I have followed these instructions for a minimal install
https://wiki.mobileread.com/wiki/PRST...ing_and_Tweaks
The reader just re-boots with the original firmware intact when holding down menu & home. The LED flashes amber.
I tried connecting it to the Sony reader desktop software on a Mac, It identified that there was newer official firmware available from Sony but the install of that failed as well.
The reader works fine I just can't flash it with either official or rooted firmware. On v 1.0.03.11140 currently.
Any ideas?