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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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iPhone 4 screen flash's and phone restarts after 3minutes 6seconds

I recently bought a 2nd hand iPhone with a cracked screen only to find out had allready been opened up water damaged and missing the speaker at the bottom and the vibrator and all component covers ( i think thats all thats missing (see picture) )

I fixed the screen myself then put everything back together but acidently broke off battery connector on motherboard an when I try'd to restore with iTunes had 1611 error then soldered battery back on and it restored succesfully

Now when I turn it on it will always restart after around 3 minutes 6 seconds (went into stopwatch always around 3.03.7 so allowing for time to get into it)

And also when sim is in it will show 1 bar for a second but no network name then no service.(sim is fine works in my other iPhone 4) and don't think it's an overseas iPhone.

tryed restoring it a few times and even tryd jailbreaking it thinking it might help but no luck

Any help greatly appreciated thanks

IPhone 4 16gb

Ios4.3.5 not jailbroken

Modem firmware 4.10.01

No corrosion that I can see but sticker on motherboard is pink

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My initial guess would be that the logic board is shot but I'm not 100% confident. Combination of relatively normal operation until reset, the fact that someone has already been through the phone and a tripped water sensor make me lean towards my guess.

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where can i get a new logic board from?

also wouldi be able to put a 32gb one in instead of the 16gb which is in there at the moment?

are they both compatible with everything else in the phone?

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Sorry I dropped the ball on this one.

We unfortunately do not sell the logic board and I haven't heard of any reliable sources for logic boards...and the prices that I have seen on sites are REALLY high. You're best bet may be to find another second hand phone w/a good board, if you can verify, and try swapping? Hope something works out for you!

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i think the problem here could be your battery. maybe this is the same waterdamaged battery and it hasn't been changed? the other choice is the power ic which sometimes resets clocks/timers/alarms etc when it goes. is the inside clean or is there corrosion? you could try cleaning the phones insides again with isopropyl alcohol and a soft brush to really get in and around the connections.. it may help. It might be cheaper than a new logic board and you have nothing to lose. I'd clean first, buy the battery and then re evaluate... good luck

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