[GUIDE] Nexus 7 Motherboard Pin Repair (WiFi, Bluetooth, NFC) - Nexus 7 Q&A, Help & Troubleshooting

I've had my 32GB Nexus 7 2012 (grouper) since it was released. I love it, or well, I did. Until about 12 months ago, the WiFi reception and speed plummeted into what may as well be hell in the stone ages. I couldn't find the problem. I thought it was something to do with software, as I had recently upgraded to a newer version of Android at the time. So, I dismissed it, and waited patiently for a fix. Nothing. So, it has been sitting there since KitKat was released, doing nothing.
Until now that is! I decided that I didn't want to look at it doing nothing anymore, so I researched far past page 2 of Google (Desperate times people, desperate times...) and I found this gem!
I strongly recommend you DO NOT perform that guide. It can damage your device even more. Instead, please use the guide below:
YOU WILL NEED:
Small knife or Electronics opening tool
Soldering Iron (Sorry)
Solder
Basic soldering skills
[URL="http://rover.ebay.com/rover/0/e11400.m1842.l5919/7?euid=f15f56b658ee4efebf0c8f34c466567e&loc=http%3A%2F%2Fpayments.ebay.co.uk%2Fws%2FeBayISAPI.dll%3FViewPaymentStatus%26transId%3D472422032026%26itemId%3D390820734137%26qu%3D1%26ssPageName%3DADME%3AL%3AOC%3AGB%3A5919&exe=11193&ext=27012&sojTags=exe=exe,ext=ext]Contact Fingers (As many that are broken on your device)[/URL]
Right, lets get started...
(Oh yeah, and to make sure you can't sue me if you mess up, I am not liable for any damage you cause to you or the device you're performing this guide on. This may also void the warranty on the device you are performing this guide on)
BEFORE YOU BEGIN!!!
Turn off your device
Ensure that your device is unplugged from any power source
1) Open the Nexus 7 carefully.
2) Find the broken contact(s). The red circle in the picture below annotates where one of the WiFi contacts is broken.
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3) Put the replacement contact finger(s) in place
4) Solder the new contact(s) onto the motherboard ensuring that the solder is only touching that contact
It's important that the solder is only touching one piece of metal, as otherwise the circuit will be shorted and your device may be damaged.
If you have messed up the soldering, there are tools to remove the solder, or you can re-heat it and try to wipe/scrape it off. The tool you want heats up, and sucks up the solder off the circuit board.
5) Leave the device for at least five minutes
6) Once you have left the device, check to see if the angle of the new contact is the same as the other ones. If not, gently bend it into place.
7) Place the casing back onto the Nexus 7, and press to lock it into place
8) Boot up your device
And that's it, you're done!!!! If this guide helped you, press thanks, and if you're feeling generous, donate
JJE990

Broken Link
Hi,
The link you have provided is no longer valid, I just thought that I would see what I could find and this is one of them:
hypertext protocol:worldwidewebdotdigikeydotcom/en/product-highlightslashwslashwurth-electronicsslashwe-secf-emi-contact-fingers
I can not be sure which one to choose. I see one very similar to what my N7 has just not 100% certain that it would be correct one and or fit.
Regards,
T

how does this apply to NFC? my NFC is not working and i opened the case, saw one pin was bended (NFC section PIN), tried to put it back up and it broke. You think that by fixing the pin will it work again?

st-ivan said:
how does this apply to NFC? my NFC is not working and i opened the case, saw one pin was bended (NFC section PIN), tried to put it back up and it broke. You think that by fixing the pin will it work again?
Click to expand...
Click to collapse
Why not? If that was the reason and you rectify it, it should work.

Related

Getting no signal after a hard fall

Anyone can help me, my TyTN fall from my home stairs and I can't get signal after that.. I checked at the "Device Information" in the setting and it shows no Radio ROM.. so I try to install the radio ROM but im getting error during the installation.. I believe it is the hardware faulty and appreciate if anyone knows what is it and where can i get the replacement of the hardware..
FYI.. my TyTN can still be operated, its just cannot get the signal..
Thanking everyone's help in advance....
i'm not sure if you resolved the issue or not, but i'm selling an AT&T 8525. I'll sell it to you for $300 shipped as long as you live in the usa.
I'm not familiar with the insides of the phone, but there are a few options. 1, open it up and find out what's wrong. There could be a connector or circuit that broke and would only require minimal effort to fix. 2, find out if HTC can repair it for you through non-warrenty repair. 3, buy another phone online(like through ebay) that's only good for parts and use it for repairs.
Of course, if you don't feel up to opening it up, you could always find a friend or repair shop that might be willing to try.
ok one of these days i am going to write a book on how to re-attach antennas as the one in the TyTN is similar to the herm100 i presume
you cant miss it, its a big gold rod that slots into a V clip on the main board, a serious jolt could pop its loose, but it wont take much to pop back in, just be careful when you put the cover back on
Yep, there it is top left
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And here it is disconnected.
However, I'm not convinced there is sufficient space available for that pin to disconnect while the casing is in place. My fear is a more destructive M/Board fault.
Mike
he could have shatterd the V clip off the board
It's more likely the golden connector from the picture got disconnected than that a board or chip broken. It would require the CASING to break in order for the board to break.
Open it up, take a chance. It's not so hard, just scary the first time.
alkizmo said:
It's more likely the golden connector from the picture got disconnected than that a board or chip broken. It would require the CASING to break in order for the board to break.
Open it up, take a chance. It's not so hard, just scary the first time.
Click to expand...
Click to collapse
We could take bets on what it is! No that wouldn't be fair would it
I agree it's worth opening up to check the connection. Depending on how hard the fall was it could be a variety of things. Don't agree that the motherboard can only crack if the casing breaks though - I've seen many examples of cracked m'boards and hardly a scratch on the case.
The OP seems to have disappeared anyway!
Mike
Thanks for the replies.. i've just been busy lately..
Will try your suggestion later to check the golden connector 'coz i've been opened it up many times already so its not a scary things to do for me...
will report back the results
hey again mates..
I already check on the golden connector and it seems fine.. everything is in contact and no physical crack was found or whatsoever...
I believe my TyTN is having the same problem with the one in this thread because I have similar symptoms like
1/ i can't flash radio back (the process hang in a middle of the flashing progress).
2/ there's no Radio & Protocol version in the "Settings->System->Device Information"
3/ no IMEI in the "Settings->System->Device Information"
Anyway, Is there a way to write the IMEI no. for the TyTN? maybe if there is an IMEI no. in the TyTN then can I flash the radio ROM.. i think.. and its worth trying (if possible) . or maybe its a hardware problem like in the thread above...
same wif my herm100 hard fall and no more signal
think tat is crack in gsm chips,u just look forward on gsm chips to replace ur old 1,then should be fine and work well ^^

Is this possible? (component replacement)

I have a working TMOUS HD2 motherboard which have a "broken/ripped off" lcd connector.
I also have a non working/bricked TMOUS HD2 motherboard complete and without any physical problem.
Is there any possibility to replace this connector?
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Any help would be much appreciated.
Is the part here?
http://www.alibaba.com/showroom/parts-for-htc-hd2.html
I highly doubt it. That connector is more than likely surface mounted with little tiny pins soldered to the other side of the board, and would be amazingly difficult to remove and replace correctly by hand.
That's what I thought...
But it seems that I don't have nothing to lose...
I even have a third broken motherboard (also with a ripped lcd connector) where I can test the "removal" an "relocation" of the component. I know it's difficult, but there is too much to win and almost nothing to lose.
Any tech approach would be appreciated.
I tried to remove it with a heat gun.
It was VERY EASY and the removal was perfect!
Next I removed a good lcd connector from another phone (also without a problem) and that's where the problems began.
Soldering with a heat gun, which is not designed for precision work is like killing a bug with a bazooka... you will kill the bug but you will break something else...
End of story... ended with 2 non working motherboards and learned that I need a reworking station for this kind of work.
its easy I done them so many times without fail
MGA2009 said:
I tried to remove it with a heat gun.
It was VERY EASY and the removal was perfect!
Next I removed a good lcd connector from another phone (also without a problem) and that's where the problems began.
Soldering with a heat gun, which is not designed for precision work is like killing a bug with a bazooka... you will kill the bug but you will break something else...
End of story... ended with 2 non working motherboards and learned that I need a reworking station for this kind of work.
Click to expand...
Click to collapse
its easy and done it many times sorry you couldn't done it
Tips on how to replace the lcd connector on logic board
dan18 said:
its easy and done it many times sorry you couldn't done it
Click to expand...
Click to collapse
Sorry but can you assist some of us with the same problem in few short tips before I destroy my motherboard too
I might be wrong but is it just the clip that is broken? Do the contacts still connect? It might be possible to glue a thin strip of metal to the plastic ends of the motherboard's connector to hold the ribbon cable connector in place. Might work

Power and reset button!

Somebody probably already found this, but the mojo actually has a power and reset button under the hood
Sry for the dusty pic
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Nice. Could you please post more images of the opened device and maybe a description on how to open the MOJO without damaging anything?
Open the mojo
First of all, BE CAREFUL, I'm not taking responsibility if you crack something or drive a screwdriver through the motherboard, not that its likely but still
1. Disconnect everything from the device.
2. Orientate the device upside down and rotate it so the ports are away from you (easier to explain some of the steps)
3. Remove both rubber feet, the one next to the ports hides the four clasps in the picture below, the other one hides one screw that needs to be removed.
4. Grab something small, flat and a little wide (like a flat screwdriver)
One a time, press the clasps down and away from you.
At the same time grab the edge above the ports (the bottom plate) and bend it a LITTLE upwards so the clasps comes out a little easier.
4. When the four clasps are out of the sockets and the screw is removed from under the other rubber foot, you basically can open the whole thing like a clam.
Just be careful with the ports, especially the audio jack, it sits on a mini pcb inside and seemed a little fragile.
When you opened it so the ports are free, some force has to be applied. On the opposite side, inside the shell there are two more clasps that will resist.
I just kept opening it like a clam and the two pieces separated, everything intact.
5. Done!
I removed the motherboard from the bottom plate, the only things under there was the soldering points of the ports.
I also removed the heatsink, nothing exciting. (I dont recommend this because of the thermal compound between the cpu and heatsink)
The power and reset button
This was the most exciting thing I found, there was a button under the usb3 port, can figure out what it does though, if I hold it in under boot, the device wont boot.
PM me if you cant figure it out!
Why Mad Catz wouldn't put a power and reset button on the outside of the device is beyond me. I wish there was a way to power on and off from the controller...
But this is a nice find! I might have to mod an external switch, if that's an option...
Wow. Thank you for your explanation! :good:
Hey, Thanks...I heard about that before, but the Instructions and pics are great! I think I'll be tearing mine open this weekend & figure out how to expose those 2 buttons.
Seems one could drill a couple small holes in the case and put a couple small plastic pins as button extensions. Possibly the shafts from a couple of golf tees?
Does anyone know which button does what? and will the reset start it back up after being turned off with a software switch?
About the third button: will the MOJO not boot at all with it pressed, or does it boot into fastboot?
Hello all, I'm thinking to tear down mine and I might change the case for my Mojo. Not sure if I'll add a fan with a switch to toggle it on /off, and planning to expose those power buttons too. Has anyone done something similar? Maybe there are some 3d printer schemes somewhere on the net, I could not find any though. Thank you very much!
Hi yes it happened! my audio jack came off! will that stop the sound coming through the TV?
colks said:
Hi yes it happened! my audio jack came off! will that stop the sound coming through the TV?
Click to expand...
Click to collapse
No as long as your sound is going through the HDMI.

Help identifying components on Nexus 6Pmain board

I'm wondering if anyone can identify the two components circled in red in the lower right corner of this image?
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I recently replaced the screen on my Nexus 6P, but these two component came loose (likely from when I took off the screen connector below them). One of them was lost as well.
After replacing the screen everything seems to work ok except that the Sim card is not detected. (The same sim works in other phones.) I'm suspecting that these two components are the issue. It's pretty likely that I would not be able to successfully replace them, but then again it might be worth trying.
Any thoughts? Thanks!
Your image link don't work..
But btw, why did you replace it? Broken?
I hear it's a very difficult and risky process to replace screens on 6P..
Sent from my Nexus 6P using Tapatalk
I just updated the image in the original post. I think it should show up now.
I dropped the phone from about two feet up and the touch screen quit working. Replacing the screen was a bit daunting, but actually seemed to go quite well until I figured out the sim was not recognized any more. It was a bit tough to pry off the camera shield on the back and to pry the insides from the body the first time. But now I can do it without too much trouble.
I think that the two parts I wan to identify might have been a bit damaged before (water damage?), and then I might have inadvertently helped them along.
balesse said:
I'm wondering if anyone can identify the two components circled in red in the lower right corner of this image?
I recently replaced the screen on my Nexus 6P, but these two component came loose (likely from when I took off the screen connector below them). One of them was lost as well.
After replacing the screen everything seems to work ok except that the Sim card is not detected. (The same sim works in other phones.) I'm suspecting that these two components are the issue. It's pretty likely that I would not be able to successfully replace them, but then again it might be worth trying.
Any thoughts? Thanks!
Click to expand...
Click to collapse
I can't see your image for some reason either on Tapatalk but I can in web view. Check ifixit for a full outlook of internal parts:
https://www.ifixit.com/Teardown/Nexus+6P+Teardown/51660
Edit: On second thought, the piece you're asking about wouldn't be discussed by them.
Sent from my Nexus 5X using Tapatalk
That's gonna be tough with no markings on the board or components. Google "identify smd components" might yield some helpful results. I think they are either smd resistors or fuses. As a last resort bridge the connections individually with solder or conductive glue. Check with multimeter after you bridge them to insure no resistance (good connection). Really looks more like those are components for the display circuit though.
normally those are some resistor smd.
you can check on other phones (service manuals) what kind of component is there.
i saw a service manual for lg g3 here on xda, you can check whatever you want but try to search for a component like that.

Axon 7 Repair

I dropped my Axon 7. Though there's no visible damage, the phone will frequently freeze (not turn off) and just continue to display whatever was on the screen at the time. Or the the charging LED will remain on if it was just charging and not actually booted, even if I unplug the phone.
I opened it up and reconnected all the cables, but no luck.
Once it starts, if left gently on a table it will continue to run, but if I jostle it it will likely freeze.
I've been experimenting and know I get the same behavior if the phone is running on AC with the battery disconnected (I think that worked...) , or if I run unplugged with the battery.
Any ideas? Since I already have the phone open and don't much have to loose, I'm willing to attempt more surgery, but I'm not sure how to diagnose the fault. (Yes, past the 2 year damage warranty).
Happy for your thoughts and suggestions!
There was a post on here with the exact same scenario, if I remember correctly it was a cable to the screen/display.
I've dropped phones and sometimes the pins bend slightly so check the connection pins.
I even repaired one that fell into a bowl of milk
found something?
Syberclone said:
There was a post on here with the exact same scenario, if I remember correctly it was a cable to the screen/display.
I've dropped phones and sometimes the pins bend slightly so check the connection pins.
I even repaired one that fell into a bowl of milk
Click to expand...
Click to collapse
Ok - What do you think about this? I can't tell if this is superficial. ($20 USB microscope I bought for my kids rocks)
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Assuming this is the issue, does replacing this cable mean removing the screen? I've heard that's hard...
I can't see from the pic properly but it is possible, the only way to know for sure is to compare with an original condition unit. (Looks better than some I've seen)
I was fortunate enough to have the same phone as a backup so I could check in my case.
Just make sure all connectors are snapped into place and no broken fragments in the connection.
I hope you get it sorted
Some pics of a brand new screen taken with my Axon and a small lens i had lying around
Syberclone said:
I can't see from the pic properly but it is possible, the only way to know for sure is to compare with an original condition unit. (Looks better than some I've seen)
I was fortunate enough to have the same phone as a backup so I could check in my case.
Just make sure all connectors are snapped into place and no broken fragments in the connection.
I hope you get it sorted
Click to expand...
Click to collapse
Just in case it wasn't clear what I was was keying in on.
dabramov said:
Just in case it wasn't clear what I was was keying in on.
Click to expand...
Click to collapse
That's in the outermost part, it will surely not cause anything at all...
Choose an username... said:
That's in the outermost part, it will surely not cause anything at all...
Click to expand...
Click to collapse
I was afraid of that. Back to the drawing board... or just wait for good Black Friday deals.

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