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USB ports no longer work. CD-ROM shows nothing in Explorer

XP Home. Desktop.  User, 2 days ago,  had new monitor installed and a new video card.  Since then cannot not print to USB Printer(lexmark x73).  Tried other USB devices (external HD and flash drive) in all 4 ports (2 in back and 2 in front)....nothing was detected.  Also when browse the CD-ROM drive, nothing shows up (coincidence?).  It seems like it is not reading.  Device Manager says CD-ROM drive working properly.  Maybe there was EMI damage when new video card was installed.  Previous tech opened up computer on carpet on a very cool dry day.  Any ideas?  
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bdids
Asked:
bdids
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1 Solution
 
My name is MudSystems EngineerCommented:
Could be that the new device (VideoCard) is stealing resourses from the others (USB)...

Click Start... right click on My Computer's Properties... Hardware... Device Manager. Do you see some yellow/red tags on the devices attached to your PC???
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bdidsAuthor Commented:
Thanks but I checked this.  No yellow/red flags.
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nobusCommented:
try a system restore to a previous date, then update drivers for the installed card
if the cd does not work properly, you probably dislodged the ide cable, check it for proper seating
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nobusCommented:
..and you can test the ram with memtest86+ from www.memtest.org
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