samsung s3 boots up and then once loaded it turns itself off again

[chelsea moo 18]

take the battery out of my phone and put it back in again. i press the power button to boot it up, it then boots up and gets to the home screen but then turns itself back off again

 

[Rukbat]

First put it on the charger for 24 hours - it could be an almost discharged battery. If that doesn't fix it, bring it into a shop and ask them to try the battery in another phone - it could still be a bad battery. (Don't panic - you can buy a new battery on Amazon for WELL under $10.)

If it's not the battery, it could be a bad app or SD card causing it. If you have an SD card in it, take it out, then try again. If it's a bad app, boot into safe mode (see How to boot the Galaxy S3 into Safe mode? ).

At very worst, if it's not a hardware problem (that requires a shop, parts, labor and it might not be worth it worth an S3) it may beed the ROM reflashed. Again, it's something you can do - see [Samsung] How to flash Stock ROM via ODIN. (Try not to die of boredom after the flash completes - it's 10 minutes of watching grass grow in the winter.) Back the phone up first (Backing up an Android Device) because you'll lose every change you made since you got the phone - texts, apps you installed, data - everything.

 

[chelsea moo 18]

thank you that has helped a lot.
i have got a new battery on its way so i will try that one if not i will try the other methods