[Nexus 7 (2013) Q&A] GlibberGlamps:
ETA: I don't see a way to delete this topic so I'm just updating it. I didn't want to risk waiting another day to not have an answer since I'd already posted other places over the weekend with no response and we need it working for tomorrow morning, so I just went ahead and flashed the factory image from here:

https://developers.google.com/android/images

Everything is in order now! Tips for anyone else doing this, don't skip the step of adding the platform tools to the path environment variables. I did the first time and the flash script wasn't able to find some files because of it and aborted. Everything pushed to the tablet and installed fine after I added the tools folder to system variables.

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This is the only place where I see detailed answers so I registered to ask this.

Status locked/not rooted, just however I bought it when it released plus whatever OTA updates before I stopped using it. Dead in a drawer for maybe two years, I got it powering on again by disconnecting/reconnecting the battery then charging on my PC overnight via USB, but it kept booting to a black screen, no logo, no splash.

I went into recovery mode and did the wipe data/factory reset. I can now get to the welcome setup screen but there are two problems:

1) Errors immediately pop up blocking the screen, making it hard to choose anything because as soon as I hit ok to make an error go away, another pops up. It bounces between "android.process.acore/gapps/media has stopped" with "calendar has stopped/email has stopped" sometimes appearing too but it's mainly the first ones.

2) If I'm fast enough after dismissing an error, I can click next from the language screen to the wifi connection screen. SKIP is greyed out. I can select my wifi but when the password prompt comes up, no keyboard appears after clicking the field to enter one. It's just the blinking cursor.

Keep in mind the errors are still popping up too so I don't know if they're blocking things. I sometimes used a bluetooth keyboard with it, so I grabbed that and tried typing with it just in case and no luck.

Attempts​

I found a fix to try sideloading a factory image via the apply update via adb option in recovery mode, but the google site said it's safer to try sideloading a whole image OTA, so I tried that instead using the zip file there for Nexus 7 2013 wifi (I have 1st Gen but don't see that anywhere so this may be the issue too). After it hit 100% it was aborted for some reason I can't remember now.

But I do remember when I looked up whatever it said, most responses were that sideloading a whole image OTA won't work on devices that haven't been "unlocked" or something.

I found another response to someone with my problem, not having a keyboard after resetting, which said to sideload a keyboard app through adb. I found some gboard apk listed as the version for the Nexus 7 but when I did the adb thing, it aborted because of something to do with e-signature not being verified.

Question​

I can figure out trying to copy over a factory image but since I suspect the main issue now is the Nexus not having wifi access to complete setup then update/install what it needs to stop those errors, I consider that a last resort. So my question for now is for further help on getting a keyboard app or another way so I can type. If I still can't get things working after that, then I'll ask about the factory image.

Thanks!