iPhone problem

[DJ CSquared]

My iPhone keeps going blank when i lock it for more than 1 minute and it doesnt turn back on until the battery is dead and it is recharging. I dont know whats wrong. It is jailbroken since i got it, but it didnt start doing it since last week. Anyone know why? Let me know.
Thanks
Chris

 

[renewed]

Have you installed any apps recently? If so, uninstall them and see if that helps. Report back.

Also, try restarting the iPhone if you haven't, it might clear out some issues.

 

[DJ CSquared]

I deleted all the apps. It seemed like it was working for a bit but it just happened again. I'm not sure what it is. I'm gonna bring it to the place i got it jailbroken and report back. Thanks for the help