Samsung LN46C750 User Manual page 57

Issues
Sound Problem
There is no sound or the sound is too
low at maximum volume.
The picture is good but there is no
sound.
The speakers are making an
inappropriate noise.
No Picture, No Video
The TV will not turn on.
The TV turns off automatically.
There is no picture/video.
RF(Cable/Antenna) Connection
The TV is not receiving all channels.
No Caption on digital channels.
The picture is distorted: macroblock,
error, small block, dots, pixelization.
PC Connection
A "Mode Not Supported" message
appears.
"PC" is always shown on the source list,
even if a PC is not connected.
The video is OK but there is no audio.
Network Connection
The wireless network connection failed.
Software Upgrade over the network
fails.
Solutions and Explanations
First of all, please perform the Sound Test to confirm that your TV audio is properly operating.
• go to MENU - Support - Self Diagnosis - Sound Test (P. 26)
If the audio is OK, the sound problem may caused by the source or signal.
• Please check the volume the of device (Cable/Sat Box, DVD, Blu-ray etc) connected to your TV.
• Set the Speaker Select option to TV speaker in the Sound menu. (P. 21)
• If you are using an external device, check the device's audio output option (ex. you may need to
change your cable box's audio option to HDMI when you have a HDMI connected to your TV).
• If you are using a DVI to HDMI cable, a separate audio cable is required.
• Reboot the connected device by reconnecting the device's power cable.
• Check the cable connections. Make sure a video cable is not connected to an audio input.
• For Antenna or Cable connections, check the signal information. Low signal level may cause
sound distortion.
• Perform the Sound Test as explained above.
• Make sure the AC power cord is securely plugged in to the wall outlet and the TV.
• Make sure the wall outlet is working.
• Try pressing the POWER button on the TV to make sure the problem is not the remote.
If the TV turns on, refer to 'Remote control does not work' below.
• Ensure the Sleep Timer is set to Off in the Setup menu. (P. 22)
• If your PC is connected to the TV, check your PC power settings.
• Make sure the AC power cord is plugged in securely to the wall outlet and the TV.
• When watching TV from an antenna or cable connection, the TV will turn off after 10 - 15 minutes
if there is no signal.
• Check cable connections. (remove and reconnect all cables connected to the TV and external
devices).
• Set your external device's (Cable/Sat Box, DVD, Blu-ray etc) video outputs to match the
connections to the TV input. For example, if an external device's output is HDMI, it should be
connected to an HDMI input on the TV.
• Make sure your connected devices are powered on.
• Be sure to select the TV's correct source by pressing the
• Reboot the connected device by reconnecting the device's power cable.
• Make sure the coaxial cable is connected securely.
• Please try Auto Program to add available channels to the channel list.
go to MENU - Channel - Auto Program then select Auto and make sure correct Cable TV signal
type is set in the menu. There are 3 options. (STD, HRC and IRC) (P. 13)
• Verify the Antenna is positioned correctly.
• Check Caption Setup menu. Try changing
• Some channels may not have caption data.
• Compression of video contents may cause picture distortion. especially on fast moving pictures
such as sports and action movies.
• A low signal can cause picture distortion. This is not a TV problem.
• Set your PC's output resolution so they match the resolutions supported by the TV.
• This is normal; "PC" is always shown on the source list, regardless of whether a PC is connected.
• If you are using a HDMI connection, check the audio output setting on your PC.
• Samsung Wireless USB dongle is required to use a wireless network.
• Make sure the Network Connection is set to
• Make sure the TV is connected to a wireless IP sharer (Router).
• Try network test in Setup menu. (P. 28, 30, 31, 32)
• If you have latest SW version, SW upgrade will not proceed.
SOURCE button on the remote control.
Caption Mode Service 1 to CC1. (P. 24)
Wireless. (P. 29)
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