Samsung NC241T, NC190-T, NC191 user manual Not Optimum Mode is displayed, Source device issue

10 Troubleshooting Guide

Screen issue
Not Optimum Mode is displayed.	This message appears if the signal from the
	graphics card exceeds the maximum resolution or
	frequency for the product.
	Change the maximum resolution and frequency to
	suit the product performance, referring to
	Standard Signal Mode Table (page 101).
The images on the screen look distorted.	Check the cable connection to the product (Refer
	to "3.2 Connecting and Using a PC")
The screen is not clear. The screen is blurry.	Adjust Coarse(page 75) and Fine(page 76).
	Remove any accessories (video extension cable,
	etc.) and try again.
	Set the resolution and frequency to the
	recommended level. (Refer to "11.1 General")
The screen appears unstable and shaky.	Check that the resolution and frequency for the
	PC are within the range of resolution and
There are shadows or ghost images left on the
	frequency compatible with the product. Next, if
screen.
	required, change the settings, referring to
	Standard Signal Mode Table (page 101) in this
	manual and the INFORMATION menu on the
	product.
The screen is too bright. The screen is too dark.	Adjust Brightness(page 71) and Contrast(page
	72).
Screen color is inconsistent.	Change the COLOR settings. (Refer to "
	Configuring Tint")
The colors on the screen have a shadow and are	Change the COLOR settings.
distorted.	(Refer to " Configuring Tint")
White does not really look white.	Change the COLOR settings.
	(Refer to " Configuring Tint")
There is no image on the screen and the power	The product is operating in power-saving mode.
LED blinks every 0.5 to 1 second.
	Press any key on the keyboard or move the
	mouse to return to normal operating mode.
Source device issue
A beeping sound is heard when my PC is booting.	If a beeping sound is heard when your PC is
	booting, have your PC serviced.

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