I am having the same issues.

Phone not always charging, never while on, only sometimes when off

Orange LED staying on even when charger is diconnected

Phone starting up ond shuting down by itself

If I can get the phone on and connect the usb to Mass storage, when usb is disconnected, it still displays usb icon in the status bar and will not let me turn the phone off. It says it is still conected to a PC and to discounect it first.

I have tried re flashing the phone and it does not fix the problem.

Has anyone had any luck?