Check the followings.
Installation issue (PC mode)
The screen keeps switching on and off.
secure.
Blank spaces are found on all four sides of the screen when
an HDMI or HDMI-DVI cable is connected to the product
and PC.
the graphics card driver to the latest version.
Screen issue
The power LED is off. The screen will not switch on.
No Signal is displayed on the screen.
Not Optimum Mode is displayed.
maximum resolution and frequency.
according to the product specifications.
The images on the screen look distorted.
The screen is not clear. The screen is blurry.
Set the resolution and frequency to the recommended level.
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