Onyx C65ML has two types: the 5 and 8 LEDs.
We must be careful that the software fits.
For versions with 5 LEDs (from ArtaTech), operating software version 1.5 (August this year) is available on the forum (in polish - google translate can help):
http://forum.eksiazki.org/onyx-boox-...ml-t14722.html
There is also a detailed procedure for flashing - find out what could be wrong.