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James
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Loose Battery Terminal causing apple logo boot loop?

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Hi

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?

Thanks

J

Edited by: James ( )

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Florida iDoctor
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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...CRITICAL) that and solder pad repair be correctly repaired. To do so, you will need to REPLACE each missing solder pad. The new solder pad will then be resoldered to the trace. You can achieve this by carefully removing the top layer of the trace until you see the exposed copper. You can now resolder the pad tail to the trace.

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.

Rick

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Darren
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Hi,

Do you have a guide which explains / shows what to solder? I live in the UK and need to repair an iPhone 4. All 4 legs have been detached from the main board when the battery was removed. The solder pads are intact and I can power the phone up if I line up the pins and push the connector down with my finger.

I have done some soldering in the past and wondered what equipment is needed?

TIA

Darren

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tushmanluuu
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i had the same problem ,since the pads

looking intact i soldered them but

i have charging problem and rebooting

my question is whether some pads are

detached or battery is faulty,how can

test pads connection?pads solderes

looking good just 4th from top does not

look fine.

regards

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