I had a device that was rooted on stock rom and recovery. What happened was that an OTA was installed and it went to the "boot verify certification" screen. I had to install Ubuntu to get TWRP running again.
I'm able to boot into TWRP, and I tried installing different ROMs, using adb sideload, from Stock ROM, ParanoidAndroid, and Madri-ROM.
The first one was able to install, but when I reboot the phone, I get stuck on the LG logo. I wait for an hour and it still does not do anything.
So now I try the other two custom ROMs, and I get an error saying "E:Error executing updater binary in zip "... .zip".
Then it reads "Error flashing zip '... zip'.
My question is: What else can I do to get this phone working again? I would like stock ROM, and preferably stock recovery back (Recovery is secondary).
Thanks in advance,
Note: When I use adb sideload, the .zip file that gets transferred becomes a file called 'sideload.zip'. Is that correct? If not, what do I need to do to fix it?