Not possible for A10, because there are no full packages available. For the A8 you'll need to install the full package for 1.3.30 (can be found here) first and upgrade from there to your desired version. How this can be done has been discussed on these forums multiple times.
Could you pls suggest the methods how to downlgrade 1.3.30.? I have download the firmwware 1.3.30, but how to install?
So folks what’s on the horizen for the A-10? Is anyone working on a way to unbrick the machine or is this just it?