My macbook boots up and only stays on for 30sec and goes into sleep mode

My macbook boots up and only stays on for 30sec and goes into sleep mode! Any suggestions as to why this might be happening? Thanks....

I assume you have checked your sleep settings in System Preferences>Energy saver
I also assume this has just happened recently and spontaneously, not after installing any particular hardware or software or you would probably have mentioned it...if anything new has been added recently, obviously just remove it!
It could be the battery - have your tried it just on mains? If it's a pre unibody MacBook try it without the battery at all. This could happen if you have a non-Apple (cheap Chinese) replacement battery.
Try NVRAM, PRAM & SMC resets (Google if you don't know how)
Try booting from the install media and repairing or reinstalling OS X. (Back up first!)
Just out of interest if you boot from a DVD or go into Open Firmware or Boot Select modes, does it still sleep after 30 seconds or is it just in OS X?

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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:
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Step 3. Right-click Command Prompt
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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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My macbook boots up and only stays on for 30sec and goes into sleep mode

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