APP Error: “check the input source”

March 27, 2023

The MARS systems use the general 5g WiFi network, and the WiFi network created does not have a network connection.

When connected to WiFi without a network connection, it will automatically switch to data cellular or another WiFi for some Phones. So you will get the ” Check the Input Source” Error from HollyView App.


  • Confirm the OLED screen of the MARS 400S PRO has the Video Format Display.
  • Allow the Location for the HollyView App under iPhone settings.
  • Make Sure the “Connect” Button on the HollyView App is Yellow.
  • Turn off the cellular data on the Phone Settings.

Use the cellular data at the same time when using HollyView APP: