Secret Video Menu

Turn on machine, hit "menu"
At main menu level, directly enter "9999"
Enter Factory default code "1111" for PIN
The test menu will come up
Go to VDP test for video display test,
Use right arrow key to go thru all HDTV test patterns
Other menu, hit "Select" to test each functions
"Exit" to get out of that mode.

Warning: do not change PIN number if you don't intend to use it, because if you set PIN, it will no longer be default "1111" value, and next time if you forget PIN, the machine will be disabled, will need to select "factory default " from 9999 menu, which will restore PIN, but will erase all your customized settings.