Computer turns off when I plug in a USB Device ( 10 Views )

1. So I traded for a MB and USPS slightly damaged it I had to reinsert a voice chip and the PCB is dented but it posts and works fine and is now my HTPC. So when ever I plug a USB device into the ports by the KB/MS ports it shuts down but the power light stays on and I can immedly turn it back on so can the problem that my MB is shorting out on my cheap case (Was a PITA to mount in that case standard atx and screw holes still did not line up No screws where the ports are loccated as it woukd not align there) or could it be my mb is damaged and I should kill USPS?
   
   Oh this might help
   System specs:
   A7N8X-E Deluxe
   CPU AMD Athlon XP 2600+
   512MB Ram
   OS & Programs and Data
   Maxtor 6Y80PO 7200RPM 80GB ATA133 With 8 MB Cache FDB Motor
   Video Drive:
   Maxtor 6Y160PO 7200RPM 160GB ATA133 8MB Cache FDB Motor
   (http://www.maxtor.com/)
   DVD/CD-RW Drive NEC ND-2500A
   NIC Built in to MotherBord
   Saphire ATI 9600XT
   Hauppauge PVR-150 MCE
   Speaker System Pioneer VSX-D711 Receiver
   Keyboard Logitech Cordless MX Duo
   Mouse MX 700
   Vtech Case 3688K with 400 Watt Antec Power Supply
   Microsoft Windows XP Professional
   
   
   (emre, Cuba)

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