I Probably need more help than anyone here lol!

[browngrad07]

Hello. My name Is Brandon. I have an HTC-6800/Titan/Mogul with cricket service, and Im having a problem that I have no idea how to get fixed. When I turn my phone on, it loads past the htc screen, then it loads past the alltel service screen, and then sometimes it loads past the green windows mobile screen. After that, sometimes the phone will load all the way to the main screen for usage, but most of the time when it loads past the windows mobile screen, the screen will then go completely out, while the surrounding buttons on the front of the phone are still illuminated. At this point I cant use the phone so I cut if off an attemp my process once more, but it always fails. When the phone does load to the main screen for usage, it will function on average for about 20 minutes, and then the screen will go out again. Ive browsed this site an attempted to understand the terms, in order to become aquainted with certain steps to help myself, but Ive realized that I must turn to u guys. SOMEBODY PLEASE HELP ME!!!!