By now I feel like the unluckiest person on this planet...
About two months ago, I lost my HD2 and of course whoever found it didn't return it. Then about a month ago, I bought another used HD2. The battery cover was severely scratched and there was some light damage at the corners so I ordered a new housing on eBay. In the mean time I have been installing all kinds of stuff on it but didn't actually use it as a phone (didn't insert my SIM card) because I wanted to wait for the new housing and for a protective silicon case - I didn't want to use the phone "unprotected".
I have replaced the housing of dozens of phones before so I know what I'm doing and what to look out for (I'm an electronics engineer) and replacing the housing of the HD2 was actually surprisingly easy.
When I put the phone back together again, it wouldn't turn on. At all. And when I put it on the charger, the charger light wouldn't come on. So I just opened up the housing again and put it back together. This time it did turn on. Figuring that was the end of it and that something probably wasn't making proper contact, I left it at that.
That was two weeks ago. Since then, the phone has been on all the time (in the charger) and I have been installing more stuff without any problems. Yesterday the protective silicon sleeve finally arrived so I inserted my SIM card and finally started using it as a proper phone. But today, all of a sudden it didn't want to turn on again. I had used the phone 10 minutes before (storing a contact).
I opened the housing again and checked if I could see anything loose, or not making proper contact but didn't see anything.
It still won't turn on again.
Is this HD2 deceased? The battery is fully charged BTW (and I tried another battery).
Anything I could try?
Triple check and make sure all battery pins are straight. when the battery is inserted, they need to be pressed down and inwards towards the middle of the phone. Be sure you don't have one being forced up or anything like that. I'd re open the case one more time and slightly bend the ground prongs on the board and flex cable assemblies back up just a hair to make sure they make good contact. Other than that the phone can actually power on without the back housing on at all so grounding to get it to power on isn't that crucial.
I recently replaced the digitizer on a Galaxy Tab 4 & that part at least went smoothly. The problem now is that the tablet will only turn on while it's plugged in... and when it does come on, it displays the msg "Unable to charge. Battery temperature too low." Yes, too low.. not too high.
I've tried re-connecting the battery, letting the tablet sit for an hour & even took the battery out and applied some heat to it with my heat gun(from a distance).
Does anyone know for sure what's causing this?
You must've have disconnected a cable or damged one when you replaced the digitizer. Check back
Sent from my Nokia Lumia 1520
I thought of that also... I had disassembled it again & checked all the connectors. Everything looked ok & after assembling everything again, re-connected everything(again) just to make sure.
Oddly, I have seen posts of people having the same issue with different devices. Most of them never had the problem solved(just had the device replaced).
I had the same problem
Hi there,
althought this isn't a very popular post, I'd like to add my 2 cents, because I had this same situation.
I ran into this same problem, after changing the digitizer and reassembled the device, had the low temp problem. I've noticed too that the glass was a little loose, and if tapping it in some places, the problem solved for seconds, so I dissasembled it again and foud that forgot to put the adhesive between the digitizer and the tablet...... :silly:
The adhesive was still in the old broken glass.
Changed back to the new one, assembled again now WITH the adhesive and the glass, reseated all the connectors in the back (just in case) , and boom, it's charging again like new.
Still haven't assembled the back plastic cover yet, but I guess the result will be the same.
I don't exactly know if the problem was the loose glass or some loose connector (all seemed to be ok), but the problem solved.
Hope anything of this helps.
Regards.
Little George.
voxigenboy said:
I thought of that also... I had disassembled it again & checked all the connectors. Everything looked ok & after assembling everything again, re-connected everything(again) just to make sure.
Oddly, I have seen posts of people having the same issue with different devices. Most of them never had the problem solved(just had the device replaced).
Click to expand...
Click to collapse
Hi everyone,
I recently successfully replaced the battery in my Moto X Pure after the original battery was showing signs of fatigue (charge wouldn't last anywhere near what it used to, would die suddenly from 20% battery power, etc.). I discovered today, however that my NFC is not working. Part of the process to replace the battery involves gently popping the NFC antenna off the old battery (the end of the flex cable with the NFC antenna is held by a drop of adhesive to the battery). I made a point of being careful when I did that, and with the phone now buttoned up again, everything else works 100%.
Aside from the obvious, "you must have broken it when you removed it from the old battery," anyone have any ideas as to why the rest of the phone is 100%, but my NFC isn't working? I checked all the relevant settings -- even turning them off and then back on again, no love. Does the NFC antenna connect via a harness that I would have disconnected to change the battery out? Does it even seem possible that everything else is working properly, but that isn't? Best to just try replacing the middle bezel housing with a $15 eBay special that includes a new NFC flex cable?
Thanks in advance for any ideas.
Edited to add: So, in looking at additional pictures of my phone, I came to the possible realization that the NFC flex that was attached to the old battery probably had to be attached to that exact same spot on the new one to make contact with the motherboard when the phone is put back together. I didn't even consider that it was just a pressure connection there that connected the hidden NFC antenna to the motherboard, and just used some double-stick tape to attach it to the new battery without paying particular attention to detail as to where it needed to be positioned. If someone can verify that I might be on the right track, I'd appreciate it. I'd hate to tear the thing down again for nothing since the back cover is a pain to get off, but this might be a simple fix.
Not sure if this is still an ongoing issue for you (I realize it's been a few months), but I just experienced this today, while changing my own battery--and for the very same reason as you. Yes, it does appear that the NFC module does need to be in the same place as it was on the original battery. I too learned this the hard way. Since the NFC module wouldn't stick to the new battery, I placed a piece of Scotch tape over it. Little did I realize, there are contacts on that module, that must interface with something else on the assembled phone. After a second disassembly, removal of the tape, and a check of the location in reference to the original battery, my NFC is working once again.
So my brother's zuk z2 has been broken for months now, and no repair shop could repair the phone.
I did a lot of digging and i found out that zuk z2 has a problem with quick charge 3.0 (It technically supports it but it doesn't have the necessary hardware for it)
If your zuk z2 (plus) has these symptomes this fix is guaranteed to work
Not charging.
Not turning on (Sometimes it might turn on).
Notification light blinking.
Heating in the lower part of the phone near the charging port. (If your zuk doesn't do that, then removing the cx chip will only disable fast charging)
The problem:This tiny chip with cx on it: https://i.imgur.com/YD8Eh2b.jpg
This chip is responsible for quick charge and it only supports quick charge from the original charger (that is what i was told).
When charging with an qc charger it may short out. That is where the heat is coming from.
The solution
You need to remove that chip.
You can just pry on it with a screwdriver and it pops out like its meant to do that.
Anyone can do this procedure at home, but you need a phone repair kit(<1$ online).
Or you can take your phone to the local repair guy and send them a link to this guide.
If you decide to do this by yourself i advise you to watch a teardown video, because there are some plastic tabs that you don't want to break.
1) First off, remove the sim card tray and then you need to remove the back glass, use a hair drier at the lowest setting and heat the lower part of the back of the phone (where the zuk logo is) around the perimeter.
When the glass is hot, use a suction cup to lift the glass and then use a plastic tool (only plastic tools) to slice the adhesive.
Try the suction cup method 3-4 times with heating, because the suction cup may not be strong enough to lift the glass up.
If the suction cup is not strong enough to lift the glass away, use a very thin and short piece of metal, wedge it between the glass and the plastic body (this will slightly damage the plastic) and the glass should pop out if it's hot.
Be very careful at the left upper side of the phone (the camera side) because there is the volume and power button ribbon and the battery ribbon. You don't want to damage those.
This is maybe the hardest part of this teardown.
This is how it looks like once the back cover is off: https://i.imgur.com/XGD5m7F.jpg
2) Because the chip is on the back side of the motherboard you will need to remove almost every component except the battery and some other smaller components.
Remove all screws.
Attention! one screw is under the battery ribbon.
Then try to remove the plastic.
The top plastic piece needs to be pulled from the opposite side of the back camera because there is a plastic latch near the back camera.
Pull that plastic piece up and then to the left (away from the back camera).
The lower plastic piece should be pulled from the upper most part, but it should be pulled first up and then pulled towards the top side.
If the piece doesn't move you need to remove residual adhesive or try to remove the lower plastic piece from the headphone jack side.
This is how it should look like without the plastic top cover: https://i.imgur.com/qEtXTg7.jpg
This is how it looks like without the bottom plastic piece:https://i.imgur.com/RlVhDQK.jpg
The problematic chip is in the red circle, but it is on the other side of the motherboard.
3)Unclip the connections, the antenna connectors, and the selfie camera.
By this point you should have removed the sim card tray, if not remove it NOW.
4)Remove the motherboard with the back camera (its held with some copper tape).
Inspect the charging port.
It should look something like this: https://i.imgur.com/bKiN5tG.jpg
The chip is very small.
This is how the chip looks like when removed: https://i.imgur.com/fCSJBds.jpg
This is the chip you want to remove: The one with CX on it!
This chip: https://i.imgur.com/YD8Eh2b.jpg
5)Remove the chip with something made out of metal, like a screwdriver.
6)Reassemble the phone and enjoy your charging phone.
Also this is why you would want to do it yourself.
This is what a "repair guy" did to the phone: https://i.imgur.com/5BiMn6s.jpg
He said that there was a short on the motherboard and the phone is completely dead.
The phone works, but now i don't have a power/volume button.
He obviously used a metal tool, as seen by the scratches left on the metal inside the phone.
So don't use a metal tool.
Edit: Removing this chip will only disable fast charging, if your device is perfectly working, or has different symptomes, don't remove this chip.
Edit2: The thread was broken,(only one image was showing). My dumb ass inserted the images wrongly.
Will removing this enable quick charge 3.0 support on our device ?
troublesom said:
Will removing this enable quick charge 3.0 support on our device ?
Click to expand...
Click to collapse
No
My phone is bot charging. So will removing this chip make it charging again??
And how it is so that without that chip it will work properly??
Does OTG work after removing it?
Sandeep7974 said:
My phone is bot charging. So will removing this chip make it charging again??
And how it is so that without that chip it will work properly??
Click to expand...
Click to collapse
Don't remove it .it regulates charging speed and safety
spandu500 said:
Does OTG work after removing it?
Click to expand...
Click to collapse
It does.
zuk z2 plus
thanks bro
its work for me
It did not work for me, unfortunately. I removed the black part of the chip and the problem continued, just stopped blinking the led and vibrated continuously. I removed the silver part of the chip and nothing, it continued in the same way without charging. But I figured out a way to charge it, I entered the TWRP menu, (by clicking on the power button to enter the recovery it would turn off, then I pressed the button to enter the recovery, it hung up and when it was already on the twrp). At the TWRP recovery I connected the charger, and then the ZUK started charging the battery more slowly than normal, but it charged 100%. I have it for at least 2 years, I always used the original charger, only 2 or 3 months I changed the cable that broke. So I believe this is not a hardware problem, but a software problem. I use the Cardinal rom, but it seems that this happens in any rom ...
Isaías J. said:
It did not work for me, unfortunately. I removed the black part of the chip and the problem continued, just stopped blinking the led and vibrated continuously. I removed the silver part of the chip and nothing, it continued in the same way without charging. But I figured out a way to charge it, I entered the TWRP menu, (by clicking on the power button to enter the recovery it would turn off, then I pressed the button to enter the recovery, it hung up and when it was already on the twrp). At the TWRP recovery I connected the charger, and then the ZUK started charging the battery more slowly than normal, but it charged 100%. I have it for at least 2 years, I always used the original charger, only 2 or 3 months I changed the cable that broke. So I believe this is not a hardware problem, but a software problem. I use the Cardinal rom, but it seems that this happens in any rom ...
Click to expand...
Click to collapse
I am sorry for you.
I really don't know if there can be such a software problem. (have you tried clean flashing?)
Did your phone heat up a lot when charging in the usb area?
Did the procedure fix the heating?
If it charges in any way, that is not a hardware problem.
Are you using any kind of rom tweaking apps (like kernel adiutor or smartpack kernel manager) if yes check in the battery section if charging is enabled or just uninstall them.
Try flashing the stock rom.
I know it is a pain in the butt to try all of these things, especially if your zuk is your primary phone (my zuk is not my primary phone and it has a problem with flashing custom roms that i haven't fixed in months)
I didn't try the original rom, it's too bad. It also has no kernel or overclocking app. Moreover, the device did not heat up in the usb area, only in the area of the processor, when it was charging, was always like this. What made a difference before the problem was that it got too hot, especially playing pupg, which I've done a lot in the last few days, and then he hung up. He always hung up, but it was rare to happen, days before the problem he started to hang up almost every day.
But I have something new, I saw the gmail notification of your message yesterday, so today I came to respond. The device was in the TWRP menu, charging, I turned on the system and the led turned on. As I write the battery charged 10%!
JoraForever said:
I am sorry for you.
I really don't know if there can be such a software problem. (have you tried clean flashing?)
Did your phone heat up a lot when charging in the usb area?
Did the procedure fix the heating?
If it charges in any way, that is not a hardware problem.
Are you using any kind of rom tweaking apps (like kernel adiutor or smartpack kernel manager) if yes check in the battery section if charging is enabled or just uninstall them.
Try flashing the stock rom.
I know it is a pain in the butt to try all of these things, especially if your zuk is your primary phone (my zuk is not my primary phone and it has a problem with flashing custom roms that i haven't fixed in months)
Click to expand...
Click to collapse
And the problem returns.
thank you i try remove the cx chip and it work after remove it charging decreased a bit from 2100 ma to 1980 ma and volt from 4.4 to 4.1:fingers-crossed::fingers-crossed:
Working, thanks!
it worked for me! many thanks!
JoraForever said:
So my brother's zuk z2 has been broken for months now, and no repair shop could repair the phone.
I did a lot of digging and i found out that zuk z2 has a problem with quick charge 3.0 (It technically supports it but it doesn't have the necessary hardware for it)
If your zuk z2 (plus) has these symptomes this fix is guaranteed to work
Not charging.
Not turning on (Sometimes it might turn on).
Notification light blinking.
Heating in the lower part of the phone near the charging port. (If your zuk doesn't do that, then removing the cx chip will only disable fast charging)
The problem:This tiny chip with cx on it: https://i.imgur.com/YD8Eh2b.jpg
This chip is responsible for quick charge and it only supports quick charge from the original charger (that is what i was told).
When charging with an qc charger it may short out. That is where the heat is coming from.
The solution
You need to remove that chip.
You can just pry on it with a screwdriver and it pops out like its meant to do that.
Anyone can do this procedure at home, but you need a phone repair kit(<1$ online).
Or you can take your phone to the local repair guy and send them a link to this guide.
If you decide to do this by yourself i advise you to watch a teardown video, because there are some plastic tabs that you don't want to break.
1) First off, remove the sim card tray and then you need to remove the back glass, use a hair drier at the lowest setting and heat the lower part of the back of the phone (where the zuk logo is) around the perimeter.
When the glass is hot, use a suction cup to lift the glass and then use a plastic tool (only plastic tools) to slice the adhesive.
Try the suction cup method 3-4 times with heating, because the suction cup may not be strong enough to lift the glass up.
If the suction cup is not strong enough to lift the glass away, use a very thin and short piece of metal, wedge it between the glass and the plastic body (this will slightly damage the plastic) and the glass should pop out if it's hot.
Be very careful at the left upper side of the phone (the camera side) because there is the volume and power button ribbon and the battery ribbon. You don't want to damage those.
This is maybe the hardest part of this teardown.
This is how it looks like once the back cover is off: https://i.imgur.com/XGD5m7F.jpg
2) Because the chip is on the back side of the motherboard you will need to remove almost every component except the battery and some other smaller components.
Remove all screws.
Attention! one screw is under the battery ribbon.
Then try to remove the plastic.
The top plastic piece needs to be pulled from the opposite side of the back camera because there is a plastic latch near the back camera.
Pull that plastic piece up and then to the left (away from the back camera).
The lower plastic piece should be pulled from the upper most part, but it should be pulled first up and then pulled towards the top side.
If the piece doesn't move you need to remove residual adhesive or try to remove the lower plastic piece from the headphone jack side.
This is how it should look like without the plastic top cover: https://i.imgur.com/qEtXTg7.jpg
This is how it looks like without the bottom plastic piece:https://i.imgur.com/RlVhDQK.jpg
The problematic chip is in the red circle, but it is on the other side of the motherboard.
3)Unclip the connections, the antenna connectors, and the selfie camera.
By this point you should have removed the sim card tray, if not remove it NOW.
4)Remove the motherboard with the back camera (its held with some copper tape).
Inspect the charging port.
It should look something like this: https://i.imgur.com/bKiN5tG.jpg
The chip is very small.
This is how the chip looks like when removed: https://i.imgur.com/fCSJBds.jpg
This is the chip you want to remove: The one with CX on it!
This chip: https://i.imgur.com/YD8Eh2b.jpg
5)Remove the chip with something made out of metal, like a screwdriver.
6)Reassemble the phone and enjoy your charging phone.
Also this is why you would want to do it yourself.
This is what a "repair guy" did to the phone: https://i.imgur.com/5BiMn6s.jpg
He said that there was a short on the motherboard and the phone is completely dead.
The phone works, but now i don't have a power/volume button.
He obviously used a metal tool, as seen by the scratches left on the metal inside the phone.
So don't use a metal tool.
Edit: Removing this chip will only disable fast charging, if your device is perfectly working, or has different symptomes, don't remove this chip.
Edit2: The thread was broken,(only one image was showing). My dumb ass inserted the images wrongly.
Click to expand...
Click to collapse
Thank you so much for this post, I have just done this and my zuk is charging again! Thank you sir for this post! :fingers-crossed: :good:
I deleted this chip, but after that it stopped connecting to the PC. The drivers all stood, the cable was working. Then I had the urge to change the firmware to https://forum.xda-developers.com/le...rom-flyme-7-3-0-0a-zuk-z2-plus-bylzy-t3923861, but he went into the bootloop, and then probably the battery played Darth Vader in Return of the Jedi.
Removal of the chip fixed my ZUK as well!
Thank you TS!!!
I must really thank you for the guide. My phone stopped charging suddenly, tried different cables, chargers, etc and none worked. I was about to go buy a new phone and somehow stumbled on this thread. After a few days getting the courage to open the phone, i did it, followed the guide and now it is charging!!
Thank you very much!!!
Big thanks, my zuk is now working again :good:
I have a problem with my Axon 7 (global). Ive decided to change battery on my own one week ago. I was super carefoul with every step i did, no cracks, no damage. I assembled everything togeather and suddenly no signal. Wifi worked perfectly. Now i have this often signal looses which persists even after reboot. Sometimes when I finally catch signal it shows me almost full 4g+, but on the other hand everythig works very sluggish. Super slow internet speeds, even for messeging via whats app for example. I tried to check if this is maybe some software issue. I was on global B03. I could not update to B04 via ota so i decided to downgrade, then install b04. I did, and this solved nothing. Problem persists and phone without wifi is unusable :/ Any ideas how to solve this?:crying:
Connector not seated properly inside it?
I also replaced my battery. The battery behaviour is now normal again but seen no differences in how it runs.
I think that it's not that, I've payed extra attention to this second time that I opened phone. All the connectors I've unplugged, then plugged it again, checked antenna as well. No visable damage to the cable or the connectors.
Thinking about my experience doing the battery, the two most difficult or potentially damaging things were separating the rear cover from it and getting the battery out. Once the cover separated it came off well. It was a hard job getting down under it. The battery was hard to start lifting but with isopropyl alcohol under it, It came up easier the more it was lifted. Maybe something around the battery has been compromised.
Thank you for your response. I did not use alcohol to remove battery, i used hairdryer, and i began to remove battery from other side (the one with antenna). Maybe i burned antenna? Is it possible? Sryly no visible damage, nothing! Everything else works. BT, Wifi, all functions - only signal problem. Any idea what part should i change? I also founded some info in iOS forum somewhere, supposedly iPhone 6 or 7 had similar issue when someone changed battery. They suggested to unplug battery and hold every button for 30-60 seconds, one after another, to "discharge components" or something. I dunno :/
You change the charger board too?
I ordered from Ali only antenna, should i order charging board as well? Anyway, why charging board? Is there some important components that i could have damage? Why not motherboard as well? Antenna is connecting charging and motherboard together. Just wanna know why do you think that i should change charging board as well, maybe Ill learn something new