IPad air 2 no power on

[Biggtechman]

Hello I have a ipad air 2 come in.
Not charging and not turning on.

It was sucking .01ma to.00ma on and off.
I swapped tristar and it still doing the same thing.

anyway I found heat on u8650 nd had a quick look around at the caps.
they were fine.
so I removed u8650 which did not remove the short.

I found the short on the other side of nand on a cap.

My question is. U8650 is a usb charging controller which I assume works with tristar.

I can't find any data sheet on it and I can't put it back on.
Can I jump McClain to the 3v3 line on pin 5 and 6
and what about pin 2 which is a 1v8 switch line.

Any help is appriciated

Thanks

 

[JohnB8812]

This is NOT a MacBook...probably better to post this on a different section..Why did you replace Tristar to begin with was it bad on a Tristar tester or something??? Weird for U8650 to get hot unless you have a short on a line that goes to it...put U8650 back. Do you have a short on PPVCC_MAIN or PP3v3_S2R?

 

[Biggtechman]

Sorry about that, wasn't sure where to post.

Short was on pp3v3_ext_sw
I removed the short, it was c1842
I can not put u8650 back on as it got damaged on removal.

I'm just wanting to see if it's worth ordering that chip.
Figured that u8650 was a bridge, so was looking to find out what I can jump so the ipad would turn on.

I've read slot about pmic on ipad air 2 dying and not worth fixing.
so I would like to avoid wasting anymore time and coin on it.

It showed symptoms of tristar failure.

 

[JohnB8812]

If that line was short, it is unlikely the PMIC is bad. That can happen but I doubt it in this case. Pull U8650 from a dead donor iPad if possible

 

[Biggtechman]

Thanks for info, don't have doner board.
will order one.