Samsung Television UNES7550 User Manual

For antenna or cable connections, check 
the signal information. A low signal 
level may cause sound distortion.
Perform the Sound Test feature. 
(Support → Self Diagnosis 
→ Sound 
Test ) 

Antenna (Air / Cable) Connection (Troubleshooting)
The TV is not receiving all channels.
Make sure the coaxial cable is 
connected securely.
Run  Auto Program to add available 
channels to the channel list. Go to 
Channel  → Auto Program then select 
Cable and make sure to select the 
correct Cable TV signal type. There are 
3 options, STD, HRC and  IRC. Most 
cable systems use STD. 

Verify the antenna is positioned 
correctly.
No caption on digital channels. Check the Caption Setup menu. Try 
changing  Caption Mode Service1 to 
CC1 .
Some channels may not have caption 
data.
The picture is distorted: macro block error, 
small block, dots, pixelization. The compression of video contents may  

cause picture distortion, especially with 
fast moving pictures such as sports and 
action movies.
A weak signal can cause picture 
distortion. This is not a TV problem. 

PC Connection (Troubleshooting)
A Mode Not Supported message appears.Set your PC’s output resolution so it 
matches a resolution supported by the 
T V.
The video is OK but there is no audio. If you are using an HDMI connection, 
check the audio output setting on your 
PC. 

Network Connection (Troubleshooting)
The wireless network connection failed.Make sure the TV is connected to a 
wireless IP sharer (router).
Software Update over the network fails. Run  Network Status in  Network menu 
to confirm the connection.
If you have latest Software (SW) 
version, SW upgrade will not proceed. 

Others (Troubleshooting)
Purple/green rolling horizontal bars and 
buzzing noise from the TV speakers with a 
Component cable connection.Remove the left and right audio 
connections from the Set-Top box. If 
the buzzing stops, this indicates that 
the Set-Top box has a grounding issue. 
Replace the Component video cables 
with an HDMI connection.
The picture won’t display in full screen. 

HD channels will have black bars 
on either side of the screen when 
displaying up scaled SD (4:3) contents.
Black bars will appear on the top and 
bottom of the screen when you watch 
movies that have aspect ratios different 
from your TV.
Adjust the picture size options on your 
external device or the TV to full screen.
A Mode Not Supported message appears. Check the supported resolution of the  

TV, and adjust the external device’s 
output resolution accordingly. Refer to 
the resolution settings on User manual.
Caption on TV menu is grayed out. You cannot select the Caption menu if 
you have selected a source connected 
to the TV via HDMI or Component.
The external device’s Caption function 
must also be activated.
There is a plastic smell from the TV. This smell is normal and will dissipate  

over time.
The TV Signal Information is unavailable in 
the Self Diagnosis menu. This function is only available for 
digital channels the TV receives from 
an Antenna / RF /Coax connection.
The TV is tilted to the side. Remove the base stand from the TV 
and reassemble it.
The channel menu is grayed out 
(unavailable).