Loose Battery Terminal causing apple logo boot loop?
I did some repairs on my i4 the other day and when I removed the battery, the battery terminal lifted up from the board (although it still looks attached to the 4 solder points)
The battery was also faulty so I have removed it, Now when I try to power the phone from mains it turns on properly and shows the 'Connect to iTunes' screen, however when powering through USB the apple logo comes on for a few seconds before restarting and looping.
Is this due to the battery terminal coming loose? if so do I need to just redo the soldering for the 4 pins? or do the 2 circular pins under the terminal do anything apart from hold the terminal to the board?
Hi James -
Good question. In our experience, this looping is caused by a battery connector terminal that is lifted from the pads (and not making a proper circuit). It may be that either one of the pads lifted under the connector terminal OR it could be that the connector terminal has a cracked lead (from the leg down to the pad).
We see this issue every day in our shop. We regularly repair these iPhone damaged battery connector terminals.
The solder pads, under the connector terminal, have a tail that comes off of the pad and connects in to the trace. It is CRITICAL (I REPEAT...CRITIC
Contact us if you need assistance or have further questions. We have over a 91% success rate of repairing these missing damaged pads and traces on the iPhone 4 and iPhone 4S.