iPhone 3G: Doesn't charge, doesn't start, but see charging screen - GSM-Forum

ZP1970 · 09-21-2012, 13:38

Here's something odd. This iPhone was given to me because it wouldn't charge. If you connect the charger cable, all you see is the charging icon:

No matter how long I let it charge, this image will not disappear and the iPhone will not charge. If I remove the charger cable, the image disappears.

But if I replace the empty battery with a charged battery, the phone won't start. All I see is a faint flickering of the screen.

So what is wrong?

Mesho N-BoX · 09-21-2012, 14:45

same problem with me now

kostelectronics · 09-21-2012, 17:13

Do you use an not original charger? Or itunes not installed on the pc?

air_chair256 · 09-21-2012, 17:44

maybe the battery not good try replace battery with original one

vazgsm · 09-21-2012, 17:58

@zp1960

with semi discharged batt (3.4 - 3.6v), it shows the 'need charging' screen when you press power button? was it water damaged?

ZP1970 · 09-21-2012, 20:02

Quote:

Originally Posted by air_chair256

maybe the battery not good try replace battery with original one

I've tried several (new) batteries. Same problem.

Quote:

Originally Posted by vazgsm

@zp1960

with semi discharged batt (3.4 - 3.6v), it shows the 'need charging' screen when you press power button? was it water damaged?

It will not power on without the charger cable (so only when I insert the charger cable does the iPhone turn on)

So:

NO charger cable, (almost) EMPTY battery:

NO charger cable, CHARGED battery:

Charger cable INSERTED, (almost) EMPTY battery:

Charger cable INSERTED, (semi) CHARGED battery:

vazgsm · 09-21-2012, 20:18

have you checked fuse´s voltage with charged batt? if it´s ok, did you check pmic surrounding voltages? and was it water damage? does it gets abnormally hot?

ZP1970 · 09-21-2012, 20:29

I'm not sure if it was water damaged. I do see a few oxidized spots on the mainboard:

vazgsm · 09-21-2012, 20:49

it´s surely liquid damage, pehaps water. but first thing of all, is to remove all oxidation from board. remove shields and clean it all up, then measure fuse´s and pmic voltages. pcb is shorted somewhere, may be in oxidized spots.

air_chair256 · 09-21-2012, 21:15

clean the board and replace all damaged part maybe when your iphone turn on the camera also not working any way after clean board replace the green fuse
iPhone_S1.jpg

ZP1970 · 09-21-2012, 23:50

I measured between ground and both sides of the green fuse and didn't measure anything (on a charged battery).

What should I measure?

vazgsm · 09-22-2012, 15:17

that green fuse is supposed to have same voltage as battery. if it shows 0v, it must be a broken line from batt connector v+ to other side of the board, so now you know where to begin.

sorry, but I can´t seem to understand why your board wasn´t cleaned up already. is the most important thing to do. get a toothbrush and some thinner, and rub it up till not a single oxidation spot can be seen anywhere on the board (even inside shields!). with oxidized phone, you can´t trust measures, as it may be the cause of the shortage.

br

vazgsm · 09-22-2012, 15:17

[ wrong duplicated message ]

ZP1970 · 09-22-2012, 20:26

Quote:

Originally Posted by vazgsm

sorry, but I can´t seem to understand why your board wasn´t cleaned up already.

It has already been cleaned. I just didn't feel like taking another picture just to show where I measured.

Quote:

is the most important thing to do.

Actually, you have to be very careful cleaning oxidation. An electronic component can be heavily oxidized - but still working. Cleaning it may destroy the component. I've had this happen to me quite a few times in the past.

Oxidation in itself isn't a problem. But it eats into the electronic component causing it to fail. So if a component doesn't work and it's oxidized, it won't start working all of a sudden when you remove the oxidation.

vazgsm · 09-23-2012, 16:04

Quote:

Originally Posted by ZP1970

Actually, you have to be very careful cleaning oxidation. An electronic component can be heavily oxidized - but still working. Cleaning it may destroy the component. I've had this happen to me quite a few times in the past.

Oxidation in itself isn't a problem. But it eats into the electronic component causing it to fail. So if a component doesn't work and it's oxidized, it won't start working all of a sudden when you remove the oxidation.

I disagree. oxidation makes shortages, and by your pictures, it´s clear that is the case. if a component is damaged, of course it won´t be fixed just by cleaning, but without cleaning, you can´t see the real damages. and it won´t fail just because you cleaned it (well, at least they don´t when I clean, dunno how you do it). an even if if does, if part gets destroyed, it was supposed to be replaced anyway.

never had problems for cleaning, they happen when pcb is not cleaned properly. how many phones began to work again simply by cleaning up the board, which proves the importance of it. when you keep powering oxidized boards, you risk to damage it even more. Something I NEVER do, is to power an oxidized board, but maybe it´s just me...

09-21-2012, 13:38	#1 (permalink)
ZP1970 Crazy Poster Join Date: Aug 2011 Posts: 59 Member: 1633386 Status: Offline Thanks Meter: 4	iPhone 3G: Doesn't charge, doesn't start, but see charging screen Here's something odd. This iPhone was given to me because it wouldn't charge. If you connect the charger cable, all you see is the charging icon: No matter how long I let it charge, this image will not disappear and the iPhone will not charge. If I remove the charger cable, the image disappears. But if I replace the empty battery with a charged battery, the phone won't start. All I see is a faint flickering of the screen. So what is wrong?

09-22-2012, 15:17	#13 (permalink)
vazgsm No Life Poster Join Date: Jan 2005 Location: root Posts: 758 Member: 111871 Status: Offline Sonork: 100.78975 Thanks Meter: 100	[ wrong duplicated message ] Last edited by vazgsm; 09-22-2012 at 15:23.

09-21-2012, 14:45	#2 (permalink)
Mesho N-BoX Freak Poster Join Date: Dec 2010 Location: FMI: clean / Sold by: TuNiSiA Age: 33 Posts: 480 Member: 1461329 Status: Offline Thanks Meter: 43	same problem with me now

09-21-2012, 17:13	#3 (permalink)
kostelectronics No Life Poster Join Date: Apr 2009 Location: Wikon, Switzerland Posts: 941 Member: 1012778 Status: Offline Thanks Meter: 245	Do you use an not original charger? Or itunes not installed on the pc?

09-21-2012, 17:44	#4 (permalink)
air_chair256 Freak Poster Join Date: Oct 2011 Posts: 338 Member: 1679608 Status: Offline Thanks Meter: 190	maybe the battery not good try replace battery with original one

09-21-2012, 17:58	#5 (permalink)
vazgsm No Life Poster Join Date: Jan 2005 Location: root Posts: 758 Member: 111871 Status: Offline Sonork: 100.78975 Thanks Meter: 100	@zp1960 with semi discharged batt (3.4 - 3.6v), it shows the 'need charging' screen when you press power button? was it water damaged?

09-21-2012, 20:18	#7 (permalink)
vazgsm No Life Poster Join Date: Jan 2005 Location: root Posts: 758 Member: 111871 Status: Offline Sonork: 100.78975 Thanks Meter: 100	have you checked fuse´s voltage with charged batt? if it´s ok, did you check pmic surrounding voltages? and was it water damage? does it gets abnormally hot?

09-21-2012, 20:29	#8 (permalink)
ZP1970 Crazy Poster Join Date: Aug 2011 Posts: 59 Member: 1633386 Status: Offline Thanks Meter: 4	I'm not sure if it was water damaged. I do see a few oxidized spots on the mainboard:

09-21-2012, 20:49	#9 (permalink)
vazgsm No Life Poster Join Date: Jan 2005 Location: root Posts: 758 Member: 111871 Status: Offline Sonork: 100.78975 Thanks Meter: 100	it´s surely liquid damage, pehaps water. but first thing of all, is to remove all oxidation from board. remove shields and clean it all up, then measure fuse´s and pmic voltages. pcb is shorted somewhere, may be in oxidized spots.

09-21-2012, 21:15	#10 (permalink)
air_chair256 Freak Poster Join Date: Oct 2011 Posts: 338 Member: 1679608 Status: Offline Thanks Meter: 190	clean the board and replace all damaged part maybe when your iphone turn on the camera also not working any way after clean board replace the green fuse iPhone_S1.jpg

09-21-2012, 23:50	#11 (permalink)
ZP1970 Crazy Poster Join Date: Aug 2011 Posts: 59 Member: 1633386 Status: Offline Thanks Meter: 4	I measured between ground and both sides of the green fuse and didn't measure anything (on a charged battery). What should I measure?

09-22-2012, 15:17	#12 (permalink)
vazgsm No Life Poster Join Date: Jan 2005 Location: root Posts: 758 Member: 111871 Status: Offline Sonork: 100.78975 Thanks Meter: 100	that green fuse is supposed to have same voltage as battery. if it shows 0v, it must be a broken line from batt connector v+ to other side of the board, so now you know where to begin. sorry, but I can´t seem to understand why your board wasn´t cleaned up already. is the most important thing to do. get a toothbrush and some thinner, and rub it up till not a single oxidation spot can be seen anywhere on the board (even inside shields!). with oxidized phone, you can´t trust measures, as it may be the cause of the shortage. br