Discuss [Advice] iPhone without any response : Battery issue ? Comm board dead ? at the Hardware - Hackint0sh.org; I have a 2G that when I woke up in the morning it was dead, ...
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I have a 2G that when I woke up in the morning it was dead, No start no how. I opened up and tested that the battery and it does charge and seeing the voltage climb on the battery when plugged in but won't start up.
I read in another post by one of the experts, to unplug the comm board and battery and then connect the phone to wall power and if the logic board is good, you will see the apple logo for a couple of seconds and then the phone will turn off. If you don't see the apple logo, the logic board is hooped. The apple logo does not come on and my phone is still dead after that test.
Is this a valid test? Would it be the logic board?
Last edited by kidster; 07-01-2009 at 08:36 AM.
I have an iphone 2g... The screen was broken so i replaced the lcd and the glass. when i was prying the battery up the first time I nicked the edge of the flex/ribbon cable that goes behind the lcd (the one for charging, mic, speaker, home button) When i assembled the phone after the screen replacement the home button wasn't working (everything else was though) so I purchased the flex cable. I was replacing that cable and when i was de-soldering the mic i broke off one of the pins so i ordered a new microphone. I finally got the mic today and I soldered it on and put everything back together. Now when i try and turn the phone on nothing happens. If i plug it into the wall charger it will power up to the apple logo and then shut off. If i continue to try and power it up it eventually shows the charging screen with the little lightning bolt under it and just stays on this screen. I tested the voltage when the phone was unplugged and plugged in
Unplugged it had 0.02v from red and the same for white.
Plugged in it had 2.44v from red and 2.00v from white.
Should the voltage not be higher when charging? Is the flex cable i just put in bad? I have ho idea what happened because the phone worked fine before it was apart and it has just sat disassembled in a drawer for a few weeks.
Thanks to this thread (francis1986) I managed to get some life back out of my iPhone..
Charging the iphone overnight resulted in the iphone not powering up in the morning. When connected to the pc it did not connect to itunes, even in DFU mode.
I removed the battery as it was reading 0.02v and used a nokia battery in the meantime. This powered up the iphone fine and it functioned as normal except for not being bale to be charged via mains or detected via USB. Any ideas on the problem? I'm guessing comms board?
I also bridged what i think was the correct point using the instructions francis1986 had given on the thread but to no avail.
iPhone 2g battery not charging
I just replaced my logic board because my old one was fried. I went ahead and replaced the battery too since it was open. Now after replacing it, when i try to charge my phone, its stuck on the lightning bolt charging screen. It does not go beyond that. I've left the phone plugged in for about an hour now. Any suggestions on how to fix it?
I am having a prob with the WHITE wire to the battery. Its pad is missing. Where can I jump the WHITE wire? Thanks.
Originally Posted by martano
I've read every post in this thread and am still not 100% as to which is the solution to my problem...Also, the pictures of the jumper fixes are extremely low res, does anyone have a high res image?
I recently managed to crack my iphone glass so decided to replace it, that wasn't a problem, and so while it was apart, I decided to replace the battery also.
Everything seemed fine and the phone turned on and worked for a day until it ran out of charge.
So I connected it to the mains and it vibrates, the display says it's charging, but it doesn't actually accept any charge.
Even leaving overnight wouldn't do anything.
I took the back off and measured the voltages that are being put out by the logic board.
Not on charge, just switched on:
Black --> Red = 4v
Black --> white = 0v
Switched on, on charge:
Black --> Red = 4v
Black --> White = 5v
So the weird thing is that the logic board is dishing out 5v to the battery, but the battery doesn't appear to be taking any charge?
Are the above voltages correct, and if so, why won't the battery hold/receive any charge?
Anyway, I thought maybe it was a duff battery so bought another one and have exactly the same problem, and voltage readings
Any answers will be MUCH appreciated. Currently the iphone is plugged into the wall on 85% so as not to lose any charge/completely brick on me!
I've also restored the iPhone back to 3.0, and even to 2.0 and it doesn't solve the problem. Everything else on the phone works (calling/wifi/bluetooth etc)
so has anyone gotten the red wire jumper to work yet??
ive tried and it didnt work...maybe i did something wrong??
I know its a long shot, but my 2G Iphone has the symptoms that francis1986 suggests of a non charging battery but a semi functional Iphone.
I would like to try the bridge suggested in francis1986's post, but the link is dead to the image.
Anyone got the image or will to describe the bridge for a 2g logic board.
Does anybody has the picture where you have to jump the commboard? I really need to verify that the comm board is ok how can you test it?
Originally Posted by Internetpig
white soldering pad gone
I'm having the same problem and the connection to the 6th pin on the comm board is too tiny! Making the job really hard.
Originally Posted by ShreddinPB
Is there any other way to jump the white wire?
EDIT: My phone shows the apple logo when connected, and in 5 sec it turns off.
Last edited by fech; 04-30-2010 at 08:25 PM.
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