Can't update to Android 4.1.2 or 4.2

I got in over my head, and thanks to this.. I'm all set. it did change the build number to JOP40C (not sure if that's ok), but I'm now running 4.2 and everything seems ok
 
Hi,
I've got exactly the same problem with the same tablet.
My English is not very good, so may you please explain how you eventually fixed your Nexus 7, please?
Have you changed the build-number by yourself?
Matthias

I got in over my head, and thanks to this.. I'm all set. it did change the build number to JOP40C (not sure if that's ok), but I'm now running 4.2 and everything seems ok
 
I have the same problem too. TS it would be great if you could share in detail how you solved this problem.
 
Search for something called the Google nexus toolkit. That should solve your issues.

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