How do I get my Nexux 7 out of Bootloader Mode?

[Dave Green3]

My Nexux 7 is stuck in Bootloader Mode

I updated my Nexus 7 from Kitkat to Lolipop, which was useless, so I tried to reload Kitkat. I'm not sure what I have done, but my tablet is now stuck in Bootloader mode.
In "Recovery mode" or "Start mode" pressing the start button brings up a small message "Booting failed".
PLEASE HELP!

 

[Williap112]

Did you have any luck with this as I have the same problem?