HP Desk top Model # 500314 Sleep Mode/Moniter will not wake up

HP Desk Top Model 500314- Windows 8.1 OS.
PC will go into sleep mode but after approx 15/20 minutes when I want to wake it up the PC wakes up but the moniter will not wake up(just a black screen).
I have reset the power settings numerious times with all variations! same results. It is strange that the sleep mode works fine for the first 15 to 20 minutes and then the problem appears?
All other aspects of the PC seem to be working alright. This is a new PC about 2 months old and the problem appeared from the first time it was turned on. All the latest Drivers and Windows updates are installed. HELP!

Hello @larhoop,
I understand that you are having issues with your HP Pavilion 500-314 Desktop PC running Windows 8.1 not waking up properly after being asleep for 15-20 minutes. I am providing you with an HP Support document: Troubleshooting sleep and hibernate issues in Windows 8, which has been designed to address issues such as the one you are facing. The steps for Windows 8 and 8.1 are the same so review the document and apply the steps set out within.
Please re-post if you require additional support. Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
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"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

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Monitor goes into sleep mode and will not wake up

My monitor goes to sleep and will not wake up. I try powering off and that will not respond. I have to unplug the workstation and start back up. I have turn off sleep to never sleep and now it just goes to sleep when Im working.

Hello @rosendahl14,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your monitor goes into sleep mode and will not wake up, and I would be happy to assist you in this matter!
To rule out any sleep mode issues with the monitor, I am providing you with some steps you can try below:
Step 1. Unplug the power cord from the back of the monitor and the wall
Step 2. Hold the power button down for at least one minute
Step 3. Plug the power cord back into the monitor and then into the wall outlet (not a power bar or surge protector)
Step 4. Press the Menu button on the monitor
Step 5. Navigate to the Factory Reset option and select it
Step 6. Try a different cable connecting your monitor to your computer
If the above steps did not resolve your issue you can try the monitor on a computer or other device to see if the issue persists. Please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.
http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
To further diagnose a possible hibernation issue with your desktop, I recommend following the steps in this document on Troubleshooting sleep and hibernate issues (Windows 7). I also recommend following the steps below to reset your system's power management settings:
Step 1. Click the Start button
Step 2. In the search box, type "Command Prompt"
Step 3. Right-click Command Prompt
Step 4. Click Run as administrator
Step 5. At the command prompt, type powercfg /restoredefaultschemes and press Enter
reference: http://superuser.com/questions/669571/windows-8-1-64-bit-power-schemes-gone
Please re-post with the results of your troubleshooting, and I look forward to your reply!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

Computer went into sleep mode and will not wake up!

I have a HP Pavilion a350n which I love and have never had a problem with it.....until now.
When I turn it on I get a black screen with a small window that reads "Warning" "PC entering power saving mode" Then the screen goes blank and the blue power light on the monitor turns an amber color. The only way I can turn off the computer is with the blue power button on the front of the tower.
Every "fix" I have come across says to do a System Restore from the Start Menu....How do you get to the start menu when you can't wake up the computer!
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I tied hitting the F1 button at turning on the unit and nothing......
I checked the monitor connection at the rear of the computer and can't see any bent or broken pins. Cord looks great too.
I took the back off and was going to try and unseat the memory card and reseat it again, but I don't know much about the inside of a computer and am not sure where the memory card is or what the hec it even looks like!
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Kate Bernard wrote:
The OP said that the computer will not awake from sleep, but did not mention any troulble with WiFi.
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Message was edited by: rimini

rimini,
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Will not wake from sleep mode

When I close then open the lid on my MacBook, it will not wake up from sleep mode. I have to reboot by holding down the power button for 10 sec. When it restarts, it takes a long time to get past the gray screen with the apple logo. I also have this same problem when it goes into sleep mode, when left idle. I have since changed the settings so it will not go into sleep mode when idle in system preferences. I have reset PRAM and SMC, but the problem still persists.

I have the same problem, intermittently. I think it has something to do with full-screen mode, which I use intermittently. Have you noticed this happening only when you are in a full-screen app?
I also have a MacBook Pro from 2011, and I know for sure my MagSafe power adapter is fine and not part of the problem.
I have noticed a few things that may be hints at what is happening:
one time, (all??) while my screen was basking in the glow of sunlight from the side, I saw that the screen pixels were indeed "on", that the back-light of the screen was just off.
Which led me to the conclusion that my MacBook Pro was indeed waking from sleep, the screen was just not lighting up.
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To "capture" the culprit I think I could set up a hot-key command that takes a snapshot of all running processes in Activity Monitor. This could show what processes are running when "waking" from sleep. nabbing the culprit?
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HP Desk top Model # 500314 Sleep Mode/Moniter will not wake up

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