Question : Blue Screen on Sleep or Wake

Hello all,
  I'm a PC tech and I'm having issues w/ a customers PC.  It is a Dell Dimension 2100 w/ WinXP Home and a Dell M782 monitor.  The original problem was as follows:  the customer was getting video on boot-up but as soon as the welcome screen hit, his monitor went black and the PWR light flashes.  If you hit any of the menu buttons, it pops up and says Power Save Mode Hit Key to Exit.  If I hooked up his Monitor to a different PC it functions just fine and if I hooked up his PC to a different monitor it functioned just fine except for if you hit the Wake/Sleep key on any keyboard I get a BLUE SCREEN saying:
INTERNAL_POWER_FAILURE
Stop 0x000000a0 (0x00000101, 0x00000007, 0xf8bba6c8, 0x00000000)
After that, I removed the drivers for the on-board Intel 810 VGA card, disabled it and installed a PCI GeForce 2 MX400 vid card.  That seemed to fix the loss of video on startup.   I'm still having the same issues w/ the Blue Screen and if I click on Start->Turn Off->Stand by I get the following error: "The device driver for the 'Dell Enhanced QuietKey PS2 with DellTouch' device is preventing the machine from entering standy.  PLease close all applications and try again.  If the problem persists, you may need to update this driver."
  I've tried updating the drivers for the Dell keyboard that the customer has but that has not solved the problem.
Any ideas out there?
Any help would be appreciated.

Answer : Blue Screen on Sleep or Wake

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