iPhone 5c no power - GSM-Forum

timvandenboo · 02-08-2016, 22:23

Hello everyone,

I have an iphone 5c that wont power on after removing both touch ic?
The iphone doesnt need these part to power up right?
Or does it?

Thanks in advance.

dog68 · 02-08-2016, 23:16

No it should power on, so what heat did you use? inspect the other ic's around, and other side of board. Test for short. Show me a picture of the board.

timvandenboo · 02-09-2016, 06:42

Thanks for your reply.

I use 350 degrees celcius to remove the components.
And protected the nand with shields + and iron coin on it.

I don't see any heat spots in the board and there is no short to ground...

I did accidently remove 2 caps (1 between the U12 and U15) and the other one next to the u15 ( side)

I will add the names in a minute through schematics.
But I don't think they should affect it.

timvandenboo · 02-09-2016, 07:10

Here are the names of the caps that are removed:
C150
C165
C79

I will make a picture of the board tonight.

PS. I just think that i made short to ground with R86. (but there is no ''beep' on + -)

HDccam · 02-09-2016, 07:43

The beep function sends 3 volts into your board. It can damage your ic's. Its better to use ohm to check shotcuts

timvandenboo · 02-09-2016, 08:48

Quote:

Originally Posted by HDccam

The beep function sends 3 volts into your board. It can damage your ic's. Its better to use ohm to check shotcuts

Thanks for your reply and advice.
But i dont think that is the problem.

Because i didnt check the short before. (only after the phone wasnt booting anymore)

I will check the short from R86 tonight. Hopefully that will fix the problem

dog68 · 02-09-2016, 16:34

Quote:

Originally Posted by HDccam

The beep function sends 3 volts into your board. It can damage your ic's. Its better to use ohm to check shotcuts

3 volts damage these ic's? no it wont. what makes you think that it would pass 3 volts at continuity testing?

dog68 · 02-09-2016, 16:36

Quote:

Originally Posted by timvandenboo

Thanks for your reply.

I use 350 degrees celcius to remove the components.
And protected the nand with shields + and iron coin on it.

I don't see any heat spots in the board and there is no short to ground...

I did accidently remove 2 caps (1 between the U12 and U15) and the other one next to the u15 ( side)

I will add the names in a minute through schematics.

But I don't think they should affect it.

350 Is too much. 250 max i would say. depends on your station.

timvandenboo · 02-09-2016, 16:45

Quote:

Originally Posted by dog68

350 Is too much. 250 max i would say. depends on your station.

Thanks for the reply.

I dont see any damage or short so fare.

Maybe i then destroyed the U1......

any suggestions to measure some spots on the board (voltages etc.?)

timvandenboo · 02-09-2016, 16:55

nik001 · 02-09-2016, 19:50

why you desolder the components?

qwertybasse · 02-09-2016, 22:03

the pc can recognize it ?

timvandenboo · 02-10-2016, 17:42

Quote:

Originally Posted by qwertybasse

the pc can recognize it ?

Saidly no detection in itunes.

qwertybasse · 02-10-2016, 18:01

then its not the nand memory. Reball the 2 ic for backlight

timvandenboo · 02-11-2016, 07:18

Quote:

Originally Posted by qwertybasse

then its not the nand memory. Reball the 2 ic for backlight

Can the backlight ic cause an internal short or something then?

You mean btw with the 2 ic's U3 , L3 or something else?

Thank for the reply btw.

02-08-2016, 22:23	#1 (permalink)
timvandenboo Freak Poster Join Date: May 2013 Location: Netherlands Posts: 376 Member: 1939450 Status: Offline Thanks Meter: 165	iPhone 5c no power Hello everyone, I have an iphone 5c that wont power on after removing both touch ic? The iphone doesnt need these part to power up right? Or does it? Thanks in advance.

02-09-2016, 07:10	#4 (permalink)
timvandenboo Freak Poster Join Date: May 2013 Location: Netherlands Posts: 376 Member: 1939450 Status: Offline Thanks Meter: 165	Here are the names of the caps that are removed: C150 C165 C79 I will make a picture of the board tonight. PS. I just think that i made short to ground with R86. (but there is no ''beep' on + -) Last edited by timvandenboo; 02-09-2016 at 07:17.

02-08-2016, 23:16	#2 (permalink)
dog68 No Life Poster Join Date: Mar 2012 Location: cambridgeshire, England Age: 55 Posts: 760 Member: 1728699 Status: Offline Thanks Meter: 212	No it should power on, so what heat did you use? inspect the other ic's around, and other side of board. Test for short. Show me a picture of the board.

02-09-2016, 06:42	#3 (permalink)
timvandenboo Freak Poster Join Date: May 2013 Location: Netherlands Posts: 376 Member: 1939450 Status: Offline Thanks Meter: 165	Thanks for your reply. I use 350 degrees celcius to remove the components. And protected the nand with shields + and iron coin on it. I don't see any heat spots in the board and there is no short to ground... I did accidently remove 2 caps (1 between the U12 and U15) and the other one next to the u15 ( side) I will add the names in a minute through schematics. But I don't think they should affect it.

02-09-2016, 07:43	#5 (permalink)
HDccam No Life Poster Join Date: Mar 2012 Location: Amsterdam, Netherlands Posts: 754 Member: 1732818 Status: Offline Thanks Meter: 532	The beep function sends 3 volts into your board. It can damage your ic's. Its better to use ohm to check shotcuts

02-09-2016, 16:55	#10 (permalink)
timvandenboo Freak Poster Join Date: May 2013 Location: Netherlands Posts: 376 Member: 1939450 Status: Offline Thanks Meter: 165

02-09-2016, 19:50	#11 (permalink)
nik001 Junior Member Join Date: Feb 2016 Posts: 24 Member: 2529207 Status: Offline Thanks Meter: 5	why you desolder the components?

02-09-2016, 22:03	#12 (permalink)
qwertybasse Freak Poster Join Date: Mar 2014 Posts: 195 Member: 2142442 Status: Offline Thanks Meter: 53	the pc can recognize it ?

02-10-2016, 18:01	#14 (permalink)
qwertybasse Freak Poster Join Date: Mar 2014 Posts: 195 Member: 2142442 Status: Offline Thanks Meter: 53	then its not the nand memory. Reball the 2 ic for backlight