Develop Bugs

serious USB-port issues

Hello!
First things first: i already googled and search-functioned about 8 hours for solutions, tried them all and still got no luck so basically you girls and guys are my last hope. i hope my english isnt as rusty as i think it is. if i make any mistakes of any kind, please bear with them.
Used Hardware: Galaxy Nexus, the original Samsung OTG cable and the original Samsung charger
Software: Rooted, Bootloader-unlocked, stock-Android 4.0.4, 4.1.1 and 4.1.2
What is my problem?
as soon as i plug in the original charger it charges (duh!)
however, the moment i unplug it, the phone keeps thinking it is being charged. forever!
plugging in a original samsung USB cable without connecting it to something doesnt help, it still thinks of being charged.
but plugging in the original OTG cable stops the phone from thinking of being charged! (i dislike the thought of running around with a OTG dangling around the phone so that isnt a solution to me )
what happened before that incident?
bought on 15th December 2011
last software update 4.1.1 to 4.1.2 on 16.10.2012
worked perfectly until Yesterday
Recently i played around with the OTG cable and tried the following hardware to see wich works with my setup:
external HDD - NTFS formattet
PS3 Sixaxis controller
Corsair Flash Voyager USB3.0 Stick
AKAI MPK mini USB MIDI controller
Newest apps installed:
Sixaxis Compatibility Checker (18.10.2012 installed, used for half an hour and deinstalled)
Wolfram Alpha (17.10.2012 installed)
MyBoy (an GBA emulator - 12.9.2012 installed)
-latest ROM for that emulator downloaded on 13.9.2012
what did i try to fix the problem (in exact order)?
rebooting
changing the battery from 2000mAh (its an original, bought about half a year ago) to stock 1750mAh
removing the battery for 10 minutes
draining the battery to absolute zero and fully recharge it
carefully cleaning the microUSB port (with battery remover of course)
super carefully bending up the thounge-like part inside the microUSB port so that it doesnt get in contact with any surrounding metal parts (battery removed of course. when i say super carefully, i mean super duper carefully! i know how fragile those parts are!)
trying to hard reset the phone (that was a failure i just got from fastboot mode to a droid with a red triangle and an exclamation mark on its open stomach)
factory resetting the 4.1.2 via factory reset option (backup with Titanium Backup was made correctly but i forgot to copy it from droid to PC :silly: )
wiping the cache via fastboot
quick reflashing the 4.1.2 via fastboot
quick downgrading back from 4.1.2 to 4.1.1
quick downgrading back from 4.1.1 to 4.0.4
quick upgrading to 4.1.1 (it still is in that state)
complete reflashing the 4.1.1
- with reflashing bootloader
- with reflashing radio
- with reflashing recovery partition
now i am out of ideas
i think the USB port is seriously damaged. but since i am not so good with soldering and electronics i fear that i am not able to exchange that.
any more suggestions or ideas what might have been the cause?
next few days i will take it to the service center wich i really dislike to do because here where i live that means they keep it for about 6-9 weeks to fix it and i will not get a replacement in the meantime. anyhow my hopes are low that they might fix it i rather believe they replace it for a new one wich i also would dislike. Good thing i made a insurance for that device so in worst case i dont have to pay a single buck...
greetings everyone

Weird. Did you try flashing a stock Google 4.1.2 image? (Check out mskip's thread in Galaxy Nexus Android Development and download the toolkit - make sure it's compatible with 4.1.2 first)

Yes your USB port is most likely broken. Many others have had this problem including me.
Mine was so bad that my PC wouldn't recognize it and neither of my pogo pin docks would work.
I replaced the USB flex cable this week and it works great now. It was a relatively easy repair if you take your time and have the right tools.
The part only cost me $7. http://www.ebay.com/itm/190704059979
Sent from my Nexus 7 using xda premium

thanks mohitrocks but i also tried that, not only once.
El Daddy are there some how-to's? If it is easy i will try to do this before handing it in to the service center.
greetings

El Daddy said:
Yes your USB port is most likely broken. Many others have had this problem including me.
Mine was so bad that my PC wouldn't recognize it and neither of my pogo pin docks would work.
I replaced the USB flex cable this week and it works great now. It was a relatively easy repair if you take your time and have the right tools.
The part only cost me $7. [link removed because i am new ]
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
is that part compatible with the European version of the GNex?

DrKaputnik said:
is that part compatible with the European version of the GNex?
Click to expand...
Click to collapse
The USB ports should be the same as micro sd is a universal standard I believe.

DrKaputnik said:
thanks mohitrocks but i also tried that, not only once.
El Daddy are there some how-to's? If it is easy i will try to do this before handing it in to the service center.
greetings
Click to expand...
Click to collapse
Yes, read this thread http://forum.xda-developers.com/showthread.php?p=32696962 there is a video and ifixit guide on the last page
DrKaputnik said:
is that part compatible with the European version of the GNex?
Click to expand...
Click to collapse
Yep, any gsm version.
Sent from my Galaxy Nexus using xda premium

I had that same issue after my phone got wet. After about 2 weeks the issues with my USB port went away altogether.
You take your phone places where water might condense on/in it?

thanks miketoasty and thanks El Daddy! i really like this forum a lot very helpful people here.
i ordered the part. Estimatet shipping date somewhat between 30. october and 5. november.
will post updates
at least that error of mine doesnt drain extra battery
reuthermonkey:
i cant think of any place i visit frequently with high levels of moisture or with wet places. I am really careful about that because i love my Nexus witch even goes as far as never ever taking it into the bathroom (not even to a save and dry spot) while showering or bathing. Rain is a bit rare here and even if it is raining i wont leave the house without putting the phone inside a phone-pocket and into the inner side of my jacket.
greetings

I had the same issue as you. I ordered a new charging port cable for $7 on ebay, installed it in 15 minutes, and all is well in the world.
Sent from my Galaxy Nexus using xda premium

If anyone else is having issues, I have a spare USB flex cable that I can send you for just the price of shipping...most likely $3 or so.

nexus not charging

i know it is already posted but my issue is different. Some can charge their phone when it is off but mine cant charge even if its off.
When its off and i plug the charger the lightning logo appears, it indicates that its charging but when i turn it on the percentage of the battery remained the same. it didnt charge at all. Also my pc does not recognize my phone whether if its off or on.
i tried with no luck changing rom, kernel, used different cables and chargers (i even used one from LG).
i want to take it back to samsung but my bootloader is unlocked, im using costume rom, and rooted. They will not accept or repair it
EDIT: i want to install the stock rom and relock bootloader but how? since my pc doesnt connect to my phone

Look in the development section and download the nexus toolkit.
Sent from my Galaxy Nexus using xda app-developers app

ticholas said:
Look in the development section and download the nexus toolkit.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
How can i use it if my pc can't recognize my phone? Driver is already installed and it was working before
Sent from my Galaxy Nexus using xda app-developers app

Use a cocktail stick and try push the chipinside your phone slot upwards a little (if the phone were laid faceup on a table). Be delicate as you dont want to force it, but a little nudge up and your problems should aaaaall be resolved.

ive already done that no luck.

bump!
if i can restore my phone to stock recovery, stock rom, stock kernel, remove root will they accept it(warranty)? or do they have something to know that i modified my phone?
EDIT: because im planning to return in back to samsung

Please read forum rules before posting
Questions go in Q&A
Thread moved
Thanks
FNM

Is it a play store model or international? If it is international and you are located in the USA, Samsung will not do it. You can replace the usb port yourself..

mine too
Mine did the exact same thing. Good luck sending it in and having them actually fix it. I'm beginning to think their tech guys are really just a room full of chimps randomly putting stuff together.
I told them exactly what the problem was (because I looked it up before sending it in and my problem was the exact same as everyone else's) and they ignored me and just switched out the battery. That didn't work, so I sent it back again. Then, they updated the software. Since it's a hardware issue, obviously that did nothing. Now, they have repaired the PBA. I don't know what a PBA is or what it has to do with my USB port, but I'm betting the issue still will not be fixed and I'll have to send it back, yet again. After all this mess, I think I'm done with Samsung entirely.

turtlemama said:
Mine did the exact same thing. Good luck sending it in and having them actually fix it. I'm beginning to think their tech guys are really just a room full of chimps randomly putting stuff together.
I told them exactly what the problem was (because I looked it up before sending it in and my problem was the exact same as everyone else's) and they ignored me and just switched out the battery. That didn't work, so I sent it back again. Then, they updated the software. Since it's a hardware issue, obviously that did nothing. Now, they have repaired the PBA. I don't know what a PBA is or what it has to do with my USB port, but I'm betting the issue still will not be fixed and I'll have to send it back, yet again. After all this mess, I think I'm done with Samsung entirely.
Click to expand...
Click to collapse
i have sent it already. fortunately i was able to return to stock without USB. Hope they cant detect that ive done a mess on my phone.
probably the repair shop where you took your phone are just too lazy to repair. I hope they wont do the mess they did to you but i think it depends on tech guys if they are lazy enough to repair.
lowandbehold said:
Is it a play store model or international? If it is international and you are located in the USA, Samsung will not do it. You can replace the usb port yourself..
Click to expand...
Click to collapse
it is international and im in Italy. i took it back to the shop where ive bought and they'ce accepted it. The problem is that this shop will send my phone to samsung and i afraid that they will call me and ask me if i did something that voids my warranty

silverhunk said:
i have sent it already. fortunately i was able to return to stock without USB. Hope they cant detect that ive done a mess on my phone.
probably the repair shop where you took your phone are just too lazy to repair. I hope they wont do the mess they did to you but i think it depends on tech guys if they are lazy enough to repair.
it is international and im in Italy. i took it back to the shop where ive bought and they'ce accepted it. The problem is that this shop will send my phone to samsung and i afraid that they will call me and ask me if i did something that voids my warranty
Click to expand...
Click to collapse
Did you get it fixed?

This is kind of what my phone is doing too (here's the thread i've made)
http://forum.xda-developers.com/showthread.php?t=2059289
It will charge, but only to a certain point, regardless of rom, kernel, on or off, etc
over the past few days the maximum charge has gone down and down. Now it only charges to a max of 82%. I have 2 batteries and it does the same thing on each. My (hopeful) solution is that i bought an external wall battery charger and will charge batteries that way. I have the verizon model so if i wanted to do some sort of warranty work i'd probably have to go through them (not even sure if im still covered). I really dont want to deal with it. It boggles my mind why my phone is doing this though, charges fine but not to full. Oh well c'est la vie.

cymru said:
Use a cocktail stick and try push the chipinside your phone slot upwards a little (if the phone were laid faceup on a table). Be delicate as you dont want to force it, but a little nudge up and your problems should aaaaall be resolved.
Click to expand...
Click to collapse
i wouldnt recommend that to people, for me it went from a phone with "phantom charging" (ie flashing on and off for charging) and issues charging to a short circuit on the usb connection, so that the phone switches off when a usb cable is plugged in. What is well worth trying first is simply giving the port a good clean, a little bit of alcohol and that same cocktail stick may well solve your issue. I've been left charging via a chopped up usb cable to the dock connectors.
i dont doubt that forcing the tab in the port may have worked for you, but it has failed badly for others (ie me), so just be careful suggesting it

I had a similar problem as my micro usb socket was damaged. Don't worry about sending it for repair, do it yourself. The circuit board with a new micro usb socket is available on ebay, I paid £5 for mine. Watch a tear-down video or 2 on youtube and you will be sorted.
The GNex is easy to take apart requiring just a small philips head screwdriver and a pry tool, i used a guitar pik, and these are also available on ebay for just a few ££'s.
Can do the whole job in 15 minutes.

[Q] Am I screwed?

So I am having an issue with my USB port, it seems loose, and will only charge if the cable is pushed upwards a bit. It is also unable to connect to a computer. My question is, is it possible for me to lock my bootloader without having usb access, or root (root got messed up when I decided to update without attempting to preserve it)? Or gain root without usb? I feel like I'll have to send it in to get repaired/replaced, and from what I've read it will need to be fully stock for that. Thanks

Depends how the usb is broken. May be easily repaired yourself. Any chance you can get a pic up so we can help better?

Hotkeys said:
So I am having an issue with my USB port, it seems loose, and will only charge if the cable is pushed upwards a bit. It is also unable to connect to a computer. My question is, is it possible for me to lock my bootloader without having usb access, or root (root got messed up when I decided to update without attempting to preserve it)? Or gain root without usb? I feel like I'll have to send it in to get repaired/replaced, and from what I've read it will need to be fully stock for that. Thanks
Click to expand...
Click to collapse
first try another usb cable
i faced the same problem and changed the cable and it worked

https://play.google.com/store/apps/details?id=net.segv11.bootunlocker
This app claims to unlock/lock the bootloader. I haven't used it,so can't say it works.

maschiosoosai said:
https://play.google.com/store/apps/details?id=net.segv11.bootunlocker
This app claims to unlock/lock the bootloader. I haven't used it,so can't say it works.
Click to expand...
Click to collapse
you need root to use that app

simms22 said:
you need root to use that app
Click to expand...
Click to collapse
Oops,didn't see that.Bad eyes,I guess.
---------- Post added at 10:42 PM ---------- Previous post was at 10:37 PM ----------
https://lh6.ggpht.com/9un6zjZ7yQUs9_J9h_MVYfRPTD1HnDyvGx0425DFWgIagTpuKSgj35bNOg_kYQmVCTU
I'm not rooted now,but if you updated via OTA maybe OTA RootKeeper can help.

Hotkeys said:
So I am having an issue with my USB port, it seems loose, and will only charge if the cable is pushed upwards a bit. It is also unable to connect to a computer. My question is, is it possible for me to lock my bootloader without having usb access, or root (root got messed up when I decided to update without attempting to preserve it)? Or gain root without usb? I feel like I'll have to send it in to get repaired/replaced, and from what I've read it will need to be fully stock for that. Thanks
Click to expand...
Click to collapse
Been having the same charging problem, can't get adb to recognize the nexus. I've uninstalled/reinstalled the drivers. Doesn't matter if I use another USB. If anyone has another solution I'd love to hear it.

Try cleaning the bottom of the opening with a sharpened toothpick or paperclip with the battery removed. If that doesn't help try gently prying the tongue inside the charging port away from the wall.
This worked for me.
Sent from my Galaxy Nexus using xda premium

Sorry for the lack of reply guys, been busy doing things with family due to Christmas and all that jazz.
063_XOBX said:
Depends how the usb is broken. May be easily repaired yourself. Any chance you can get a pic up so we can help better?
Click to expand...
Click to collapse
I don't have a camera nearby at the moment, but I'll do my best to get a picture up soon.
rabeaoghly said:
first try another usb cable
i faced the same problem and changed the cable and it worked
Click to expand...
Click to collapse
I already have tried 2 other cables, and have had no luck unfortunately. All exhibit the same issue, so it's most likely the port.
At the moment I'm able to charge my phone if I prop the cable on something or use some other method to sort of push the jack upwards slightly, so maybe something is loose?

Hotkeys said:
Sorry for the lack of reply guys, been busy doing things with family due to Christmas and all that jazz.
I don't have a camera nearby at the moment, but I'll do my best to get a picture up soon.
I already have tried 2 other cables, and have had no luck unfortunately. All exhibit the same issue, so it's most likely the port.
At the moment I'm able to charge my phone if I prop the cable on something or use some other method to sort of push the jack upwards slightly, so maybe something is loose?
Click to expand...
Click to collapse
google it....i'm finding a lot of info about it simply being dirty inside the charging port. makes sense when you think about it. mine's in my pocket all the time, the port doesn't ever get covered and lint/etc builds up. i watched a few youtube videos. one guy used a really small sewing needle. another used a bigger one but filed it down. both said their charger felt loose when they plugged it in and afterwards it would lock like it was brand new. haven't had a chance to see if i've got anything small enough to do this yet but i'm willing to bet that that's my problem, and maybe yours as well. soon as i get around to it i'll post back again. and if you try it, be careful not to damage the connection inside

[Q] Problem with OTG

Hi, I am having a slight problem and am at a loss.
First of all, my phone is stock. I bought my OTG cable a few months ago and it worked just fine. I was using it to play games with my PS3 remote. However, with less time on my hands, I put the games aside and with it, I was no longer using my OTG cable.
Whenever I plug in the OTG cable, nothing happens and I don't get a notification that a USB device is connected. I have confirmed that it is not the OTG cable as I have tried it on 3 other phones, all of which responded to the cable connecting.
I am not sure when this problem started happening, but I didn't notice until yesterday when I was trying to use my OTG cable. In addition, when I plug in my phone to my laptop, my phone doesn't give me the option to turn on debugging mode. Again, I don't know when this problem actually began. I mention this because I am not sure if it is relevant to my OTG cable problem. Yes, I have checked and debugging mode is enabled.
I am not sure what to do and I have scoured the web trying to find a solution. Maybe I am searching in the wrong places, or maybe I am not just searching correctly, but I figured that my last option was coming here.
I thank you ahead for your time and hope that a solution can be found. I will be more than happy to provide any more details of needed.

leprkon said:
Hi, I am having a slight problem and am at a loss.
First of all, my phone is stock. I bought my OTG cable a few months ago and it worked just fine. I was using it to play games with my PS3 remote. However, with less time on my hands, I put the games aside and with it, I was no longer using my OTG cable.
Whenever I plug in the OTG cable, nothing happens and I don't get a notification that a USB device is connected. I have confirmed that it is not the OTG cable as I have tried it on 3 other phones, all of which responded to the cable connecting.
I am not sure when this problem started happening, but I didn't notice until yesterday when I was trying to use my OTG cable. In addition, when I plug in my phone to my laptop, my phone doesn't give me the option to turn on debugging mode. Again, I don't know when this problem actually began. I mention this because I am not sure if it is relevant to my OTG cable problem. Yes, I have checked and debugging mode is enabled.
I am not sure what to do and I have scoured the web trying to find a solution. Maybe I am searching in the wrong places, or maybe I am not just searching correctly, but I figured that my last option was coming here.
I thank you ahead for your time and hope that a solution can be found. I will be more than happy to provide any more details of needed.
Click to expand...
Click to collapse
Sounds like a bad USB port. You can replace it yourself, or do a warranty exchange. I don't think it's software related but try factory resetting. Or another ROM.
Sent from my SAMSUNG-SGH-T989 using Tapatalk 2

It sounds similar to what my phone was doing a few days ago. I don't have the OTG, but when I plugged my phone in to the computer, it only went to charge mode and didn't give the USB options, and the computer didn't recognize it at all. I ended up flashing back to stock rooted and it started working again. I flashed CM and then AeonFluxx again and it continued working, so I assume that it was either an app I had installed or something extra I had flashed. Either way, it's working now.
TL;DR Try reflashing before you start tinkering with the hardware, that fixed a similar problem for me.
Sent from my SGH-T999 using xda premium

Alright, thanks guys.
I think I am just going to do a factory reset.
I am able to charge my phone just fine and it connects to the computer just fine as well (Heck, I can do what many others can't....connect to Kies). I have no problems with data transfers either.
So I assume this is a software based problem.
...I may as well root while I am at it....
Haha, I will tinker around a little bit more before I do a factory reset and come back with my results.
Thanks again!

Are you using a kernel with fast charge?
Never mind. You are not rooted so that is not the issue.

Well, it looks like the factory restore didn't solve either issue. So I ended up calling it in and hopefully the replacement phone will work. Gonna have to wait a bit though...GS3's are currently on back order.
Thanks again for the advice though guys! Appreciate it!

leprkon said:
Well, it looks like the factory restore didn't solve either issue. So I ended up calling it in and hopefully the replacement phone will work. Gonna have to wait a bit though...GS3's are currently on back order.
Thanks again for the advice though guys! Appreciate it!
Click to expand...
Click to collapse
Sorry to hear that man, hopefully you get your new S3 soon!

leprkon said:
Well, it looks like the factory restore didn't solve either issue. So I ended up calling it in and hopefully the replacement phone will work. Gonna have to wait a bit though...GS3's are currently on back order.
Thanks again for the advice though guys! Appreciate it!
Click to expand...
Click to collapse
HA i had to wait THREE weeks before FINALLY getting my warranty replacement. Oh and then the replacement was just absolute **** so i sent that back. ANd am now waiting for another device. Good luck buddy! Hope you have better experience with this replacement crap then i do!

Asus Zenfone 2 ZE551ML - very slow charging, not detected by PC.

I have two pieces of ZF2 ZE551ML at home. One is my and the other one belongs to my wife. My wife's phone had a broken mini USB port - the first 2 pins from the left were visible - the plastic had broken apart. Firstly, I did not relaise it could be the problem, luckily I managed to change the whole PCB including the broken USB port, however after this change the phone is not being detected by a PC, nor it is fast charging. As I have two phones at home, I checked performance with the other unit and unfortunately, the other one does quick charge and is detected by aPC, so it is not the cable, neither is it the missing software.
I bought another PCB and changed it as well, however still no joy. Does anyone have any brilliant idea how to fix it. I should also say that all other or most of the functions of the phone are working fine (at least those I managed to check: GPS, Wi-Fi, GSM+dual SIM, torch, bluetooth, and so on).
The only problem is that the phone loops on the SMMI Test #1 and is not going any further. I have also tried to detect phone by adb, still no joy. The phone is not rooted!
I have my personal suspects that it could be the faulty main board or a software bug. Any ideas how to fix it?
My phone is running LP 5.0, soft: LRX21V.WW-ASUS_Z00A-2.20.40.198_20160930_8756_user044030427_201501060109, kernel [email protected] #1 Fri Sept 30 15:31>23 CST 2016

Sdcard slot is working?
I would check the connections on both ends of the flex cable with the sim and sd slots on it.
I am having the same problems (because of the busted sd slot). I ordered a new flex cable. When it arrives (approx. 2 weeks) I'll know if that was the cause.

Yes, SD slot is working and both SIMs, so the phone itself works fine, only very long charging and is not detected by a PC.

Mattiii said:
I have two pieces of ZF2 ZE551ML at home. One is my and the other one belongs to my wife. My wife's phone had a broken mini USB port - the first 2 pins from the left were visible - the plastic had broken apart. Firstly, I did not relaise it could be the problem, luckily I managed to change the whole PCB including the broken USB port, however after this change the phone is not being detected by a PC, nor it is fast charging. As I have two phones at home, I checked performance with the other unit and unfortunately, the other one does quick charge and is detected by aPC, so it is not the cable, neither is it the missing software.
I bought another PCB and changed it as well, however still no joy. Does anyone have any brilliant idea how to fix it. I should also say that all other or most of the functions of the phone are working fine (at least those I managed to check: GPS, Wi-Fi, GSM+dual SIM, torch, bluetooth, and so on).
The only problem is that the phone loops on the SMMI Test #1 and is not going any further. I have also tried to detect phone by adb, still no joy. The phone is not rooted!
I have my personal suspects that it could be the faulty main board or a software bug. Any ideas how to fix it?
My phone is running LP 5.0, soft: LRX21V.WW-ASUS_Z00A-2.20.40.198_20160930_8756_user044030427_201501060109, kernel 3.10[email protected] #1 Fri Sept 30 15:31>23 CST 2016
Click to expand...
Click to collapse
may be the pcb you changed is for different version. try replacing it with your other phone if you have the same model. post if works.

sukhwant717 said:
may be the pcb you changed is for different version. try replacing it with your other phone if you have the same model. post if works.
Click to expand...
Click to collapse
Hi, I did changed both PCBs between phones. Firstly, I had the same problem on both phones, then I made better connections and the batteries started to warm up. Finally, the new one works with the other phone, the old one from the other phone still creates the problem. Probably, it is not the PCB then, or USB connection. It must be something else.
Anyone, any idea?

Mattiii said:
Hi, I did changed both PCBs between phones. Firstly, I had the same problem on both phones, then I made better connections and the batteries started to warm up. Finally, the new one works with the other phone, the old one from the other phone still creates the problem. Probably, it is not the PCB then, or USB connection. It must be something else.
Anyone, any idea?
Click to expand...
Click to collapse
try fashing raw firmware
on motherboard you can inspect or clean the connector where pcb connects. use magnifying glass to inspect connector

Ok, I actually would like to flash the raw firmware, however I need some guidance here, as the phone that has a problem, is not rooted, and it cannot be detected by any PC now, so I am stuck in the middle and do not know how to proceed...

sukhwant717 said:
try fashing raw firmware
on motherboard you can inspect or clean the connector where pcb connects. use magnifying glass to inspect connector
Click to expand...
Click to collapse
Ok, I actually would like to flash the raw firmware, however I need some guidance here, as the phone that has a problem, is not rooted, and it cannot be detected by any PC now, so I am stuck in the middle and do not know how to proceed...
and the connectors are clean

Mattiii said:
Ok, I actually would like to flash the raw firmware, however I need some guidance here, as the phone that has a problem, is not rooted, and it cannot be detected by any PC now, so I am stuck in the middle and do not know how to proceed...
and the connectors are clean
Click to expand...
Click to collapse
i am little confused here... you changed pcb on one mobile and fast charger do not works on that. you have other mobile which is working perfectly. both are same model.... if right!! do the following thing to find out...
Phone A:- changed PCB. no fast charge, not detected by pc.
Phone B:- working perfectly normal..
now we want to guess if pcb is faulty or there is issue with flex cable or any software related issue..
remove motherboard from phone A. and install it in Phone B.. if on Phone B. things works well then definitely its problem related to pcb.. if things don't works on phone B too. then it may be a firmware related problem..
raw cannot be installed without pc..... the thing you can ty is updating firmware from sd card via recovery mode.

sukhwant717 said:
i am little confused here... you changed pcb on one mobile and fast charger do not works on that. you have other mobile which is working perfectly. both are same model.... if right!! do the following thing to find out...
Phone A:- changed PCB. no fast charge, not detected by pc.
Phone B:- working perfectly normal..
now we want to guess if pcb is faulty or there is issue with flex cable or any software related issue..
remove motherboard from phone A. and install it in Phone B.. if on Phone B. things works well then definitely its problem related to pcb.. if things don't works on phone B too. then it may be a firmware related problem..
raw cannot be installed without pc..... the thing you can ty is updating firmware from sd card via recovery mode.
Click to expand...
Click to collapse
That is correct, I say it again - I have two phones, same model, same software, kernel, etc. One had a damaged mini USB port, so I purchased 2 PCBs which have mini USB port souldered onto them. I bought them twice, as I was not sure if the first one I got was the correct one. Now, after your first message I changed the PCBs between phones and the result is the same, phone A (which is ok) works with the replacement PCB, and the PCB from working phone still does not work with phone B (the one that has a problem).
As a second step I replaced motherboards between phones now, and the result is still the same, meaning the motherboard from phone B does not seem to work better while it is in phone A body. The symptoms I'm struggling with are: charging takes over 8-9 hours, so it is considerably extended charging (battery is original factory battery 3000 mAh), the phone does not fastcharge at all and it is not detected by any PC.
The phone is not roooted so, I'm afraid I cannot make any changes to firmware through recovery, as it needs to be connected by a cable to a PC, unless there is something else I can do about it, but how to get any further?

Mattiii said:
That is correct, I say it again - I have two phones, same model, same software, kernel, etc. One had a damaged mini USB port, so I purchased 2 PCBs which have mini USB port souldered onto them. I bought them twice, as I was not sure if the first one I got was the correct one. Now, after your first message I changed the PCBs between phones and the result is the same, phone A (which is ok) works with the replacement PCB, and the PCB from working phone still does not work with phone B (the one that has a problem).
As a second step I replaced motherboards between phones now, and the result is still the same, meaning the motherboard from phone B does not seem to work better while it is in phone A body. The symptoms I'm struggling with are: charging takes over 8-9 hours, so it is considerably extended charging (battery is original factory battery 3000 mAh), the phone does not fastcharge at all and it is not detected by any PC.
The phone is not roooted so, I'm afraid I cannot make any changes to firmware through recovery, as it needs to be connected by a cable to a PC, unless there is something else I can do about it, but how to get any further?
Click to expand...
Click to collapse
which firmware you are currently on? lolipop or MM? factory reset your device then apply latest lolipop update from sd card

sukhwant717 said:
which firmware you are currently on? lolipop or MM? factory reset your device then apply latest lolipop update from sd card
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Click to collapse
I was on lolipop, updated to MM now, but still no joy, charges very slowly like before and when connected to any PC it says one of the recently connected devices is not working properly, so I'm stuck ... I cannot root or apply any ADB sideloads ...

Mattiii said:
I was on lolipop, updated to MM now, but still no joy, charges very slowly like before and when connected to any PC it says one of the recently connected devices is not working properly, so I'm stuck ... I cannot root or apply any ADB sideloads ...
Click to expand...
Click to collapse
Is your ext. sd being seen in file manager ?
Can you get into 6.0 recovery ?
If yes , you can now downgrade which will reset your fone , With a factory reset in the process , check my signature below.
Your fone not being seen maybe driver issue if other zens too are not being seen...but ..let's see what happens after downgrade.
After downgrade if still slow charge, reboot while connected to charger.
If same prob ..hardware !

sukhwant717 said:
which firmware you are currently on? lolipop or MM? factory reset your device then apply latest lolipop update from sd card
Click to expand...
Click to collapse
timbernot said:
Is your ext. sd being seen in file manager ?
Can you get into 6.0 recovery ?
If yes , you can now downgrade which will reset your fone , With a factory reset in the process , check my signature below.
Your fone not being seen maybe driver issue if other zens too are not being seen...but ..let's see what happens after downgrade.
After downgrade if still slow charge, reboot while connected to charger.
If same prob ..hardware !
Click to expand...
Click to collapse
Thanks, I was not so deeply checking all available options. SD downgrading worked well for me, however the problem still is in the phone. However, I discovered a few positive and negative signs, which tell me that there is something else - could be the connection - after upgrading to MM before the phone was restarted at least 3-4 times the screen was not going to sleep mode after a minute, it was coming back on and on and on again. After 3-4 restarts it behaved normally again. The same thing happened after downgrade to L.
Another positive discovery is that the SMMI test now works well and everything is ok now, before it got stuck on the 1st or 2nd test and was not going any further ....
One more spot, which was very hard to catch as it popped up for a 0,1 second but dissappeared then quickly so I had to record it with the other phone and play very slowly on the PC - it looks like the Asus cover window pops up and it says - move your finger around the circle to get quick access to your preferable apps and there is also a blue button: Do not show again . This is flashing now and then and I do not have Asus Cover, so the behaviour is quite odd to me.
I have a feeling that there might be something with connections, but really I do not know what else - I checked it 30 times and made sure everything was properly alligned and tight when I was changing the PCB with micro USB port.
By the way the other phone works well on PCs, so I must have all drivers installed, it is just the second phone that is half bricked... I'm wondering now if maybe flashing CM 12 or 13 will help, however as it is not rooted probably it will not work via SD card... or? Am I looking in the right direction?

Buddy , its hardware so software tweaks will be useless .

Buddy, we are on the same ****ing boat.
I tried to go back to 6.0,but i got my phone bricked and now i cant reverse it back because i need usb connection to the computer and simply it isnt recognized.
I suggest you to send the phone to the asus assistance centre or to buy a new usb port for your phone,as it is clearly damaged like mine.I need to do it too so if you want to wait me first so i can check if it works,ill maybe save you some money.

RxDave said:
Buddy, we are on the same ****ing boat.
I tried to go back to 6.0,but i got my phone bricked and now i cant reverse it back because i need usb connection to the computer and simply it isnt recognized.
I suggest you to send the phone to the asus assistance centre or to buy a new usb port for your phone,as it is clearly damaged like mine.I need to do it too so if you want to wait me first so i can check if it works,ill maybe save you some money.
Click to expand...
Click to collapse
Well, my phone successfully reversed to Lolipop, and I changed the USB port, I talked to Asus authorised service centre and they said it will cost the price of the phone, so I just give up, as everything works, but not the phone with the computer via USB and not the quick charging. Asus centre said it is a motherboard failure, but I'm asking how is that possible if all other functions work well???

timbernot said:
Buddy , its hardware so software tweaks will be useless .
Click to expand...
Click to collapse
Yes, I see your point, but I cannot imagine how is this possible, when all other things work well on the phone and the SMMI test shows all sensors working properly?

Mattiii said:
Yes, I see your point, but I cannot imagine how is this possible, when all other things work well on the phone and the SMMI test shows all sensors working properly?
Click to expand...
Click to collapse
Ask yourself the same 2 questions again once more
Is your phone recognised by PC ?
Is fast charging working now ?
If answer is no after downgrade .
You know the answer

i changed mainboard and working
well, i have the same problem and i try the following possibility and all unsuccessful.
1. i tried 3 different pcb still no luck
2. i changed sim flex still no luck
3. i changed battery still no luck
4. i changed lcd and digitizer completely still no luck
5. i wiped cache from android recovery MM still no luck
6. i wiped data and factory reset from android recovery MM still no luck
7. i install same latest os (MM) for ze551ml from sd card still no luck
8. i use original ac adapter and cable and tried working different one for every step.
so i want to ask a questions. can it be ground connection somewhere on cases? or motherboard
i am tired but problem found. it is exactly motherboard problem. i bought used original mainboard and all is working.
Note: other mainboard using same android os version so it is not os failure.