Firstly, my TF201 is unlocked with the Asus unlocking tool and cannot be reversed, I understand. (Decided not to go ahead with a custom ROM)
I managed to update to JB by downloading to a micro SD card and the update went flawlessly.
However with the latest update, it just doesn't happen. I cols-boot and choose RCK. Screen goes to the Andoid and after about 10secs he falls over with an exclamation mark.
After a further 1min device reverts to normal boot.
I tried wiping all data but with same result.
Can anyone help as I am at a lost. Otherwise I will just have to stick with the original version of JB and re-install all my apps again.