card and it seemed to work for a while even after coming out of screen saver, but now it only works at times. Sometimes it does even work when the computer is first booted up. Any suggestions?

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