another hudl2 not working.......

[Guest mike 3hudl2 vernon]

hi i have triplet boys aged 6 who each  have a hudl2. one of them (the hudls) is goosed.

i have tried the factory reset and it wont boot up, it initially stopped whilst it was getting app certificates . now it doesnt even get that far & screen starts getting tiny white rectangles wizzing about on it and the hudl shuts down

i cleared the cache.

in the recovery menu , which I can occassionally  get to , it has options to do with external storage and adb (whatever that is)

not sure if its on lollipop, kitkat or ?

so the questions I think I'm asking for help with is how should I proceed?

how do i identify what version of android its on?

how do i recover it using external storage or adb?

any help would be appreciated and feel free provide as much idiot's guidance as possible!

Cheers  & thanks in  advance.

Edited March 31, 2016 by mike 3hudl2 vernon
Add recovery image

[Guest mike 3hudl2 vernon]

Or if anyones aware of a more helpful androif site;-)