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Samsung UD46C User Manual

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Check the followings.
Installation issue (PC mode)
The screen keeps switching on and off.
Check the cable connection between the product and PC, and ensure the connection is 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 blank spaces found on the screen have nothing to do with the product.
Blank spaces on the screen are caused by the PC or graphics card. To resolve the problem, adjust the 
screen size in the HDMI or DVI settings for the graphics card.
If the graphics card settings menu does not have an option to adjust the screen size, update the 
graphics card driver to the latest version.
(Please contact the graphics card or computer manufacturer for further details about how to adjust 
the screen settings.)
PC
 is shown in 
Source
 when a PC is not connected.
PC
 is always shown in 
Source
 irrespective of whether or not a PC is connected.
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 (refer to "Connecting to 
a PC").
Check that the product is connected correctly with a cable
Check that the device connected to the product is powered on.
Not Optimum Mode
 is displayed.
This message is displayed when a signal from the graphics card exceeds the product's maximum 
resolution and frequency.
Refer to the Standard Signal Mode Table and set the maximum resolution and frequency according to 
the product specifications.
The images on the screen look distorted.
Check the cable connection to the product