iPhone diagnosis, anyone?

LifelineIT

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I'm pretty much out of the business of mobile repairs at this point, but a friend asked me for a favor and like a big stupid dummy, I agreed. He and his wife just upgraded from iphone 4's (That's iphone 4 in plural, NOT 4s) and want to give the old phones to their kids as toys. The wife's phone had a broken screen. His phone had a mostly busted power button and the home button didn't work well. The husband is a buddy of mine so, like a dummy, I didn't charge them very much at ALL. (Like parts + $15)

My first stupid mistake is that I don't actually have a charger for these devices. His worked-ish save for the power buttons. Hers, no idea if it worked, the screen was shattered.

Opened his, it was full of gross. Didn't actually replace anything, but I did disassemble as I was getting the gunk out. The little rubber nub on the power button was basically gone, thus the power button not wanting to work. I checked that it came back on and didn't charge him anything for the repair. His wife's phone was just a screen swap. A pain on a 4, but nothing out of the ordinary. It never powered on before the swap (no charger!) so I just dropped them off and called it done. He calls me the next day to tell me that they're both DOA.

Here's the weird part: his phone comes on fine but ONLY the dead middle of the screen works. Like a stripe across the middle. I can't reset it, I can't enter DFU mode, because A) no power button and B) the "confirm" button is just outside the part of the screen that works. I ordered a new power button but have not installed. I've septuple checked the connection inside, it's tight and no pins appear out of order or anything less than perfect. The question here is...will swapping the power button and doing a DFU clear have any probability of fixing the issue?

His wife's phone doesn't turn on, doesn't do anything. If you leave it plugged in for about 5 minutes, it will start making a slight vibration and chime every ~20 seconds or so. The screen will not turn on, there is no otherwise indication of power, plugging it into the PC does nothing. Like I said, no idea if it worked before I got it. I've tried disconnecting and reconnecting the battery with no success. Any ideas on this one AT ALL? Normally I'd have confirmed that it worked a little bit at least before I took it...but...you know, friends and all.

Now I'm suspecting that I'm going to be buying them two new (used) 4's for a job that wasn't gonna make me any money anyway. I really don't think this guy would intentionally try to get me to swap a screen on a dead phone or anything, just bad luck. Later today I'll disassemble both and try putting the opposite screens in place and see what happens. Any suggestions would be appreciated.
 
If you are just doing the guy a favor then hand them back and just tell him that once you go them open you found out that they are too badly damaged to be worth it. Why are suddenly on the hook for junk phones?
 
Well, I thought about that, but his screen worked before I took it. I'm on the hook for that one for sure, although from what I read the 4's get persnickety about working after the screen has been disconnected sometimes, thus me wondering if DFU mode will work. The second one...well, that's the one he technically paid for a fix for. I mean when he gave them to me he had one usable and one not. Now he has two unusable and he's out some cash.
 
Make sure you're screws on the cover over those connections in the upper left hand corner are all in the right spot... Seen plenty where too long of a screw was put in the wrong spot... It'll cause lots of issues.
I'd recommend disconnecting his screen and connecting another to see if that works. You only have to remove the metal cover. ALWAYS do this as it saves a lot of work if it's a doa screen or like the wife's unit a dead one. Does hers show in iTunes? Possible you have a defective screen?
 
Make sure you're screws on the cover over those connections in the upper left hand corner are all in the right spot... Seen plenty where too long of a screw was put in the wrong spot... It'll cause lots of issues.
I'd recommend disconnecting his screen and connecting another to see if that works. You only have to remove the metal cover. ALWAYS do this as it saves a lot of work if it's a doa screen or like the wife's unit a dead one. Does hers show in iTunes? Possible you have a defective screen?
Thanks. They definitely all went back where they came from but I'll check that again too. A DOA screen isn't likely but of course it's possible, but no it shows NOT AT ALL when connected to a PC, which is why I wasn't suspecting the screen.
 
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