Originally Posted by kiwijunglist
Error related to the bootloader not being unlocked, i have gotten a bit further now.
I now can run TWRP recovery, so I'm doing a full backup to internal storage.
I guess after that I should copy that onto my PC.
What is the next step after that, is it safe to now start flashing roms.
If I flash a 4.3 or 4.4 rom, can I go back to 4.2?
Glad you solved the problem.
Making a TWRP backup is good but I suggest making a Flatline - NVFlash backup to be sure you have a way back if you brick your tablet. It is time consuming but well worth the effort. Here is a link to that procedure - http://forum.xda-developers.com/show....php?t=2455922
Several considerations before you flash a custom ROM. Be sure you have the correct bootloader and recovery version for the ROM you are flashing. As far as returning to 4.2 after moving to 4.4 I believe there are a couple of ways but haven't done that myself.
All of the threads with custom ROM's have very clear prerequisites and steps to follow for each particular scenario. Also, there are hundreds of posts in the Q&A and Development forums with excellent advice and cautions. DO YOUR RESEARCH! I know from experience that rushing into it can be a disaster and without having a thorough understanding of the steps involved and the potential pitfalls, you will wind up with a bricked device. I bricked a smart phone about a year ago just because I didn't take the time to do the research. It's a hard lesson to learn that way so take the time to research, research, research, especially if you are going to try different versions and different ROM's. In the end it will be time well spent.
Good luck my friend!