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No Video Is Displayed on the HD Displays

Publication Date:  2019-07-14 Views:  527 Downloads:  0

Issue Description

The cable connection is correct, and there is video output to the HD displays. However, the HD displays indicate that there is no signal input.

Handling Process

Step 1 Use the HD displays' remote controls to set the signal input source to DVI IN.

Step 2 If no remote controls are available, run the debug command to set the signal input source to DVI IN.

     1. SSH to the telepresence host's port 23.

     2. Run devm tvcmd 0 QMS to check the left HD display's current signal input source.

        The desired response is ulRet=0 response:QMI:SL2. If the response is not ulRet=0 response:QMI:SL2, run devm tvcmd 0 IMS:SL2.

0 indicates the left HD display, 1 indicates the center HD display, and 2 indicates the right HD display.
In the command devm tvcmd 0 IMS:xxx, xxx can be SL1, SL2, SL3, or PC1.

Root Cause

The signal input source is incorrect.