Dynex DX-42E250A12 Troubleshooting, Video and audio, Warning, Problem, Problem, Solution, Solution

Troubleshooting DX-42E250A12 29

Troubleshooting

Warning

Do not try to repair your TV yourself. Contact authorized service personnel.

Video and audio

Problem	Solution
Picture does not fill	• Change the aspect ratio. An increasing
the screen. There are	amount of digital TV and movies are
black bars around	presented in wide screen (16:9). See
the picture.	“Adjusting the TV picture” on page 17.
No picture (screen is	• Press	on the TV or the remote control.
not lit) and no	• Make sure that the video cables are
sound.	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	• Try another channel. The station may be
picture (screen is lit),	experiencing problems.
but sound is good.	• 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	• Try another channel. The station may be
picture, or color is	experiencing problems.
not correct.	• 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.

Problem	Solution
Only snow (noise)	• Try another channel. The station may be
appears on the	experiencing problems.
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.
Dotted lines or	• Make sure that the antenna or cable TV is
stripes appear on	connected correctly and securely. See
the screen.	“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	• A few bright or dark spots on an LCD screen
few bright or dark	is normal. It does not affect the operation of
spots.	this TV.
Good picture, but no	• Increase the volume.
sound.	• 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	• The problem may be caused by a poor or
good on some	weak signal from the broadcaster or cable
channels and poor	TV provider.
on others. Sound is	• If you connect to cable or satellite TV
good.	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.