in case of OK button or LCD not work firmware can be flashed automatically by script.
- put 2 files firmware.bin and autoexec.ash on SD card root
- Press Power On on DVR
- Wait for about 1 minute
autoexec.ash
rm a:\autoexec.ash firmfl prog d:\firmware.bin >> d:\flashlog.txt rm d:\autoexec.ash rm d:\firmware.bin