windows 8.1 screen going black

I am running windows 8.1 and I've set my screen to not go to sleep until 3 hours, never go to sleep.  But after about 1 or 2 minutes, after stepping away from my PC, the screen goes black.  Why is that?  Where do I change that setting, as I couldn't find it anywhere???

afactsNetwork EngineerAsked:
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McKnifeConnect With a Mentor Commented:
There are no other power settings, but I understand your point. Wasn't there a common win 8 problem with power management (also mentioned at ee)? Would have to google myself.

Many computer manufacturers pre-install their own power management software which overrides windows own settings. Are you able to find out what software that could be?
If not, please name the computer model.
afactsNetwork EngineerAuthor Commented:
I have a Dell desktop PC.  I was running windows 7 Pro, and it never did that with win 7, so I don't think it's the PC, but windows 8.1 setting somewhere.
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afactsNetwork EngineerAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for afacts's comment #a39787437
Assisted answer: 500 points for McKnife's comment #a39787101

for the following reason:

Thanks for your input anyways!!!  I appreciate your willingness to assist!
afactsNetwork EngineerAuthor Commented:
Thanks for your willingness to help!!!
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