1. USB (host) memory stick download mode : press and hold power( ) button on the front panel, and press upper direction arrow( ) button at the same time on cold off mode. It displays USB UPGRADE�, and then run automatically.
Or
In case of CubeRevo-mini : press power( ) button and hold until USB UPGRADE appears on the front display.

Note : usb_noboot.img, usb_kernel_root.img or usb_db.img should be renamed to usb_update.img for new software update, and copy the renamed file to USB memory stick.
And it should be run "remove hardware safely(memory stick)" function before extract memory stick from USB socket on PC panel. You can see the icon ( ) on the right bottom (left of the clock) of the PC monitor

2. Shutdown by force : power button( ) + OK( ).
3. TV resolution adjustment : press and hold power( ) button on the front panel, and press menu( ) button at the same time on cold off mode
4. Serial upgrade mode : press and hold power( ) button on the front panel, and press right direction arrow( ) button at the same time on cold off mode
5. HDD format by force : press and hold power( ) button on the front panel, and press downward direction arrow( ) button at the same time on cold off mode.
6. Network upgrade for factory : press and hold power( ) button on the front panel, and press left direction arrow( ) button at the same time on cold off mode, it is for bulk downloading method in Factory side, not for users

7. USB(client) download mode with Flash tool on the PC for CubeRevo only
: press power( ) button and hold until USB UPGRADE appears on the front display.