Here the same problem.

I've got 2 Arnova 8 G2 tablets but they do not enter the Recovery Mode with the indicated buttons combination (Reset+Power)...

What is wrong?

Thanks for the help

Thanks globula!

At the end I was able to get the table entering in recovery mode. The strange fact was that the original firmware didn't give information about the recovery state: nothing was shown on the display to indicate the recovery mode so it was quite impossible to undersand if the procedure did start correctly...

Right.

Globula, after flashing the new firmware on both of my 8 G2 tablets, I realised (maybe because the new firmware exploits the whole set of system capabilities) that one of them has hardware problems: the device hangs while using it with moderate resources consuming apps (mail, google play, etc.) as well as on idle.

The other tablet works flawlessly so I don't think it's matter of firmware issue with the 8 G2...

I want to revert the firmware to the original version in order to ship the tablet to the manufacturer but the Rockchip Flashing tool v1.5 can't see it anymore while in flashing mode.

Do you have any suggestion about what the problem could be?