GCE Vectrex HP-3000 Owner's Manual page 9

Troubleshooting Checklist
No Picture and No Sound
• P™eT'sw"Kh OT^ol'olfi " OFRTurnTttrON.°UtlCt'
• Check that the wall switch which controls outlet is
No Sound; Picture OK
No Picture; Sound OK
• Brightness control on back of console turned down. Turn
Built-In Game Plays OK but Cartridge
Game Erratic, Stops Unexpectedly, or
Extraneous Graphics Appear
• Cartridge not inserted completely. Push cartridge into slot
all the way to mark on plastic housing; push Reset Button
and resume play.
Joystick or Action Buttons Do
Not Work or Are Erratic
• Control panel plug is loose at console outlet. Push plug all
• Built-in control panel plugged into outlet for second con¬
trol panel. Always plug built-in control panel into the