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New Member

CTS 1300

we have an error with our CTS 1300.

it show Display Diagnostics: Error into our status details and i want to resolve this.

is there someone here who have this issue recently?


Original Codec version is 1.6.7(4212) downgraded from 1.8.0(55)P1 after registering CM.

From GUI system status show:

Video cable: OK Power cable: Standby; Display Diagnostics: Error



Cisco Employee

CTS 1300

Hi Thomas,

What you describe usually means that the HDMI cable is connected to the wrong HDMI port on the display.

HDMI cable needs to be plugged into the primary HDMI port with the white display icon (further from the center) instead of the aux port with the orange display icon. Can you have this verified?

Best regards.

New Member

CTS 1300

We've verified the connection.  The GEN4 display is connecting to the primary HDMI port with the white display icon.

Cisco Employee

CTS 1300

Thanks Thomas.

If I am right on the following assumptions:

  • You have verified the aforemetioned connection on the display side (not only the codec side).
  • Display works ok during calls.
  • Display does NOT cycle through different states or appears solid blue while in the IDLE state;

Then, could you provide the output of command "show upgrade detail" while in display is active i.e. while in a call?

Best regards.

New Member

CTS 1300

Thanks Antigles.

   Your assumptions are correct. We'll get this output later tomorrow!

Cisco Employee

CTS 1300

Hi Thomas:

In CTS 1.6.X code, we cannot read the serial number of the GEN4 displays, which may be why you're receiving the error.  In CTS 1.7.1 and higher we are able to read the serial number of the GEN4's.  Did you see the same error when the unit was at 1.8.0, prior to downgrading to 1.6.7?

On the WebGUI, do you see the display serial number listed (Display_Serial, should be in the same area as the Display_Hardware model/Display version you posted a screenshot of earlier)? 

In addition to Antonio's suggested output of "show upgrade detail,"  you should see the serial number listed in the output of "show hardware video."

Thanks -


New Member

Re: CTS 1300

Thanks Tihopper.

   Only have captured screen after downloaded to 1.6.7 code. Please see attached zip file.

Message was edited by: CISCO MODERATOR