ullah

Hi I have a htc hero and The digitizer broke so I opened up the phone to replace it. I put everything back together and turned on the phone. The phone gets stuck at the hero screen and It turns off by itself. I reopened the phone to check If I put everything back together correctly and everything was in proply. So I tried booting the phone with the back casing off (not the back panel, the entire back piece) and It booted sucesfully. When I put the back casing back on and tried booting it, The phone still got stuc at the hero screen and turned itself off. I have no Idea what the problem is andany help would be appreciated.