[Android Q&A, Help & Troubleshooting] tiggerrr9:
Hi, I bought a ZTE K92 (AT&T Primetime) tablet new and unlocked on eBay back in June 2018 for $149 and did not open it up or turn it on/set it up till just yesterday (10/6/18) because of a move to a new residence and I kinda forgot about it since I do have quite a few other devices and it was packed up in boxes I just never got to unpacking until recently. Anyways... I was hoping for a good experience since it had received good reviews and seemed like it was a fairly high speced tab, it is a nice device, unfortunately, at&t screwed it up with A LOT of they're bloatware apps, one named as "device help" continually reloads an icon on the home screen EVERY time I unlock the home screen! I've removed it a kajillion times and tried like hell to disable it but it's greyed out, tried to remove at&t associated files through my file mgr, but to no avail since I don't have root access. BUT... These are minor problems!...

MOST DISAPPOINTING/DEPRESSING is that I have *thin black/grey (depending on the background colors being displayed) lines on the entire screen/display, in normal (vertical) view mode the lines are *horizontal*, in landscape mode the lines are *vertical*, AND... they pulse on/off at a steady rate , as if it was related to the clock but at a slower rate, approximately on for 2 seconds, then off for 2 seconds continuously.

It has done this since first starting the tablet up new out of the box!

I have searched hell and high water to find the cause and or a fix, I've tried apps for screen issues, I've tried restarting, I've tried YouTube videos on how to fix, but nothing has worked and what's worse is i have not been able to find ANYTHING related to my exact problem, only problems with flickering or colored lines on they're screens!

The closest thing I found in relation to my exact problem was certain screens made for Lenovo tabs/laptops, but I don't think the ZTE K92 tablet has the same display as those devices?!?

I have not done a factory reset or a partition wipe as I don't think it will solve the problem.

I DO NOT really want to take the tablet apart to mess with the screen ribbon cables!

It's running 7.1 nougat stock, and I have dev options enabled/on, I've tried different settings under drawing and hardware acceleration settings but it had no effect.

I was wondering if there's a way I could get the tablet back to marshmallow O.S. for a fix, but again, I don't think that would solve the problem, I'm pretty sure it's a hardware/setting or calibration issue.

I did not find or attempt any firmware updates as I'm worried if I do and it doesn't solve the problem, I might not be able to undo the update, and I'm a firm believer in NOT updating, a don't fix what ain't broke kinda thing, yeah I'm old school.

In my opinion, I think it is a screen digitizer issue and I honestly don't know if there is a fix for this AND if I could find a *qualified* technician to fix it!?

This is really very annoying and sucks!

Is there not a single sole through XDA that knows about this type of problem AND MORE IMPORTANTLY, does anyone know how to fix it!?

P L E A S E ! ! ! This is such a shame for this tablet as it is a really nice device.