iPhone X PP GPU short - GSM-Forum

MonkeyRiver · 05-06-2019, 18:12

ok. I have seen this twice now. That last one was a bad A11

I have a iphone X with a PP GPU short All the caps on that rail are low ohms.

Is this a signature fail?
Last time I started pulling caps one at a time until there were none left. Then pulled PMIC then the A11. The short went away with the A11.

MonkeyRiver · 05-07-2019, 15:35

Anyone?

Is there a highly active forum for micro solder technicians.. ?
I find some info here but it is sparse.

MonkeyRiver · 05-07-2019, 23:01

Using thermal imaging "I figured out a more precise method for my Flir" using a iPad as the display and using a lens distance of less than 3".

I am 100 % positive this is a A11 chip as well.
How the hell do you fix this?

To see a video of the FLIR as the board powers on visit my youtube channel.
kcmicrotronix The name of the video is "iPhone X PP GPU short"

MonkeyRiver · 05-08-2019, 16:37

I am officially pulling the plug on the repair and calling it a defective A11.
no reparable.

josuecas · 11-26-2021, 04:16

Check this video, i hope it helps.

https://www.youtube.com/watch?v=RBA7sYub8mI

josuecas · 11-26-2021, 04:17

Check this video, i hope it helps.

https://www.youtube.com/watch?v=RBA7sYub8mI

josuecas · 11-26-2021, 04:17

Check this video, i hope it helps.

https://www.youtube.com/watch?v=RBA7sYub8mI

josuecas · 11-26-2021, 04:18

check this video, i hope it helps .
https://www.youtube.com/watch?v=RBA7sYub8mI

josuecas · 11-26-2021, 04:18

check this video, i hope it helps .
https://www.youtube.com/watch?v=RBA7sYub8mI

josuecas · 11-26-2021, 04:19

check this video, i hope it helps .
https://www.youtube.com/watch?v=RBA7sYub8mI

elecsoluces · 11-29-2021, 14:18

Hello,

PP_GPU is a very low value in resistance/diode mode, are you sure you're facing a short on that line?
I have an iphone X that is booting normaly, the value for this line is 4.5 ohm.

05-06-2019, 18:12	#1 (permalink)
MonkeyRiver Major Poster Join Date: Jan 2019 Location: Kansas City Posts: 42 Member: 2891996 Status: Offline Thanks Meter: 6	iPhone X PP GPU short ok. I have seen this twice now. That last one was a bad A11 I have a iphone X with a PP GPU short All the caps on that rail are low ohms. Is this a signature fail? Last time I started pulling caps one at a time until there were none left. Then pulled PMIC then the A11. The short went away with the A11.

05-07-2019, 15:35	#2 (permalink)
MonkeyRiver Major Poster Join Date: Jan 2019 Location: Kansas City Posts: 42 Member: 2891996 Status: Offline Thanks Meter: 6	Anyone? Is there a highly active forum for micro solder technicians.. ? I find some info here but it is sparse.

05-07-2019, 23:01	#3 (permalink)
MonkeyRiver Major Poster Join Date: Jan 2019 Location: Kansas City Posts: 42 Member: 2891996 Status: Offline Thanks Meter: 6	Using thermal imaging "I figured out a more precise method for my Flir" using a iPad as the display and using a lens distance of less than 3". I am 100 % positive this is a A11 chip as well. How the hell do you fix this? To see a video of the FLIR as the board powers on visit my youtube channel. kcmicrotronix The name of the video is "iPhone X PP GPU short"

05-08-2019, 16:37	#4 (permalink)
MonkeyRiver Major Poster Join Date: Jan 2019 Location: Kansas City Posts: 42 Member: 2891996 Status: Offline Thanks Meter: 6	I am officially pulling the plug on the repair and calling it a defective A11. no reparable.

11-26-2021, 04:16	#5 (permalink)
josuecas Insane Poster Join Date: Mar 2011 Location: Tegucigalpa Posts: 70 Member: 1532131 Status: Offline Sonork: LabCell Thanks Meter: 7	Check this video, i hope it helps. https://www.youtube.com/watch?v=RBA7sYub8mI

11-26-2021, 04:17	#6 (permalink)
josuecas Insane Poster Join Date: Mar 2011 Location: Tegucigalpa Posts: 70 Member: 1532131 Status: Offline Sonork: LabCell Thanks Meter: 7	Check this video, i hope it helps. https://www.youtube.com/watch?v=RBA7sYub8mI

11-26-2021, 04:17	#7 (permalink)
josuecas Insane Poster Join Date: Mar 2011 Location: Tegucigalpa Posts: 70 Member: 1532131 Status: Offline Sonork: LabCell Thanks Meter: 7	Check this video, i hope it helps. https://www.youtube.com/watch?v=RBA7sYub8mI

11-26-2021, 04:18	#8 (permalink)
josuecas Insane Poster Join Date: Mar 2011 Location: Tegucigalpa Posts: 70 Member: 1532131 Status: Offline Sonork: LabCell Thanks Meter: 7	check this video, i hope it helps . https://www.youtube.com/watch?v=RBA7sYub8mI

11-26-2021, 04:18	#9 (permalink)
josuecas Insane Poster Join Date: Mar 2011 Location: Tegucigalpa Posts: 70 Member: 1532131 Status: Offline Sonork: LabCell Thanks Meter: 7	check this video, i hope it helps . https://www.youtube.com/watch?v=RBA7sYub8mI

11-26-2021, 04:19	#10 (permalink)
josuecas Insane Poster Join Date: Mar 2011 Location: Tegucigalpa Posts: 70 Member: 1532131 Status: Offline Sonork: LabCell Thanks Meter: 7	check this video, i hope it helps . https://www.youtube.com/watch?v=RBA7sYub8mI

11-29-2021, 14:18	#11 (permalink)
elecsoluces Major Poster Join Date: Feb 2018 Location: FRANCE Posts: 45 Member: 2816075 Status: Offline Thanks Meter: 8	Hello, PP_GPU is a very low value in resistance/diode mode, are you sure you're facing a short on that line? I have an iphone X that is booting normaly, the value for this line is 4.5 ohm.