ZTE Grand X In weird screen bugs - Android Q&A, Help & Troubleshooting

Hello, I'm new to this forum, and to Android too.
So my problem is this, i have ZTE Grand X In and i have problem with my screen. I have 2 years warranty for the phone and i already gave phone to the service in T-Mobile. They replaced the LCD screen, they gave my mobile back,but the problem is still there. Sometimes my screen is black but the screen is reacting to touches not a problem, but the screen is black, it is turned on but it's black, and sometimes it turns on, but some glitchy lines, white and colorful lines is showing on screen. I don't know if it's graphic card or motherboard or something. I already tried recovery mode {power,volume up,} {power, volume down} {power,volume up,home button} {power,volume down,home button} and it doesn't work after all. I really don't know what to do.
If you could help me i would be happy.

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anyone?
rrraka said:
anyone?
Click to expand...
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Did you ever get this resolved?
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Hello XDA.
The screen on my LG G3 Verizon (vs985) has been acting weird and I really would like a second opinion about if I have a screen issue on my hands or if it is a motherboard problem. I included pictures below.
Screen responds to double-tap-to-wake, and buttons still work. I'm able to turn phone off by pressing power button (as long as it normally takes to display Power Menu), then tapping on where the Switch Off button ought to have been displayed. Apparently, motherboard sends stuff to screen, but screen unable to visibly display it.
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Pictures (L-R): When booting (picture taken with flash), when booting (picture taken without flash), after booting into Android, phone charging with screen switched off.
SOLUTION: It turned out to be a screen problem (screen was replaced and voila!).

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