Sound issue Lcd Samsung 27" CURVED LED монитор серии 5 C27F591FDI

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Not Optimum Mode

 is displayed.

This message appears when 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 (



The images on the screen look distorted.

Check the cable connection to the product.

The screen is not clear. The screen is blurry.






Remove any accessories (video extension cable, etc.) and try again.

Set the resolution and frequency to the recommended level.

The screen appears unstable and shaky. There are shadows or ghost images left on the screen.

Check that the resolution and frequency for the PC are within the range of resolution and frequency compatible 
with the product. Next, if required, change the settings, referring to Standard Signal Mode Table (


) in this manual 

and the 


 menu on the product.

The screen is too bright. The screen is too dark.






Screen colour is inconsistent.

Change the 



The colours on the screen have a shadow and are distorted.

Change the 



White does not really look white.

Change the 



There is no image on the screen and the power LED blinks every 0.5 to 1 second.

The product is operating in power-saving mode.

Press any key on the keyboard or move the mouse to return to normal operating mode.

Text is blurry.

If using a Windows OS (e.g. Windows 7, Windows 8, Windows 8.1 or Windows 10): Go to Control Panel   Fonts   
Adjust ClearType text and change Turn on ClearType.

Video playback is choppy.

Playback of high-definition large video files can be choppy. This may be because the video player is not optimized 
for the computer resource. 

Try playing the file on another video player.

Sound issue

There is no sound.

Check the connection of the audio cable or adjust the volume.

Check the volume.

The volume is too low.

Adjust the volume.

If the volume is still low after turning it up to the maximum level, adjust the volume on your PC sound card or 
software Programme.

Video is available but there is no sound.

Sound cannot be heard if a HDMI-DVI cable is used to connect the input device.

Connect the device using an HDMI cable or a DP cable.

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.