So I must use one of these workarounds to use it:
- Power on, press reset button and then re-power on
- Power on holding Home button and then after few secs press Menu button.
This reset and reboot the tablet and LCD magically turn on
- Boot without LCD, login (vibrator tell you if your finger is on correct position) and then ask a power off.
At next power on (if done a few seconds after power off) LCD will turn on
Now I have issues with seller for tablet replacing and with this problem I can't also resell it
If exists a linux command or program that can be used by script to turn off and then turn on LCD screen, probably I can try to alter boot process to include it as internal workaround.