Dynex DX-42E250A12 - Manual (Page 33)

Troubleshooting
29
DX-42E250A12
Troubleshooting
Video and audio
Warning
Do not try to repair your TV yourself. Contact
authorized service personnel.
Problem Solution
Picture does not fill
the screen. There are
black bars around
the picture. • Change the aspect ratio. An increasing
amount of digital TV and movies are
presented in wide screen (16:9). See
“Adjusting the TV picture” on page 17.
No picture (screen is
not lit) and no
sound. • Press on the TV or the remote control.
• Make sure that the video cables are
connected securely to the back of your TV.
• Adjust the contrast and brightness. See
“Adjusting the TV picture” on page 17.
• Make sure that the power cord is plugged
in.
• Make sure that the correct video input
source is selected. See “Selecting the video
input source” on page 16.
• Try another channel. The station may be
experiencing problems.
• Make sure that the incoming signal is
compatible.
• Make sure the antenna or cable TV is
connected correctly and securely. See
“Connecting a cable or satellite box” on
page 8 or “Connecting an antenna or cable
TV (no box)” on page 10.
• Check the closed caption settings. Some
TEXT modes can block the screen.
Dark, poor, or no
picture (screen is lit),
but sound is good. • Try another channel. The station may be
experiencing problems.
• Make sure that the antenna or cable TV is
connected correctly and securely. See
“Connecting a cable or satellite box” on
page 8 or “Connecting an antenna or cable
TV (no box)” on page 10.
• Adjust the brightness. See “Adjusting the TV
picture” on page 17.
• Make sure that the correct picture mode is
selected. See “Adjusting the TV picture” on
page 17.
• If you are using an antenna, the digital
channel signal may be low.
• If you are using an antenna and the signal
strength is low, adjust the antenna or use a
highly directional outdoor antenna or
set-top antenna with a built-in amplifier.
• Make sure that the video cables are
connected securely to the back of your TV.
• The video cable(s) you are using may be
bad. Try a new set.
No color, dark
picture, or color is
not correct. • Try another channel. The station may be
experiencing problems.
• Adjust the color saturation. See “Adjusting
the TV picture” on page 17.
• Make sure that the video cables are
connected correctly and securely to the
back of your TV.
• Make sure that the antenna or cable TV is
connected correctly and securely. See
“Connecting a cable or satellite box” on
page 8 or “Connecting an antenna or cable
TV (no box)” on page 10.
• If you are using an antenna, the digital
channel signal may be low.
• If you are using an antenna and the signal
strength is low, adjust the antenna or use a
highly directional outdoor antenna or
set-top antenna with a built-in amplifier.
Only snow (noise)
appears on the
screen. • Try another channel. The station may be
experiencing problems.
• Make sure that the antenna or cable TV is
connected correctly and securely. See
“Connecting a cable or satellite box” on
page 8 or “Connecting an antenna or cable
TV (no box)” on page 10.
• If you are using an antenna, the digital
channel signal may be low.
• If you are using an antenna and the signal
strength is low, adjust the antenna or use a
highly directional outdoor antenna or
set-top antenna with a built-in amplifier.
Dotted lines or
stripes appear on
the screen. • Make sure that the antenna or cable TV is
connected correctly and securely. See
“Connecting a cable or satellite box” on
page 8 or “Connecting an antenna or cable
TV (no box)” on page 10.
• If you are using an antenna, the digital
channel signal may be low.
• If you are using an antenna and the signal
strength is low, adjust the antenna or use a
highly directional outdoor antenna or
set-top antenna with a built-in amplifier.
• Make sure that the video cables are
connected securely to the back of your TV.
• The video cable(s) you are using may be
bad. Try a new set.
• Other devices (for example, surround sound
receiver, external speakers, fans, or hair
dryers) may be interfering with your TV. Try
turning off one device at a time to
determine which device is causing
interference. After you have determined
which device is causing interference, move
it further from the TV to eliminate the
interference.
Double images. • Use a highly directional outdoor antenna,
cable TV, or satellite TV.
The picture has a
few bright or dark
spots. • A few bright or dark spots on an LCD screen
is normal. It does not affect the operation of
this TV.
Good picture, but no
sound. • Increase the volume.
• Make sure that the sound is not muted.
• Unplug the headphones.
• Make sure that the correct audio mode is
selected.
• Make sure that the audio cables are
connected correctly and securely to the
back of your TV.
• Make sure that the antenna or cable TV is
connected correctly and securely. See
“Connecting a cable or satellite box” on
page 8 or “Connecting an antenna or cable
TV (no box)” on page 10.
• If you are using an antenna, the digital
channel signal may be low.
• The audio cable(s) you are using may be
bad. Try a new set.
Picture quality is
good on some
channels and poor
on others. Sound is
good. • The problem may be caused by a poor or
weak signal from the broadcaster or cable
TV provider.
• If you connect to cable or satellite TV
without a set-top box and experience poor
picture quality, you may need to install a
set-top box to improve signal reception and
picture quality. Contact your cable or
satellite TV provider about upgrading to a
set-top box.
Problem Solution
DX-42E250A12_11-0618_MAN.book Page 29 Wednesday, August 31, 2011 8:31 AM