[Anwsered] computer will not go in to sleep mode

computer will not go in to sleep mode

My computer will act as if it is going to sleep - the monitor will fade to black and the computer will make a "click-off" sound - but the fan/lights are still on and it generally does not appear to be any different than the on state.
I can directly tie this issue to the installation of a new video card (Nvidia 8400 gs) as it was working before the installation.
All drivers are up to date and the rest of my computer is responding normally.
Googling the issue recommended I set several devices in the Hardware Manager to not allow it to wake from sleep.
This has been done with no effect.
Also, several forums recommended alter the Power Options to make sure that media sharing cannot prevent sleep.
This has also been done with no effect.

Anwsers to the Problem computer will not go in to sleep mode

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