The sound volume of the small display has been adjusted to the lowest level
- Adjust the sound volume of the small display to an audible level
There may be a headphone connecting to the headphone jack of the small display
- Disconnect the headphone from the headphone jack of the small display
There is no Video out jack( Yellow ) to the small display. NO SYNC will appear on the small display
- Connect the Video out jack to the small display correspondingly