Keep the test switch depressed and switch the machine on.
Keep the test button depressed until the screen will read, i'm not sure of the actual wording but "RTC initialized. press test button to set manually".
Release the test button and press again to go into test mode.
The settings that requires adjusting will be highlighted
Do not adjust the date and time, just accept and exit.
Do the scope and gun calibration.
After this is done game menu will appear at the bottom of the test menu list.
Go into game menu and the game should be OK.