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[HARDWARE FIX] Xperia Z not charging or booting

OP quickstyler

23rd May 2014, 04:19 PM   |  #1  
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Problem: Xperia Z is not charging, not turning on, false battery stats or stuck in an non-software-caused bootloop... It's caused by a broken battery connector on the mainboard

Ok guys... I present you...


It's a cheap n' dirty fix! Use at your own risk - I don't care if your house burned down because of this...

STEP 1 - Remove the Backcover (see this youtube video how to do it -
STEP 2 - Remove the Battery (Be very carefull not to crack your display doing this...)
STEP 3 - Bend Battery Connector Pins

- Get a very thin cable (eg. from a USB Cable you cut down) and a soldering iron
STEP 5 - Solder the cable to the battery pinpoint >> TH << and on to the testing pinpoint on the mainboard according to my images

Should look like this...

STEP 6 - Assemble everything together again and connect the phone to the original Sony Charger
STEP 7 - Wait 2-3h for the handset to be charged
STEP 8 *additional* - Boot up device and install Sony Mobile Battery Test from here: <--- (You can just take the .apk from the .rar file and install it)

SUCCESS! If your screen looks like this everything went fine:

Image of finished repair...I put some red plasti-dip around the fix-cable to isolate it


Battery stats should be now OK - If not solder battery pinpoint EN to the PCB pinpoint behind (not under)

So what was the problem?

Sony's battery connector on the PCB is a cheap plastic sh*t... there are 6 connection points... 2 for +, 2 for -, 1 for temperature (TN - located middle top) and one EN ??? after some time the TN signal does not connect correctly causing this problem. you can't charge the battery and/or get false battery stats...if the battery is empty you can't boot anymore even with ac charger connected...

On my screenshot on top you see the battery temperature is 34 and green - OK - everything working fine

But without the fix you'lI get this:

Complete bull****...minus -30...I'm not even close to Sibiria

So one step was to get rid of this fault... Since I got sometimes the right values (about + 30C) when I was holding the connection between battery and pcb together with my fingers while device was on, I thought it is a problem with the connection.

The main problem on my two devices was that they didn't charge... When connected to AC -> bootloop ...

I got a fully charged battery and found this problem with the battery test app.. Fixing the battery connection to transmit correct temperature data made it possible to charge the battery fully again...battery stats are working and correct...I can now charge the devices as normal (in turned on or off state) ... i did buy new batterys but used the old ones for the fix and they work perfectly


Note if you open your device it may not be water resistant can buy a new seal on ebay

If it worked for you please say thanks/like

thx 2 hunix for his software fix thread
Last edited by quickstyler; 23rd May 2014 at 05:38 PM.
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27th May 2014, 01:00 PM   |  #2  
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Thanks for the thread, quickstyler, I had lost all hope before checking this and hunix's thread. I am yet to try the hardware fix as I wanted to first check if I have the same issue using the battery tester. I ran into some problem with the software fix, please check my post in the other thread and reply if you can help with anything.
3rd June 2014, 06:41 PM   |  #3  
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This guy explains the whole battery temperature thing.
14th July 2014, 01:18 PM   |  #4  
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my xperia Z battery didn't charge and run dry then I'm change to new battery with have 60% connect pc andd repair.
But my battery still didn't charged i'm try Sony Mobile Battery Test and it say "Charge System Fail"
so i'm change to my old battery and follow your instuction but it doesn't seem work.
btw i'm try to google "xperia Charge System Fail" but not find any solution.
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15th July 2014, 12:57 PM   |  #5  
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My problem is that my phone charges very slow and discharges very fast!
When i turn off the phone, it stays hot/warm
16th July 2014, 04:52 AM   |  #6  
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####off topiC!

From where i get SONY MOBILE BATTERY TEST aPp?
Last edited by androidfreak70; 17th July 2014 at 01:04 AM.
29th August 2014, 03:20 AM   |  #7  
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Hi, great info!!

I have a Z1 with the same battery-not-charging issue, any hints about the testpoint on that model?
30th August 2014, 02:22 AM   |  #8  
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My phone only work when plugged in... Blackout when unplugged... Will this fix work?
25th September 2014, 06:29 PM   |  #9  
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Same problem My phone only work when plugged in... Blackout when unplugged... Will this fix work?

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