I wrote there now.
I tried many different ways.
Put the usb in, restart/deepstandby/complete shutdown from the wall.
When I run it on either using the button on the side or by remote control it goes from F1 {v43} to booting.
Previously I could see that it found the image and now it doesnt do anything ...it goes straight to booting.
I even tried to rename noforce to force and no success
May be, there is displayed "v43" instead info about founded image and then must be pressed "Down" button, as for flash bootloader ?
Or try diferent usb sticks ... may be, < 1GB ?
Edited by ims, 14 October 2018 - 08:41.