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Q.

RGB high tones (Especially green) are lost when HDMI connection used on the CG3145 / CG319X.

 

A.

The issue happens when input signal(HDMI) does not have colorimetry information.

In this case, monitors can not convert the input signal correctly, and as a result, RGB high tones (Especially green) are lost.

 

Here is how to check  if HDMI signal has "colorimetry information" or not:

1. Press any of the front buttons (except power button), the operation guide appears on the screen.

2. Select   to displays the Setting menu.

3. Select "Signal".

4. Please refer to a screenshot of the Setting menu below.

When input signal does not have colorimetry information, signal Information of OSD shows “SMPTE170M/BT.709”.

 

 

 

If input signal does not have colorimetry information and having this issue, please try following countermeaure:

1. Use a DisplayPort connection instead

2. Try changing the signal/resolution of an signal source device for the monitor to get colorimetry information

3. Please update the firmware (Permanent fix)

Please refer to the link

 CG3145 for Win

 CG3145 for Mac

 CG319X for Win

 CG319X for Mac

 

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