Hp co-ouder starts up shows the hp logo and then it says monitor is going to sleep

hi guys
i have this hp computer for like almost a year and i really enjoy it but for some weird reason the next day my pc did something strange when i click the power button it goes on and then it shows the hp logo and then after a little while it shows a message monitor is going to sleep and then it restart itslearning till i turn it off
can anyone pls help me with this problem i didnt find anytime on the internet
already thanks for helping

Hello @i__need_help,
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 understand that your computer automatically enters sleep mode before it can boot into Windows, and I would be happy to assist you in this matter!
To further diagnose this issue, I recommend booting your computer using Windows 7 Safe Mode to change the power management settings.
If you are able to successfully boot into Windows, please follow the steps below to restore the default schemes on your system:
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!

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