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“Untrusted device” message pops up on my smartphone when I tried to cast YouTube to my projector. How can I fix it?

12-01-2023

If the projector model you have is BenQ GV1, GS2, or TK810, please follow the steps to fix the issue.

STEP 1

Connect the projector to the internet and follow the user manual to update the projector firmware to the latest firmware version

STEP 2

Click “App Store” on the home screen 

STEP 3

Select and install “CCast”

If the projector model you have is BenQ E600/E800 series, please follow the steps to fix the issue

STEP 1

Connect the projector to the internet and follow the user manual to update the projector firmware to the latest firmware version

STEP 2

Go to “All Apps” on the home screen, and select “BenQ Suggest”

STEP 3

Go to “Education” and select and install “Google Cast Patch”

Applicable Models

GV1, GS2, TK810

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