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Released September 16, 2016. Models A1661, A1784, and A1785. Available in 32, 128, or 256 GB configurations in Rose gold, gold, silver, black, jet black, and (Product)Red.

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logic board question, any ideas?

A customer brought in an iphone 7 plus that was thrown against a wall. it had a bad lcd but could still see that the phone wouldnt boot past apple logo. now that i have the screen replaced it still stuck at apple logo and im trying to figure it out. customer has data backed up on icloud so 1st thing i tried was to restore/update in itunes. unfortunately i got error 9 every time. also if the phones off and i plug in the charger it will draw .8 amp until i unplug the charger and plug it back in. then no amp draw. im thinking tristar is the problem but not sure because there in physical damage on the heatshield of the board, where it got some small dents from the screws that clip into the frame of the screen. but its not near tristar. ill add some pics of the damage i can see.

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Error 9 is usually related to bad cables. Considering the phone was physically damaged, it could be a problem with the charge port or the Tristar circuit. I wouldn't rely too much on visual cues to determine logic board damage. That kind of physical impact can create all kinds of broken solder connections pretty much anywhere on the board. It may have many problems beyond what you are currently seeing.

You'll need to remove the shields to inspect and probe it.

You may want to warn the customer and also prepare yourself mentally for a rabbit-hole.

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You beat me to the first answer haha

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Also on the second picture the solder holding the sheild on is cracked so it was probably hit pretty hard.

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Have you reballed anything yet? First try to replacing the tristar, if that doesn't work try reballing the NAND and if that fails Reball the CPU.

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Hey giga...reballing the CPU is BIG LEAGUE stuff. I've seen videos showing it (I've never tried it myself) but it's hard to say if the actual reballing really worked because these videos are heavily edited. That's not to say I don't believe it can be done but it's certainly not for the non-experts.

I wouldn't throw that recommendation around unless I'm certain the OP is highly experienced...and if they were, they wouldn't be asking questions here ;>).

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@refectio I was actually reballing a 5s CPU about 20 minutes ago haha

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Did it work? I'll gladly retract my comment if I'm wrong.

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@refectio i don't know, I took it off of a dead board and so far it looks good.

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@gigabit87898 , Reballing a 5s CPU, Please let us know if it was a success!

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lukerockhill will be eternally grateful.
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