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Check the followings.
Installation issue (PC mode)
The screen keeps switching on and off.
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.
Make sure that the power cord is connected.
No Signal is displayed on the screen.
Check that the device connected to the product is powered on.
Depending on the type of external device, the screen may not display properly. In this case,
connect it with the HDMI Hot Plug function turned On.
Not Optimum Mode is displayed.
maximum resolution and frequency.
according to the product specifications.
The images on the screen look distorted.
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