The device is no longer rooted, so no shell r/w access. (maybe as my UK stock with serial device, is now a US stock with no serial device, which is causing a signature fail during install of the latest ota?). I also downloaded the ota manually via the xda forums nabi 2 wiki page and tried to install from the sd card but that fails too. The last ota I need to install downloads via the update service, but fails with errors upon install. Here is where I am now The device boots and is usable, I can install apk files and use the tablet normally, however I cannot update. Several weeks of reading and falling at every turn. There were three ota's, during the instal of the third one, the device crashed - a ton of text sprawled up the screen the device shut down-restarted and booted into recovery. This put the device back to US stock, with no root privileges or serial number. I lost my original backup so I used the generic stock backup that comes with nabilab2. I modded a stock UK Nabi 2 with nabilab2 from the xda forums, I needed to do an ota update from Nabi and needed the device to be returned to stock.

I think I have the answer, but need to run this by someone who probably knows! I've spent the last three weeks reading up on my issue with no progress at all. (I also damaged the LCD while trying to pry the touchscreen out which I found out later.) I had to replace by purchasing the case/Touchscreen/Case for ~$30 and moving the components from the broken Nabi to the good touchscreen Nabi and that was much easier.Total noob here, sorry. In the case you are better than me and able to remove the glass, I would recommend removing the LCD screen completely which is attached to the metal plate containing most of the components. I suppose a good glue solvent may have helped there, but I was lazy to purchase one. However, the Touchscreen at least on my NV08B that I tried to remove was glued down inherent much tougher and a heat gun wouldn’t loosen the glue around the sides of the LCD making it pretty much irreplaceable. The NV08B, The Touchscreen is separate from the LCD screen. In the old IN08A Dreamtab, you could remove the touch screen with a heat gun and patient, but the LCD was attached to the Top glass via a soldered cable requiring both the Touchscreen and LCD to be bought together.

Nabi dreamtab manual