iphone won't turn on need help please

[gees68]

Hi everyone

I have an iphone 3g on 3.1.3 or 3.1.2 jailbroken and unlocked the screen is black and it won't do anything.

When pluged to the wall and hold power botton apple logo will apear,if I hold power and home botton the screen goes black.
Then if I hold both bottons again apple logo comes back and if I don't let go after 15 sec. recovery screen apears and stays on until I unplug from the wall and it goes black.

When I plug to my pc nothing the screen stays black but I can get it into dfu mode and itunes sees it,but when I want to restore ,it start and as soon as it wants to send info to phone it disconects.

I tried Ireb,redsn0w nothing it keeps on diconnecting.

Thanks

[gees68]

Wow did I stump everyone?
Anyways couldnt wait , went to see repairman main board was fried thanks anyway