Key to boot to command line

I have problem with my setup as predesk boot shows the normat text infos but when the desktop should open then i get only black.

So how i can prevend that desktop is started (go to command line) or started with default values?
I found an info about what keys should work but the one I need doesn’t work (press numberblock *)
I tried also SHIFT “8” = *.

RISC OS keypress option for Boot
Hold down key on startup

R reset all OS CMOS
Delete reset all CMOS
T as R but configure the opposite video Sync
Copy as Delete but configure the opposite video Sync
Keypad 0-9 change configured monitor type to specified number
Keypad . change mode, sync and monitor type to Auto
Shift reverse the operation of automated boot
Keypad * force start up to a command line

Try holding down the SHIFT key when booting. Keep holding down the key until the startup progress messages appear.

If that doesn’t work: Are you seeing a startup message of the form “Keyboard not present: autobooting”? That can indicate you’ve got too many USB devices connected: unplug everything else (including hubs) and try again with only the keyboard connected.

Thirdly, it may be the keyboard itself. Some keyboards treat a key being held down at power-on as a “stuck key” so won’t signal it is being pressed: you may find that a different keyboard will work.

Mash ESC?

Thanks!
SHIFT works to get into Command line but you must press not too early as when press too early the computer doesn’t start at all…
The info about “Keyboard not present: autobooting” is also helpfull as I saw that error also sometimes.

Mash ESC?

That worked for me when the computer didn’t react on SHIFT or ‘*’ (wireless keyboard).

Seems for the RK3399 ROM another behaviour was implemented.
Key “ESC” works only when you press multiple times during booting and the result is that it doesn’t start !Boot which solved my problem as the monitor obey file had wrong setting which resulted in a black screen.