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Image Problems
Problem: No image appears on the screen.
1.
Check whether the source (PC, Flash Drive, DVD Player, Set-top Box, etc.…) is
properly configured.
2.
Turn off all of the equipment and power up the equipment again in the correct order.
Problem: The image is blurred.
1.
Adjust the focus directly via the focus dial on the projector.
2.
Ensure that the distance between the Qumi and the screen is within specified range.
3.
Clean Qumi lens with optical lens cleaning cloth if it is dirty.
Problem: The image is wider at the top or bottom (trapezoid effect).
1.
Position Qumi so that it is as perpendicular to the screen as possible.
2.
Adjust the Keystone settings in the Settings menu to correct the problem by either
turning Auto Keystone on or by manually adjusting the keystone setting (Settings >
Image > Keystone).
Problem: The image is reversed.
1.
Check the image orientation of the Projector in the Settings menu (Settings >
Image > Projection).
Screencasting Problems
Problem: Unable to find Vivitek in my device’s casting list.
1.
Ensure that both devices are in the same network and successfully connected
2.
Restart AirReceiver on the projector several times (Check AirReceiver >
Restart/Close > RESTART).
3.
Change the device’s discovery setting and check again (Check AirReceiver >
Advanced Setting > Device Discovery Tweeks > Turn Off / On)
Problem: Casting is successful but the display screen is black.
1.
Go to AirReceiver > Advanced Settings > Use Hardware (HW) Codec, turn off this
feature and check again.
Problem: Unable to find the casting function in your Android
smartphone/tablet.
1.
The casting function might be located in the device’s Setting > Wireless and network
section.
2.
If you are still unable to find your device’s casting function, visit Google Play to
download and install a casting application (Example: Google Home). After
successfully installing and launching Google Home, select Account from the Menu
bar > and choose Mirror device to start casting.
