ipad 4 no power no recognise - GSM-Forum

kaptanci · 04-15-2015, 20:45

Hi
I received an ipad 4 gsm with no power no dfu mode nothing. as i connect to power supply it shows 0.05 power consuption. And stay there. nothing happens. I measured all voltage they are all ok. I dont think it is pmu. I tried reheating nand 230 c but still same. itunes no detect. Do you think i have to reball nand? What can couse this problem.

Mommyfixit · 04-21-2015, 08:00

same problem. I changed U2 and still same.
Device was unopened.
Any thoughts?

iunxing · 04-21-2015, 08:06

same problem. thanks

kaptanci · 04-21-2015, 08:19

I removed yesterday nand ic. Today im going to reball i tell u if it works

kaptanci · 04-21-2015, 17:44

reballed nand but still same problem no life no recognise. all voltage ok. maybe it is cpu. device is clean everywhere no water not opened. im gonna return back to customer.

kaptanci · 05-02-2015, 19:57

Now another ipad 4 same problm. Nobody has any idea?

calais250 · 07-26-2015, 14:53

Hi
did you fix this problem?, if so can you please post solution
thank you

kaptanci · 07-27-2015, 06:06

Hi
I removed nand ic device recognised in dfu mode.
I put on a nand ic from iphone 5 device recognised but error 4013.
With original nand device dead nothing happens. I think it is faulty nand ic.
Maybe u have other problm.

calais250 · 07-27-2015, 09:04

i heated nand ic with 350C for 30 seconds and it works, the ipad had password lock so i tried restoring but now error 14
will try and download from another source, iclarified

calais250 · 07-27-2015, 12:23

tried a new restore now, ipad freezes during restore process
no error, has anyone have any ideas
what it might be?

kaptanci · 07-27-2015, 20:50

U have to reball nand to solve this. Heating is not a solution. I heated many times and customer come always back.

sasan500 · 07-27-2015, 23:07

its either U2 ic or power ic
I fixed a dead phone with replacing power ic
try it maybe it works for u too!!

calais250 · 07-28-2015, 14:12

It freezes when it is preparing ipad for restore so i think reballing nand IC is a good option for now

kaptanci · 07-28-2015, 19:32

Quote:

Originally Posted by sasan500

its either U2 ic or power ic
I fixed a dead phone with replacing power ic
try it maybe it works for u too!!

I not know really if it is u2 it would boot with a fully charged battery i think if it was u2. All voltage exist if i press power key so it cannot be pmu. I had 5 ipad 4 with same problm. I still have 3 the customer gave them to me. If i have time im gonna try replace both u2 and then pmu. I hope it works. Thanks for ur suggestion.

calais250 · 07-28-2015, 23:47

I tried last night to remove the nand ic but couldn't remove it too much black epoxy
so left it for now, but i replaced the U2 ic and still the same, keeps freezing now waiting for ipad on itunes, so I am sure it is the nand ic
i tried my best to cleaned as much black crap around the nand ic, but it still does not lift out, how much heat do you recommend?

04-15-2015, 20:45	#1 (permalink)
kaptanci Freak Poster Join Date: Nov 2014 Location: Germany Posts: 265 Member: 2289832 Status: Offline Thanks Meter: 48	ipad 4 no power no recognise Hi I received an ipad 4 gsm with no power no dfu mode nothing. as i connect to power supply it shows 0.05 power consuption. And stay there. nothing happens. I measured all voltage they are all ok. I dont think it is pmu. I tried reheating nand 230 c but still same. itunes no detect. Do you think i have to reball nand? What can couse this problem.

04-21-2015, 08:00	#2 (permalink)
Mommyfixit Junior Member Join Date: Aug 2013 Posts: 16 Member: 2012593 Status: Offline Thanks Meter: 4	same problem. I changed U2 and still same. Device was unopened. Any thoughts?

04-21-2015, 08:06	#3 (permalink)
iunxing Junior Member Join Date: Jan 2010 Posts: 1 Member: 1210561 Status: Offline Thanks Meter: 0	same problem. thanks

04-21-2015, 08:19	#4 (permalink)
kaptanci Freak Poster Join Date: Nov 2014 Location: Germany Posts: 265 Member: 2289832 Status: Offline Thanks Meter: 48	I removed yesterday nand ic. Today im going to reball i tell u if it works

04-21-2015, 17:44	#5 (permalink)
kaptanci Freak Poster Join Date: Nov 2014 Location: Germany Posts: 265 Member: 2289832 Status: Offline Thanks Meter: 48	reballed nand but still same problem no life no recognise. all voltage ok. maybe it is cpu. device is clean everywhere no water not opened. im gonna return back to customer.

05-02-2015, 19:57	#6 (permalink)
kaptanci Freak Poster Join Date: Nov 2014 Location: Germany Posts: 265 Member: 2289832 Status: Offline Thanks Meter: 48	Now another ipad 4 same problm. Nobody has any idea?

07-26-2015, 14:53	#7 (permalink)
calais250 Freak Poster Join Date: Oct 2011 Posts: 177 Member: 1668980 Status: Offline Thanks Meter: 35	Hi did you fix this problem?, if so can you please post solution thank you

07-27-2015, 06:06	#8 (permalink)
kaptanci Freak Poster Join Date: Nov 2014 Location: Germany Posts: 265 Member: 2289832 Status: Offline Thanks Meter: 48	Hi I removed nand ic device recognised in dfu mode. I put on a nand ic from iphone 5 device recognised but error 4013. With original nand device dead nothing happens. I think it is faulty nand ic. Maybe u have other problm.

07-27-2015, 09:04	#9 (permalink)
calais250 Freak Poster Join Date: Oct 2011 Posts: 177 Member: 1668980 Status: Offline Thanks Meter: 35	i heated nand ic with 350C for 30 seconds and it works, the ipad had password lock so i tried restoring but now error 14 will try and download from another source, iclarified

07-27-2015, 12:23	#10 (permalink)
calais250 Freak Poster Join Date: Oct 2011 Posts: 177 Member: 1668980 Status: Offline Thanks Meter: 35	tried a new restore now, ipad freezes during restore process no error, has anyone have any ideas what it might be?

07-27-2015, 20:50	#11 (permalink)
kaptanci Freak Poster Join Date: Nov 2014 Location: Germany Posts: 265 Member: 2289832 Status: Offline Thanks Meter: 48	U have to reball nand to solve this. Heating is not a solution. I heated many times and customer come always back.

07-27-2015, 23:07	#12 (permalink)
sasan500 No Life Poster Join Date: May 2015 Location: Los Angeles Posts: 544 Member: 2398349 Status: Offline Thanks Meter: 62	its either U2 ic or power ic I fixed a dead phone with replacing power ic try it maybe it works for u too!!

07-28-2015, 14:12	#13 (permalink)
calais250 Freak Poster Join Date: Oct 2011 Posts: 177 Member: 1668980 Status: Offline Thanks Meter: 35	It freezes when it is preparing ipad for restore so i think reballing nand IC is a good option for now

07-28-2015, 23:47	#15 (permalink)
calais250 Freak Poster Join Date: Oct 2011 Posts: 177 Member: 1668980 Status: Offline Thanks Meter: 35	I tried last night to remove the nand ic but couldn't remove it too much black epoxy so left it for now, but i replaced the U2 ic and still the same, keeps freezing now waiting for ipad on itunes, so I am sure it is the nand ic i tried my best to cleaned as much black crap around the nand ic, but it still does not lift out, how much heat do you recommend?