I have just replaced my back housing on my iphone, started it up and it was fine... one minute later, it dies in the arse, i try and turn it on again but it doesn't turn on unless it is plugged into the wall charger (usb does not register), and when it does turn on, it stays on the apple logo for 10 seconds and dies again. it was charged before I replaced the housing, and I can't get it into recovery mode or anything, because it shuts off as soon as I unplug the USB and connect to the PC. I then have to reset the phone again (connected to power).
So, tried DFU mode, iTunes doesn't detect it. Also, and very quiet, high pitched squeal is coming from the back of the phone, is this just my iphone or do they all do it, but I simply haven't noticed before? I have thought of trying to find a USB dock with a seperate power supply but now sure if they exist of if this will help.
Determined to fix this as I think the phone is great, if only Apple can sort out the battery life issues!
Hope someone can help.
I am willing to crack open the iphone again and do whatever inside, as long as I'm not wasting money buying parts that won't fix it..