No Cell Service after Battery Replacement on Nexus 4 - Nexus 4 Q&A, Help & Troubleshooting

First of all, I have moved on long ago, my production phone is a Nexus 6. So with the N4 gathering dust in a drawer, I decide why not take a chance with it. The N4 was fully functional, but like many others had a partially splintered glass back. Years ago I had bought a replacement back that I never installed. So I thought, why not replace the back and with the back off replace the battery as well.
I made one mistake in the process. I didn't realize the battery had a wire taped to its side that that ended in a gold plug that attaches to a socket on the motherboard. When I removed the battery which was glued down I pulled the wire out of the plug. I then soldered the wire back onto the plug, and at least my voltmeter showed continuity.
One I reassembled battery is ok, wifi works, but no cell service. The phone sees the difference between the SIM being in or out, but no service. The SIM gave service before the surgery, and also does in another phone.
I've taken it apart and put it together a few times, making sure the plug is seated in the socket and the there is continuity between the bit of exposed wire and the plug..
One other thing caught my eye. The old battery has a silver foil backing apparently glued to it. The replacement battery does not. Could there be a shielding issue?
At any rate I thought I would ask for any suggestions. The loss of cell connection is not a tragedy. My plan is to use it to play with different roms while sticking with stock on the N6. for my real use.

kmandel said:
...I pulled the wire out of the plug. I then soldered the wire back onto the plug, and at least my voltmeter showed continuity....
Click to expand...
Click to collapse
This wire is coaxial type and because of the size it's almost impossible to repair it correctly.
I would suggest to buy a new one, form here:
https://www.spareslg.com/gb/cabo-coaxial-lg-e960-nexus-4-ead62290101.html
or look on ebay/aliexpress/google/etc. for part number: EAD62290101

Related

Wireless charging solved

This makes the phone much more enjoyable. Take a look.
http://www.youtube.com/watch?v=FQ-KUgDNrwM
Whole phone
http://www.youtube.com/watch?v=vMWgaSfwSrI
You keep posting links to this video, but is there a step by step guide for this method? Looks awesome BTW. I found guides using wire and using the copper tape on the Nexus, but none that put it all together for this phone. I have several touchstone and my Palm Pre back, but am going to try the Pixie back.
Thanks so much! The pixi back is best because the positive and negatives line up with the phones positive and negative. The pres back has the negative on top so its more difficult.
http://www.youtube.com/watch?v=FQ-KUgDNrwM
Whole phone
http://www.youtube.com/watch?v=vMWgaSfwSrI
I saw your posts/videos over in the international thread. Finally got my stuff in yesterday to try this out and got it all working today. So far the touchstone seems to work great and there is only very minimal bulge showing in the back (small enough that unless you point it out most people wouldn't notice it)
Great job. Any pics? You live so close to me. Lol
Here are some pictures.
As you can see there is almost no bulge. It can only really be seen when reflecting light off the back's glossy surface.
I used the pixi coil and some copper tape. The hardest part was getting the proper placement of the contact points.
<facepalm>
I was just going to post how my NFC stopped working after I did this but just found that NFC got turned off on my old GS2 (only other NFC device I have to test with)
Turned it back on and everything works....
</facepalm>
so is there a how to or a site you can buy the modded back covers or something other then pics?
would be nice to let everyone know.
So sorry blownco as there is no tutorial as i did not personal mod my phone. I bought a spare cover that i will try and mod myself as soon as i receive my rare earth batteries.
Pmentior greay job with the mod. Looks so clean too!
BLOWNCO said:
so is there a how to or a site you can buy the modded back covers or something other then pics?
would be nice to let everyone know.
Click to expand...
Click to collapse
**Update**
I have removed this mod temporarily as I was have some issues with the connection between my pixi coil and the copper tape. I should have this fixed in the next couple of days. Use the following steps as a frame work for your own mod not as a comprehensive guide!
**Update 2**
I have redone my mod and have updated this posted with new or modified steps.
My new build adds a little more bulge due to using a shot section of soldered wire.
There isn't really all that much to it.
Material needed:
Galaxy S3 (obviously)]
Palm Touchstone - I got the kit that includes the power supply and usb cord because some people have been having trouble with using other cords
Palm Pixi Touchstone Back
Copper Tape
Soldering Iron
Other Materials:
Double Sided Tape
Electrical Tape
Steps:
1) Peels the Coil out of the Pixi Back
After you get the black sticker off you will see all the pieces of the coil still stuck to the Pixi Back.
The 4 small metal disks spaced around the coil are important so move them too.
Carefully remove all these pieces and reassemble them back onto the black sticker
Tip) I used the touchstone base (Unplugged!) to help align the metal disks correctly. This helped the magnetic attachment between the phone and the dock. Just reassemble the coil assemble on the touchstone dock and the magnets in the dock pull the disk into the correct place on its own.
2) The copper tape is used to 'move' the leads on the Pixi back to the correct position so they line up with the contact points of the GS3
Don't let the 2 leads touch each other!
You need to add a little cushion under the ends of the copper tape so they connect properly.
3) Required step:The contact between the original pixi contact point and the copper tape needs to be soldered to maintain the connection.
Note) I had trouble getting the copper tape soldered directly to the pixi contact point. I used a small wire to connect the pixi contact with my new copper tape contacts. The wire was scavanged from an old extra USB cord I had laying around.
4) Use some electrical tape to cover the soldering points to make it look nice and to reduce risk of shorting.
5) Put the GS3 back back on and check the fit then place the GS3 on the touchstone and see if it works.
6) Adjust positioning if needed.
**edit**
I just went off the pictures/videos stu5797 has posted.
I may have missed something as I wrote this from memory of what I did. The mod was a lot of trial an error as I only went off of a few pictures.
What did you use to make the bumps for the contacts?
I just used a little bit of wadded up electrical tape underneath the copper foil. So far that part at least has made consistent contact.
I have been have trouble with the connection between the coil and the copper tape (this connection is under some black electrical tape in my picture, not the part that has the cushion under it.)and need to work on that the next few days. It will probably be solved with a bit of soldering (no modification will be done to the main part of the phone only the back cover and will be fully reversible) as I was too lazy to do it that way the first time.
i'm hoping that somewhere deep within China some eager little entrepreneur is making a cheap back cover that has the contacts already in it and they will appear on Ebay shortly.
Don't really want to wait until September for the Samsung and the thought of rigging it myself with tape and thin wires makes me nervous.. i take the back cover off too often to change out batteries and figure eventually i'd cross the wires and maybe ruin the phone.
Just ordered a pixi back and touchstone for about 8/9 bucks shipped on Amazon.
Unfortunately soldering is needed on the pixi back with copper tape to give the phone a constant great charge. Dont forget to get magnets and copper tape
I was hoping to avoid soldering with my first install. It work great for a while but then started to lose connection. I figured that I was probably going to have to solder it so I ordered 2 pixi backs to begin with in-case I screwed one up.
I don't think adding more magnets are really a good idea. Adding them to the phone will probably mess with the compass pretty badly. The touchstone system has the mags built into the base and just some metal pieces in the phone. If I can find something to replace the tiny metal disks in the cover though it should help keeping the phone onto the dock.

Any hope in repairing pin on battery clip?

I'm not sure if my title makes any sense, so I will further explain here. I had to repair my charging port, while doing so I must have damaged the clip that the battery plugs into. It looks like a pin or two (that is soldered to the mobo) is a bit loose. My phone does not charge but will function when plugged in. I bought a replacement battery thinking I damaged that, when going to install I noticed the loose pins. Went through with the install anyway, and phone acts the same.
Is there any hope for my to resolder the pins back to the mobo? I want to get some input before I buy a soldering gun etc.
A1will said:
I'm not sure if my title makes any sense, so I will further explain here. I had to repair my charging port, while doing so I must have damaged the clip that the battery plugs into. It looks like a pin or two (that is soldered to the mobo) is a bit loose. My phone does not charge but will function when plugged in. I bought a replacement battery thinking I damaged that, when going to install I noticed the loose pins. Went through with the install anyway, and phone acts the same.
Is there any hope for my to resolder the pins back to the mobo? I want to get some input before I buy a soldering gun etc.
Click to expand...
Click to collapse
Resoldering battery connectors is normally a very difficult job, best to take it to someone experienced. If the solder pad is gone too you'll definitely need a professional.
DrFredPhD said:
Resoldering battery connectors is normally a very difficult job, best to take it to someone experienced. If the solder pad is gone too you'll definitely need a professional.
Click to expand...
Click to collapse
What makes it so difficult?
Or by me asking do I show that I'm in over my head? lol

Any fixes for broken charging port?

Hey guys
Like many others my usb gone bust and my advent tn7 just became useless. Ive went to curries and explained about how this is a common issue but they dismissed it saying a broken charger port is my fault. I have searched several forms but still havent found any way of fixing it. Does anyone know how to get my tab to charge? Ive tried opening the tab but one side of it doesnt seem to come off. What are my options if any? Any help will be greatly appreciated. Thanks.
Abdur Desai said:
Hey guys
Like many others my usb gone bust and my advent tn7 just became useless. Ive went to curries and explained about how this is a common issue but they dismissed it saying a broken charger port is my fault. I have searched several forms but still havent found any way of fixing it. Does anyone know how to get my tab to charge? Ive tried opening the tab but one side of it doesnt seem to come off. What are my options if any? Any help will be greatly appreciated. Thanks.
Click to expand...
Click to collapse
The best option would be to take it to a repair shop... it might cost you $50, but hopefully they can replace it with the right USB port (the one Nvidia used is slightly different from most micro-USB ports you see on devices, so it's not a very snug fit, hence the problem.)
I have the evga tn7 that i bought from newegg. Would they still honor my warrenty on the broken charging port even though I have my bootloader unlocked?
jon7701, I was thinking the same thing. I bought mine a couple of months ago and the charging port is being a little finicky.
share_needles said:
jon7701, I was thinking the same thing. I bought mine a couple of months ago and the charging port is being a little finicky.
Click to expand...
Click to collapse
Mine has to be plugged in a certain way or it refuses to charge outright. Even when I have it in the proper way it might not charge at all but reports its charging. The strange thing is that it can still detect what type of charging method (usb or AC) im using even though it wont charge.
I was able to fix my EVGA Tegra Note 7 usb connector using a re-flow soldering station (the type that uses hot air to melt solder), and it only took about 30 minutes. If you know an electrical engineer or serious electrical design enthusiast, they may have one. The problem is caused from the solder joints on the usb connector breaking. All I had to do is re-melt the solder and the problem was fixed. You cannot use a normal soldering iron because there are other components in the way. This happens on the Tegra Note because Nvidia specified a Micro-ab type connector instead of the Micro-b connector that most phones have. This allows accidental upside down insertion to damage the connector.
All you have to do is snap the plastic case apart, carefully remove the small circuit board that has the usb connector. The solder joint appears solid, but I was able to see the crack with a microscope and a trained eye. Use hot air to melt the solder, and resemble. Now I am just careful to plug the cable in right side up. If it breaks again, I am replacing it with a Micro-b connector.
I like having a re-flow soldering station. Every hacker should have one for replacing surface mount components and more extreme hacks (like upgrading internal flash, etc.).
sorry for necroing this post but i'm having the same issue. i've thought the same as you of replacing the port with a micro b. i have only one question: is there any problem with replacing it with a micro b? or no problem at all
Digging up this old thread to post link to UK service for Nvidia Tegra Note 7 Micro USB Charging Port Repair Service,
Here:- http://www.mobiledeviceworkshop.co....o-usb-charging-port-repair-service-3080-p.asp
Charge of £29.00 all inclusive of return delivery (+£5.00 for next day delivery)..
EDIT: Think this is same part for Nvidia Tegra note 7 (ebay, £1.29).
New HP SLATE 7 HD Replacement Micro USB DC Charging Socket Port Connector
http://www.ebay.co.uk/itm/New-HP-SL...cab7f36&pid=100005&rk=6&rkt=6&sd=131877863523
EDIT: Some spare parts, Cherry Mobile Tegra Note 7 Spare Parts & Accessories
(Indian version Tegra note 7, presumably mostly same as Advent, but seems to have built-in internet, prices in Rupees)
https://www.maxbhi.com/cherry-mobile-tegra-note-7-spare-parts-and-accessories.html
Thanks
ad1876 said:
I was able to fix my EVGA Tegra Note 7 usb connector using a re-flow soldering station (the type that uses hot air to melt solder), and it only took about 30 minutes. If you know an electrical engineer or serious electrical design enthusiast, they may have one. The problem is caused from the solder joints on the usb connector breaking. All I had to do is re-melt the solder and the problem was fixed. You cannot use a normal soldering iron because there are other components in the way. This happens on the Tegra Note because Nvidia specified a Micro-ab type connector instead of the Micro-b connector that most phones have. This allows accidental upside down insertion to damage the connector.
All you have to do is snap the plastic case apart, carefully remove the small circuit board that has the usb connector. The solder joint appears solid, but I was able to see the crack with a microscope and a trained eye. Use hot air to melt the solder, and resemble. Now I am just careful to plug the cable in right side up. If it breaks again, I am replacing it with a Micro-b connector.
I like having a re-flow soldering station. Every hacker should have one for replacing surface mount components and more extreme hacks (like upgrading internal flash, etc.).
Click to expand...
Click to collapse
Thanks a lot for your correct advise.
I had a long battle getting my Xolo Tegra Note fixed in Pune.
Xolo service center people told me that because I have down graded my tablet to KitKat, now motherboard is gone. After that I went to local mobile repair shop, he told me it's very difficult fix this as the joint are very small and soldering can damage other things as well.
After visiting a few repair shop in Pimpri market, I found a guy who did it. I found the same issue of minor crack which he found using multiple magnifying glasses.
It's better to visit a good repair shop not a small one as the issue won't be visible without magnifying glasses.
Let me know if anyone wants to get it fixed in India, Pune. I will share the mobile shop address.

New way for magnetic charging port to break

Typically the issue on our phones is that the magnetic port pulls out after a lot of use. I had this and I superglued that sucker back in. Now, I have a whole new issue. One of the little nubs with the metal contact completely came off! I seriously have no idea how they could have happened. It's hard to describe but I'll take a picture when I can to show this. The annoying thing is that I superglued this one in very well. I would have to seriously risk breaking more things to pry this one off to replace it! Despite no update to marshmallow (D6616) and these crazy build issues I still don't see a compelling new phone to replace this one -_-.
Pics. Initially, the little metal circle was gone. I scraped away the rest of the little black circle to expose the little bit of metal that is still sticking out. I can still use the magnetic charging port as long as I carefully attach it in a way that the little metal piece makes contact with the charger.
Please make a photo of your magnetic cable connector too
When the microphone of my z3 broke, the service changed all the frame of my mobile.
i was so happy, my old magnetic charging port was very worn out (almost like your picture)
I blame users using cheap magnetic cables bought from ebay and amazon because of this. Magnets can be super strong, strong, medium, and weak. Mine has been fine since owning the phone Dec 2014. I use the Sony magnetic dock and always charge on it. The only problem I have is that it needs a backbone to charge because DUE TO MY FAULT, when the phone dropped, it bent the trim area of the magnetic port.
People always need to point fingers at everyone besides themselves.
lvlonkey said:
Pics. Initially, the little metal circle was gone. I scraped away the rest of the little black circle to expose the little bit of metal that is still sticking out. I can still use the magnetic charging port as long as I carefully attach it in a way that the little metal piece makes contact with the charger.
Click to expand...
Click to collapse
By the condition of your phone from the pics you posted I'm not surprised. I have 2 magnetic chargers and non have this issue. The magnets are relatively weak - just strong enough to hold the cable to th phone while moving it around - and I've not experienced any issues although my charging port doesn't look near as haggard as the ops.
Sent from my D6603 using Tapatalk
I use the magnector connector which is what initially caused my magnetic port to pull out. My magnetic port looks all jacked up because I superglued the port back in but got messy with the glue and had to scrape some off. Anyways despite how messed up my magnetic port looks, the rest of my phone is actually pretty much in new condition. I have had it in a case all its life and a glass screen protector.

How hard is it to destroy the V20's Type-C connector phsically?

How much force would I need to exert for the connector to break? I'm asking this because I've heard that the connector isn't replaceable without replacing the entire motherboard, and I'm a bit paranoid about it breaking:silly:. Thanks in advance!
p7810456 said:
How much force would I need to exert for the connector to break? I'm asking this because I've heard that the connector isn't replaceable without replacing the entire motherboard, and I'm a bit paranoid about it breaking:silly:. Thanks in advance!
Click to expand...
Click to collapse
Owned g3, g4 and now v20. Totally normal to ask about this. Even if you protect your phones with cases and tempered glasses, two primary weak spots remain: motherboard battery contacts wearing out and breaking off (happened to me on my G4) and USB-C troubles. As both the battery connector and the USB-C port are soldered onto the motherboard, even if your phone is under warranty, the only fix is installing a new motherboard, losing the data (back up your data often!) As I was explained in the service center, taking the parts off the motherboard and soldering the new ones back on (that's only if you have a donor motherboard or parts to begin with) results in heating the surrounding circuitry area to the temps of up to 400c, risking damaging the metal tracks (or ripping the seating metal pucks for the parts off the board altogether on removal).
Since the g4 mishap, my solution for effectively protecting the USB port from wear, pulling and yanking damage is the permanent (but easily removable) magnetic USB-C insert that lives in your phone all the time and has magnetic studs on the outside plane that the charging cord snaps to. There are several manufacturers of those on Amazon, none are perfect but any of them is better than using your port "raw" daily. WZKEN makes tangle-free USB-C cords with strong contact between the insert and the cord. The cords (at least in my case) support Qualcomm quick charge 2. When connected through a WZKEN cord, my Anker QC2 charger plug changes light from blue to green to indicate QC and my phone notifies me QC is on, so the QC handshake works as expected.
One thing though if you go the magnetic rout - order MORE inserts than cords, if your USB-C port is loose, the inserts might fall out every once in a while, you'll lose them. Also I haven't seen any magnetic cords with light indicators that change color when QC kicks in, all the light shows is that there's electricity in the port on the wall charger that your cord is connected to. Also, WZKEN cord heads snap to the inserts the right side up only, not on either side.
Whatever the quirks, beats the every day pounding that USB-C ports take by far, especially knowing v20 doesn't charge wirelessly! Inserts are small enough to fit into all port cutouts on all cases I have, so no problem there, either.
The solution is so simple that I charge most of the micro-USB and USB-C devices in my house this way.
p7810456 said:
How much force would I need to exert for the connector to break? I'm asking this because I've heard that the connector isn't replaceable without replacing the entire motherboard, and I'm a bit paranoid about it breaking:silly:. Thanks in advance!
Click to expand...
Click to collapse
Very very hard.
Sent from my LG V20 using XDA Labs

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