Yaber U5 - TROUBLESHOOTING; 1.Why is the display of the projector available but without audio?; 2.Why is the audio of the projector available but without display?; 3.Why does the projection screen show no signal?

Computer only Duplicate
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Computer only: is the default option — only displays on the main monitor.
Duplicate: makes all of the monitors display the same thing duplicating the
desktop on each monitor.
Extend: makes all of your monitors act like one big monitor extending the
desktop across all of them
Projector only: Displays only on the secondary monitor like a projector.
(7)You can change your screen resolution:
Choose Start—Control Panel—Appearance and Personalization—Adjust
Screen Resolution
Projector anly
(Note: VGA connection can only transmit analog signal of video not audio.
An external speaker is required when the device is connected via VGA
cable.)
2. Connecting to the DVD Player
Use the AV cable in the package.
1: Turn on your DVD player and the projector;
2: Connect the colorful female connectors to your DVD player's RCA cable;
3: Connect the black connector to the Audio-in port of the projector;
4: Connect the yellow connector of another side to the video port of the
projector;
5: Press the Source button on the projector or the S button on the remote to
select the correct AV source.
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