Is my fingerprint reader dead? - Moto Z4 Questions & Answers

I just bought a refurb one on ebay, so i'm kind of thinking it's the case.
When I go to setup the fingerprint reader, the symbol comes on the screen and when I press it, the icon turns green for like half a second then goes black again. No matter what direction i press it only turns green for an instant but never recognized that i'm trying to register my fingerprint. I checked to make sure there wasn't some screen protector on but i have no idea what else. I grabbed all the updates as well.

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Cannot boot S710

Hi all.
My screen was broken so I ordered a new one. Finally got it and I tried switching it myself.
Got the Vox service manual and following the steps I changed the broken screen with the new one.
Now I have a problem.
Before I changed the screen, the S710 would boot, I could even make/receive calls although the screen was broken.
Now, after I replaced the screen, when I hold the power button the green light lights, after I let it go it shuts off and nothing happens. No vibration, nothing.
Any idea?
Looks like the SIM card door is not handling the switch properly in there. Try to open/close the SIM door and see if it works then.
I love you tobbbie!
I was going to break it in pieces and the problem was so easy.
Thanks alot!
Thank You tobby! Your small post was big help! Respect!

Weird Korean writing on screen

Sitting in a theater, trying to keep the screen from coming on, when suddenly I got 2 lines of Koren on the screen and a button on the bottom in blue labeled OK. Took the place of my watch face. Had to turn it off and on to get rid of it. Did NOT hit OK. Anyone seen that before?
It is used by MRTIMEMAKER appwhich has a non-loclized part in it.
It just states to accept the recently chosen watchface. Pressing OK just loads it to the screen

SM-N915T green screen and then bootloop

So my T-Mobile Galaxy Note Edge (SM-N915T) running rooted Android 5.1.1 just encountered the infamous green screen seen. The first time, the green screen disappeared after entering sleep mode and waking up, then about 5 minutes later, the green screen stayed, even after a full reboot (even the Samsung bootup animation, download mode, and TWRP were tinted, so I think we can rule out software issue). The phone was still navigable and usable, just with a serious heavy green tint, curiously, the phone would change between the heavy green tint and a grey tint, and the tint would stay on the upper 30% of the phone and turn grey as it entered sleep mode, almost as if the phone was trying to correct the display or something was barely making contact inside the phone.
Then the green tint got more intense, I could make out the basic background, the fingerprint scanner let me past the lockscreen, and the S-Pen sounds would still play when the S-Pen was removed, inserted, and when the screen was touched. Additionally, my PC does not pick up the Note Edge, yes I have the Windows drivers installed, USB debugging enabled, and MTP + ADB enabled via the secret menu in the dialer. Also OTG is down, my mouse and keyboard are receiving power, but no longer recognized.
Now, after another reboot, the phone is stuck in a bootloop, with the Samsung and T-Mobile sounds playing over and over again, there is a green tint when the Samsung logo should be playing, but a dark screen (as in, AMOLED off) when the T-Mobile animation should be playing.
The phone can't even properly boot into download or recovery mode anymore.
The phone wasn't exposed to heat or pressure, it was just charging off an ASUS power brick and a LG microUSB cable (and was relatively cool, not hot).
The phone was bought second hand, KNOX is tripped, and well past the warranty period.
So my questions for everyone here:
-Any idea what the problem is? GPU failure? Bad solder? Short circuit? Screen failure?
-Any hope? I heard someone else was able to get rid of the green screen after freezing the phone, but at the same time, I don't want to risk condensation inside the phone if I don't have to, and if it was melted solder from some sort of charging issue, heating the phone would probably be a better solution.
While I do have backup phones and and a backup of all my files in case something like this happened, I'm going to miss the curved edge and the S-Pen, and I don't want to take the phone to a 3rd party repair shop, considering you can buy an used functional Note Edge for less than the price of a replacement display, besides, the new Note 7 looks nice.
Anything that hasn't been mentioned above would be helpful... Thanks
UPDATE:
Now the screen doesn't turn on anymore, it flashes green when turned on, but remains dead. The T-Mobile sound still plays, and the motor rumbles for a second, but the fingerprint scanner and S-Pen rumbles and sounds are no longer responsive notification light pulses between white and blue.
Attempting to boot into download or recovery mode yields 2 seconds of green screen, then the T-Mobile boot up sound.
UPDATE 2:
Phone boots properly now judging by the fingerprint scanner responding and S-Pen sound, touch screen also seems to be functional based on S-pen cancel sound, but screen is now completely black, is it safe to assume a screen failure/damage?

Green Screen?

Hey,
I was replacing my screen, when I went to test it instead of the google logo I got a fully green screen, the phone booted, but continued to be green. The always on display looks exactly as it should. Once it was fully on, I managed to put my pin in blind and the phone all works fine (it seems), and some black gets through, I assume the screen turns off those pixels which is why maybe that shows up correctly(ish).
The interesting thing is, I did at one point have to working fully, full colour, this was between reconnecting the ribbon cable and restarting, but I pressed the power button to sleep it and then hit it again and if I remember correctly was green again. So that made me think "poor connection" of come kind. What's even more strange is that when it is green and I press the power button to sleep and wake, the screen appears at least to display the full colours at the end and begging of their animations respectively. Maybe its not full colour, but at least it's more visible.
The final thing is when I go into the bootloader, sometimes it's full colour, and others it's got the solid green effect where black isn't displayed. What's odd is, even when the bootloader is showing correctly as soon as start is click it goes to a full green screen again and we don't see the logo at all. Also I managed to get into safe mode and it made no difference. It's just odd that it seems to decide to green, rather than due to any cable tussle
Basically has to a cable issue, but I'm not sure how to troubleshoot it, and advice on how to proceed would be much appreciated. Like if the screen arrived faulty, if the connector is damaged in the phone so it can't be used, and the motherboard would need replacing.
Thanks,
Dillon
In recovery mode, there's full colour as well, I factory reset the phone, but it made no impact. However entering into recovery mode did flash the google logo and some of the screen whit, and the same thing happened on reboot from recovery mode.
It seems so odd to have these kind of consistent moments of colour and not colour if it's the ribbon
I should have also mentioned, that the clamp is broken, could that be the issue, does the connection need to be screwed in?
Also Here are some images of both the phones connection and the screens
I'd say jb weld your broken clamp before buying parts. Could be as simple as that it's not a tight enough connection

Can a screen become unplugged? Phone is functional but screen is unresponsive to anything

My husband's phone has been messed up for a week. It is fully functional, he can talk on the phone in the car. He has drained the battery completely. Force restarted. Everything possible, the screen is black.
I just hooked it up to my monitor via USB and I could see his the lock but that is all. The phone would not recognize his thumb print to unlock, and when he "slid his finger up" to try a pin it didn't work.
It seems completely unresponsive. He has never dropped his phone once. It has never gotten wet. The local place charges $300 to take the phone apart and replace the screen, but I am unsure if that would even work.
Any idea at all? Oh and next week is payment 24. The phone as is is not able to be traded in so we really need to fix this.
Thanks so much
It looks like the touch sensor has failed. With a locked screen that makes things more difficult.
If it were unlocked you could use any number of utilities to monitor your touches.
I hope that you have ADB enabled? If so you can try (in ADB shell):
Code:
$ input swipe 100 800 500 800
Also
Code:
$ input tap 300 400
Those are XY coordinates and you're going to have to play with them blind.
If you know the resolution of the screen you can work out where you want to swipe.
The upper left corner is 0, 0.
Good luck!
He doesn't have debugging on.
If it was the touch sensor, wouldn't the screen turn on when he hits the side button? It doesn't show anything on the screen ever now, even when you restart it.
He is only to make calls while on Bluetooth in the car
That's bizarre, I had the same thing happen last Monday, except I could still unlock my phone with the pattern lock, and fingerprint. but just a black screen. repair place said they couldn't find anything physically wrong with the screen. Replaced it and it works find now, but $380 for a replacement hurt a lot. I'm wondering if others have had this issue, and can we bring it to the attention of Samsung?

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