Help Unlocking Tablet

[Lana30]

Hi ,
A friend of mine has a Samsung Galaxy Tablet,. The system seems to function, turns on off, menu and return light come on and off, sounds work, no screen, no user interface the screen only “glows” dark gray. I don’t think she would ever set it in debugging mode. I have tried to help her by using button combinations and unplugging battery. She wants to get her pictures off. Ii is accessible with adb. For example, adb devices returns serial number? unauthorized. I cannot figure out what unauthorized means. I really don’t know the adb command set. I try adb shell input text pw, adb shell input keyevent 66 and it returns error: device unauthorized. This adbd’s $ADB_VENDOR_KEYS is not set;…I tried deleting the key file in my user directory. Any advice on the $ADB_VENDOR_KEYS and after that any commands to copy files on an unknown file structure on the tablet to a PC. KAy suggestions? Thanks in advance.

 

[Lordvincent 90]

Does the device have a custom recovery? You may be able to use adb without authorization that way (though it may be hard to tell if you are in recovery without a working screen)

Maybe @scary alien might have an idea about this...

 

[scary alien]

Well, my first thought about "device unauthorized" with regard to adb is that the device you're trying to connect to/with has not been authorized from the pop-up dialog that you get when you first connect via adb (the "Allow USB debugging?" RSA fingerprint pop-up -- we discussed this in one of your other adb thread, Lana).

If you don't or can't authorize the device from this pop-up--which would certainly be difficult (impossible) to do with a non-working touchscreen, then I'm afraid @Lordvincent 90 's suggestion about using adb with your device when it's in custom recovery (where it won't / shouldn't ask for authentication) is probably your only recourse.

The only gotcha with regard to that would be if you had to disable MTP from the custom recovery screens in order to get adb to work (I know I have to on my N5--don't know about the Samsung Galaxy Tablet, though).

edit: I don't believe the stuff about the ADB_VENDOR_KEYS is necessarily relevant if you haven't and/or can't authorize/authenticate the connecting device. I'm guessing this is the page where you read about deleting the adbkey file?

http://stackoverflow.com/questions/32132434/set-adb-vendor-keys​