Hi Bulek, I used two update.zip's on the microsd card. First I mistakenly tried the c67ml Carta version, as this didn't work I thought maybe I have the first one. I am not sure if the Artatech version is on this page or site:
http://www.onyx-international.com/in...5-rc1-20160512
I read somewhere in a Russian forum that the long 'Starting Up' period has to do with downloading something, conceivably I thought it interrupted this process to soon (5-10 minutes) so it corrupted the update process and I needed a more complete update file to reset this corruption. Just a theory, to wrap my head around what could be wrong.
Through facebook I found this Asian firmware and thought if might well work - not taken into account the risk that it might take me further from a solution.
http://www.hytexts.com/C67_firmware/C67ML/update.zip
My system now doesn't even get back in recovery mode. Perhaps the firmware is not ok even though it was accepted by the firmware loader, or perhaps it's because the wifi time out after a short time or the battery was low on power (it was not plugged in with around 70% battery left) and when I looked at it the next morning it was not responsive anymore. It does respond in some way, but the screen is either in 'no power' mode or in a this time static 'Starting Up' mode.
Both the spinning Starting Up animation and the recovery menu do not appear in whatever sequency I try to get them to appear. Next time I just stick with the OTA update or I just leave it at wat works. "If it ain't broke, why fix (update) it?" I ask myself in hindsight. In my case I wanted the backlight level default on 0.
I keep the forum posted.