We don't do too well here with Australian made machines!
If there's no video, check the connector on the back of the LCD screen, or any connectors/cables on the LCD.
Check the battery voltage on the MPU. I have no clue what type it should be but they can open it and just look by popping the battery out to see what voltage it should be. If it measures low, replace it and try the machine.
It could be a problem with the video portion of the MPU or a video card. Is there any manufacture name on the machine, such as Sirius?
I really can't help a whole lot more. Perhaps another NLG member will reply with more help.