What if your vava projector has not sound after the HDMI port is swithed. Some users first swithed to hdmi 2 from hdmi 1 then back to hdmi 1, then there is not sound from hdmi 1. What should we do? Follow the steps below to troubleshoot the issue.
- Please try performing a factory reset by going to Settings> General> Factory Reset.
- Once the projector is reset, please make sure that the projector has the latest firmware.
- This can be done by going to Settings>General>Update version. Please update the projector if it is not up to date.

Related post:
How to Connect Speaker to VAVA 4K Laser Projector?
VAVA 4K UST Laser Projector Quick Setup Guide
Do I Need a Screen to Go with VAVA 4K Projector?
WEMAX Nova vs Optoma CinemaX P2 vs VAVA 4K – Which Projector is Better?