@TurboTom,
Thank you for your advice.... I saved the files before hacking, so i could perhaps restore them, but it is not sure the ssa will work again, so i don't want to void warranty by opening the unit.
I think i should ask my seller if they can service the unit, but they probably will see it was hacked... and they'll probably update the firmware.
So, I am still hesitating.
5 august 2017 : Finally, after thousands of tries, my ssa3021X went alive, again. I don't know what happened. When it finally booted, i was powering while pressing the system key... Not sure that it booted because of that.
Now, i made the 8.01 then 8.03 upgrades and it works like a charm.
All options remains actives.