My solution to fingerprint sensor malfunction (LG V20 H910) - LG V20 Guides, News, & Discussion

Hello there,
After two weeks of trial and error I got my fingerprint sensor working!
I cut out a piece of thick (resume) paper in the shape of the 10 gold contact pads on the sensor...
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...then taped the paper to the cover using double sided tape (under the contact pads!)
It makes a secure connection between all contact points on the sensor and logic board by applying pressure evenly!
Now I'm back to quickly unlocking my phone! :good:
Hopefully this helps someone! If you need more details let me know.
LG V20 H910 (AT&T)

We have no problems with the fingerprint sensor...

XblackdemonX said:
We have no problems with the fingerprint sensor...
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Good! This post is for anyone having problems. It took me forever to find a solution so I wanted to report my findings to potentially help someone out.

jtay419 said:
My solution was to use thick resume paper to make sure the 10 contact points between the motherboard and sensor are lined up evenly.
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Not sure i quite understood that, You disassembled the phone and put some paper between the sensor and the motherboard ? why does it even work

XblackdemonX said:
We have no problems with the fingerprint sensor...
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Don't think you can say "we", when obviously somebody did have an issue.....
Sent from my LG V20 using XDA Labs

One Twelve said:
Not sure i quite understood that, You disassembled the phone and put some paper between the sensor and the motherboard ? why does it even work
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Yeah I had a feeling I should elaborate more to prevent confusion. Doing that would surely prevent the sensor from working :laugh:
I cut out a piece of thick (resume) paper in the shape of the 10 gold contact pads on the sensor...
...then taped the paper to the cover using double sided tape (under the contact pads!)
It makes a secure connection between all contact points on the sensor and logic board by applying pressure evenly!
I'm definitely gonna add this to my original post. Without the images it doesn't make much sense lol.

Related

[Q] How to replace vibration motor

My vibration motor in the Nexus s broke. Now I want to replace it. I'm planning to order this motor: http://www.tvc-mall.com/details/Replacement-Vib-Vibration-Motor-for-All-Samsung-Models-SAMO-SAM/
I opened up my Nexus to a degree where I could see the motor, but I couldn't see how the wires are connected. Do I have to braze the wires or can I just plug them in or how does it work?
Thanks!
Are you positive it is broken? Mine stopped working on me a few times before. I would tap the phone firmly, powered it off and tap again and reboot. Problem solved. Just a fyi
Sent from my Nexus S using xda premium
http://www.ifixit.com/Device/Nexus_S
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It's soldered
NicholasQ said:
Are you positive it is broken? Mine stopped working on me a few times before. I would tap the phone firmly, powered it off and tap again and reboot. Problem solved. Just a fyi
Sent from my Nexus S using xda premium
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Yes I'm sure it is broken.
Thanks tylerwatt12, for that picture.
Crap I don't have the equipment to solder.
riichii said:
Yes I'm sure it is broken.
Thanks tylerwatt12, for that picture.
Crap I don't have the equipment to solder.
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A 15W soldering iron should run you around $10 US.
I highly recommend soldering wires on random scrap if this is your first experience at soldering or you're gonna end up with a mess.
Edit: Or you can cut the wires, strip the ends, twist them together and solder (then cover them with heatshrink/electrical tape).
Should be easier for a beginner to do this than solder on tiny pads and remove epoxy from a PCB.
polobunny said:
A 15W soldering iron should run you around $10 US.
I highly recommend soldering wires on random scrap if this is your first experience at soldering or you're gonna end up with a mess.
Edit: Or you can cut the wires, strip the ends, twist them together and solder (then cover them with heatshrink/electrical tape).
Should be easier for a beginner to do this than solder on tiny pads and remove epoxy from a PCB.
Click to expand...
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Thanks, pretty stupid, I didn't think of that. I might not even have to solder at all if i twist them together tightly and then bind them with tape.
riichii, have you managed to do it? I'm positive my vibration motor is broken as well, but I cannot find an exact replacement online. A friend of mine had a broken samsung j700 lying around so I salvaged the motor from it and soldered it in my nexus s, but it didn't work (you could hear the motor rattling, but it wasn't vibrating enough, it was less than my broken original motor). I was wondering if the part you linked was working or not. Thanks

Screen Protector Issue (Tips on Buying)

Hey guys, using the Nexus 4 screen protector, There will be a cut-out for the camera and some for the gyro-sensors. If the gyro-sensor is not covered you will have in-call issues with the screen turning off as if it was against your ear. So make sure when you buy you'r screen protector it has 2 cuts on the side, One for the sensor and one for the Camera
Cheers,
Luke
Lukemolina said:
Hey guys, using the Nexus 4 screen protector, There will be a cut-out for the camera and some for the gyro-sensors. If the gyro-sensor is not covered you will have in-call issues with the screen turning off as if it was against your ear. So make sure when you buy you'r screen protector it has 2 cuts on the side, One for the sensor and one for the Camera
Cheers,
Luke
Click to expand...
Click to collapse
This thing has a gyro sensor?! WOW!
One problem, I'm holding my gyro in front of the phone and it won't detect it. Is that because my screen protector is covering the sensor?
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sy224048 said:
This thing has a gyro sensor?! WOW!
One problem, I'm holding my gyro in front of the phone and it won't detect it. Is that because my screen protector is covering the sensor?
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Its called an ambient sensor but meh, you get the point. And yes, your phone has a gyroscope built in, that's what makes photosphere works.
jiayit said:
Its called an ambient sensor but meh, you get the point. And yes, your phone has a gyroscope built in, that's what makes photosphere works.
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I was joking..... I know what it does. And I'm pretty sure the gyroscope isn't even visible, it's inside the phone. But I may be wrong.
sy224048 said:
I was joking..... I know what it does. And I'm pretty sure the gyroscope isn't even visible, it's inside the phone. But I may be wrong.
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Meh I need to improve on my sarcasm skills!

[Q] Camera Lens Repair

has anyone on here had to replace the glass in front of the camera?
basically my friend dropped his Nexus 5 onto some rocks, and it spider-cracked the camera glass. to make the camera kinda usable again, he just removed the broken glass. i'm thinking this is the part needed to repair/replace it:
http://www.amazon.com/Rear-Camera-R...412803080&sr=8-2&keywords=nexus+5+camera+lens
and then follow the first 3 steps over on an ifixit.com guide:
https://www.ifixit.com/Guide/Nexus+5+Battery+Replacement/26009
mrhomiec said:
has anyone on here had to replace the glass in front of the camera?
basically my friend dropped his Nexus 5 onto some rocks, and it spider-cracked the camera glass. to make the camera kinda usable again, he just removed the broken glass. i'm thinking this is the part needed to repair/replace it:
http://www.amazon.com/Rear-Camera-R...412803080&sr=8-2&keywords=nexus+5+camera+lens
and then follow the first 3 steps over on an ifixit.com guide:
https://www.ifixit.com/Guide/Nexus+5+Battery+Replacement/26009
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Click to collapse
Never actually replaced the glass, but it should be pretty easy.
I've striped the phone down to the component parts and re built it before... wasn't that difficult using the iFixit guide.
The only awkward bit is removing the back plate - the glue was really sticky! just be gentle and you should be fine.
the back plate? is this what you're talking about?
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mrhomiec said:
the back plate? is this what you're talking about?
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No, I just meant the back cover. That panel holds the motherboard in place.
krs360 said:
No, I just meant the back cover. That panel holds the motherboard in place.
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i just discovered this kit on Amazon:
http://www.amazon.com/Chassis-Housi...413209575&sr=8-1&keywords=nexus+5+camera+lens
and taking the ifixit.com guide in mind, this seems like the easier part to replace than just the lens cover part. you think?
mrhomiec said:
i just discovered this kit on Amazon:
http://www.amazon.com/Chassis-Housi...413209575&sr=8-1&keywords=nexus+5+camera+lens
and taking the ifixit.com guide in mind, this seems like the easier part to replace than just the lens cover part. you think?
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I don't think it will make it any easier or harder - you would have to take the old one out anyway, and it's just a few extra screws to remove the camera lens.
But it's only a few quid more to buy that part and they both come with free tools, so you might as well.

My Xperia Z3's back cover has been cracked

I've given the phone to my Niece to take some photo and video. When she gave me the phone back, I found it cracked at the back. Not sure how it was cracked. I might be due to excessive heat dissipated while the screen stays on for few minutes. What do you think about it? How I can repair it?
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sameee781 said:
I've given the phone to my Niece to take some photo and video. When she gave me the phone back, I found it cracked at the back. Not sure how it was cracked. I might be due to excessive heat dissipated while the screen stays on for few minutes. What do you think about it? How I can repair it?
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Isn't that tempered glass over your Z3?
You will need this part:
http://www.witrigs.com/custom-back-cover-for-sony-xperia-z3-green
I just replaced the front and back of mine as it cracked on my wife accidentally doing something with the kids.
You will need to transfer your stock NFC sticker/chip to the new cover before installation. This company ships quick and is very reliable. If you do not have the suction cup and guitar pics I recommend it, you will need it for installation. As well as a heat gun or hair dryer.
You can see a how to video towards the bottom of the page I linked.
Good luck.
Jkay7 said:
Isn't that tempered glass over your Z3?
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No, there was no tempered glass in the back. Tempered glass protector is in the front side.
Evil-MOBO said:
You will need this part:
http://www.witrigs.com/custom-back-cover-for-sony-xperia-z3-green
I just replaced the front and back of mine as it cracked on my wife accidentally doing something with the kids.
You will need to transfer your stock NFC sticker/chip to the new cover before installation. This company ships quick and is very reliable. If you do not have the suction cup and guitar pics I recommend it, you will need it for installation. As well as a heat gun or hair dryer.
You can see a how to video towards the bottom of the page I linked.
Good luck.
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Click to collapse
What about the below one?
http://www.aliexpress.com/item/100-...r-battery-cover-back-housing/32280792586.html
sameee781 said:
What about the below one?
http://www.aliexpress.com/item/100-...r-battery-cover-back-housing/32280792586.html
Click to expand...
Click to collapse
That one says Sony on the back so whichever you prefer.

Help me please samsung note 10 plus

Hello my friends
I have a samsung note 10 plus phone that fell, and this caused the appearance of a black spot and it increased in size little by little, and also the screen tactile broke down and now it works with the pen only, please help stop the size the black spot or remove it, and also can the screen tactile be repaired or no, thank you
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Replace the display.
Always use a good case like the Zizo Bolt otherwise this phone will get damaged.
blackhawk said:
Replace the display.
Always use a good case like the Zizo Bolt otherwise this phone will get damaged.
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The price of the screen is very high, my brother, and I cannot buy it. Is there an alternative way to fix it?
bndib said:
The price of the screen is very high, my brother, and I cannot buy it. Is there an alternative way to fix it?
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Replace the whole phone. At least you could use the old one maybe for some parts in the future.
Unfortunately there's no way to repair a AMOLED display as it is comprised of thousands of semiconductors in its matrix that controls the individual OLEDs. The touch screen circuitry was also damaged.
blackhawk said:
Replace the whole phone. At least you could use the old one maybe for some parts in the future.
Unfortunately there's no way to repair a AMOLED display as it is comprised of thousands of semiconductors in its matrix that controls the individual OLEDs. The touch screen circuitry was also damaged.
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Unfortunately, in any case, thank you, my dear brother, for your help, and accept my utmost respect and appreciation
so sad, this happen on mine too
snapdragon teaks said:
so sad, this happen on mine too
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This phone won't survive without a good case. Not much help now, but bear that in mind if you replace it or haven't damaged it yet. With no case they are harder to hold too... slippery fish.
There's almost zero bezel... and the only thing they do more than corner hit when dropped is face plant on the display side. The spen corner seems to take more hits than the other corners too.

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