My Nexus 7 2013 is no longer working properly: I cannot get the screen to come on, and I don't see any evidence of back-lighting even in a dark room. I believe the device starts up and shuts down properly because when it's connected to my computer via USB, I can browse the files on the tablet.
On two occasions, I was able to see the boot screen ("Google" logo with an open padlock at the bottom of the screen). The 2nd time it happened, there was an unusual white horizontal line (typically the background is solid black) crossing the screen. That was two days ago; nothing since.
I suspect it's a hardware issue, but I don't know how to test. So I have two questions:
- What can I try to fix the problem? I'm open to using ADB, fastboot etc, but need detailed instructions (am noob).
- If the problem can't be fixed, how can I safely clear all my info from the device before I dispose of it?
The Nexus is on Android 5.1.1, and is rooted with an unlocked bootloader. The device is also fully charged.
When I plug the device to my TV's HDMI, the Nexus outputs the Android UI to the television, and the tablet screen can sense my touch (I can navigate the touchscreen, although nothing is displayed on the tablet itself). So if any diagnostic or fix requires me to see what's on screen, it's doable