LinkPI C524_4SDI BLOCK after Firmware update

Hello, I have a demoboard LinkPi C524_4SDI 2233180003, purchased from you. I have updated the firmware according to your instructions


I put the files on the Fat32 stick and inserted it into the USB port,

turned on,

the UPDATING logo on the display,

after a while the LinkPi logo and then it gets stuck on this .

How can I restore correct operation?