Oops. Bricked it. won't turn on or do anything.

Luckily, I sort of knew what I was doing. Back up and running now. Android 4.2.2
Won't let me update to 4.3 ??
@OC. 'Rooting' is like getting a mobile phone unlocked to work on any network. You get access to the system files.
I didn't like the battery, wifi, clock, date, icons etc, top right of the screen.
I was used to them being bottom right. So I 'flashed' a modification to the tablet. Cos it's rooted

It wasn't compatible, even though the website said it was

It killed my Nexus(Bricked it).
All's fine now again

Anyone need a hand with a Nexus 7, I'm getting there
