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Final fix for Nexus 4 red light of death

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Hello i'll try to explain how i fixed the red notification light when my friend's phone died.
The situation was that he charged the phone from the car built in USB and after he unplugged the charger the phone never powered on.
I tried all the solutions that google search can provide and nothing helped.
The problem was that when you plug the charger the red light stays on without any blinks and nothing helped.

Tools you need:
*Torque screw T5 screwdriver
*Small Philips screwdriver (thanks scream4cheese for remind)
*Plastic handle or something else (to open the back cover without damage it)
*Thin wires
*old/new phone charger

So lets start - hope it will help some one that stuck in this situation
1. First of all you need to remove the back cover to get access to the battery.

2. Unscrew the 2 screws that holds the battery flex cable.
3. Disconnect the flex cable from the phone.

4. Now you need two thin wires that you can connect to the battery flex cable.
5. Find some old phone charger ( i used old nokia charger ) that can provide about 5.0v-5.8v.
6. If you have volt meter find where is the positive and negative (+) and (-).
7. Connect the battery positive (+) to charger positive (+) and negative to negative.


8. Plug the charger to power and wait about 15-13 minutes, do not leave in that charging position too much time because the battery may EXPLODE.
9. Disconnect all the wires and reconnect the battery to the phone (if not working wait few minutes and start over from step 7) maybe the connections is not good or mot enough charged.
10. power on the phone and you have solved that issue.
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25th April 2013, 05:46 PM |#2  
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This is really helpful. It should be a sticky. :thumbup::thumbup:


Also I would like you to add the type of screw drivers is needed to open the phone's cover and the pins.

Torque screw T5 screwdriver
Small Philips screwdriver


Sent from my Nexus 4 using Tapatalk 2
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25th April 2013, 08:25 PM |#3  
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Good to know in case it happens so thanks but I was just wondering whether just disconnecting battery terminals wasn't enough as quite a few mentioned that that's how they fixed it so not sure how this method works.
Anyway thanks

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26th April 2013, 05:37 PM |#4  
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It looks to me that there are circumstances where battery drain is such that the battery voltage drops too far too fast for the phone's charging circuits to cope. (Hence it happening mostly to people running battery-sapping benchmarks.)
27th April 2013, 08:30 AM |#5  
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Quote:
Originally Posted by gie62001

Good to know in case it happens so thanks but I was just wondering whether just disconnecting battery terminals wasn't enough as quite a few mentioned that that's how they fixed it so not sure how this method works.
Anyway thanks

Sent from my Nexus 4 using xda app-developers app

As i mentioned the battery discharged fully under the 0.2 Volt (after charging the phone with incompatible charger which output is about 3.5V) *in this case the battery is much powerful than charger and it forwarding the power back to charger and not the charger to phone*
so the phone doesn't know that the battery is OK and thinks that it is bad battery, in this case you should use my method or replace to new one if you have an choice to receive it fast or find in local shop.
I'm not guarantee that my method will save your battery you may need to replace it.
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27th April 2013, 09:47 PM |#6  
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According to the service manual, the wireless charger is also separate from the other phone circuitry.

The red light indicated trickle charging, which is slow. And maybe the phone uses more charging than even trickle charging can provide.

A Qi charger should charge the battery normally even if it is empty, as the phone does not need to power up to achieve high charge currrent.

That sounds a lot easier than opening it up and charging the battery manually!
28th April 2013, 07:48 AM |#7  
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Quote:
Originally Posted by jutezak

According to the service manual, the wireless charger is also separate from the other phone circuitry.

The red light indicated trickle charging, which is slow. And maybe the phone uses more charging than even trickle charging can provide.

A Qi charger should charge the battery normally even if it is empty, as the phone does not need to power up to achieve high charge currrent.

That sounds a lot easier than opening it up and charging the battery manually!

In this case the Qi or Original nexus charger not helping, because it connect to the same circuit as usb charger, the mother board controls the battery charging so in this case you cannot charge in any way if the phone thinks that the battery is bad.

Any way in most cases like that you will change to new battery because the old one is totally dead :/
28th April 2013, 09:33 AM |#8  
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Neat. So you basically used a defibrillator on the battery . Sad to see the battery management being so poor on this device that it lets the battery drop that low.

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29th April 2013, 07:08 PM |#9  
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Ummmmm. I think people are just being impatient. I had my N4 powered off while overseas for 2 months. When I returned and turned my N4 on, I received the "Red Light of Death".

I read through all of the forums and found the same fixes everywhere.

Open the phone up and reset the battery terminal bar, etc etc...

Now, I have no problem doing that, but I just couldn't accept such a major flaw from this phone, not to mention the problem appeared to be widespread.

Anyways, back to my original point, people are just crazy impatient and freak out over each and every little thing. The first thing they do is rip their phone open and start tinkering.

I ASSURE YOU. JUST LEAVE IT PLUGGED IN USING THE WALL CHARGER FOR AN HOUR OR SO, and it WILL turn back on.

Now, maybe there are situations out there where my method doesn't work, in that case, shame on LG and Google.

Though, I would be willing to bet, if this happens to anyone else, just leave it the hell alone and let it sit on the wall charger for a couple of hours, turning it on and off a few times in between (or at least attempting to), it will come back to life.
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30th April 2013, 10:33 AM |#10  
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It took a month to get my phone...When i got it finally..it had no charge at all..tried to switch it on but all i got was a red flashing led.it scared me a lot but i plugged in the charger and it stayed there for an hour until it turned on..

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30th April 2013, 03:24 PM |#11  
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There is a lot of cases for the red button, in my case nothing helped only that solution, I'm not telling people to use my advice when you see red light first of all should try easier way to solve it, like charge with original charger for few hours etc

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