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Faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
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Mention symptoms such as power-on led; any blinking led; etc
Have you checked the HDMI port setting on the TV.
There is a high possibility the cable HDMI box wire that was connected is different port on the TV.
Verify the TV with other sources.
Hi does the TV have any standby light etc, if so power off at the wall and leave for 1 minute the power back on and watch the standby LED it may or may not blink try to power on if the light blinks this may be a fault code and you can search this up with the model number.
If the inverter that supplies power to LED back-lights, the screen will be dark, and sound will be OK. Check it. If
you wish to get more details, check this site linked below. Pull up older posts
there. Check the site with patience, as
it has over 2350 posts now. All are
related to electronic equipment repair help.
If you search the site in Timeslide option, which can be selected from
the drop down list at the top left of the display window, it will be easy to
locate the related post. You can also
do a search by type in the brand name to your device into its search box at the top right of display
window.http://electronicshelponline.blogspot.com/
Unplug the power cord for one minute, then plug the cord back in . This allows the unit to reset itself.
Check the breaker box to make sure that the switch that controls the TV is not switched to "Off." If it is, flip the switch back to the "On" position.
Check the batteries in the remote control if attempting to turn on the TV from the remote. Make sure that the batteries are properly aligned. Try replacing the batteries.
Grab your Emerson TV's remote and hit the "Input" button at the top multiple times. This will cycle through the available video inputs for the Emerson TV.
You may have had the wrong input selected accidentally, such as the one for the DVD player. This will reselect the correct video input for you to enjoy television programming via your cable or satellite receiver.
If, however, your Emerson TV still lacks audio or video, peruse your A/V cable prong-to-port connections and ensure they are correctly made. The A/V cable has one red, one yellow and one white prong on each of its ends, for a total of two of each color.
Appropriately, there are red, white and yellow prongs on the back of your Emerson TV and the back of your cable or satellite box. Make sure the ports and prongs are matched up by color and have not been switched up.
Be sure the power cord is plugged in to the a/c outlet fully. Take a table lamp and plug in the same outlet to verify power is good. If no power, check for circuit breaker tripped in main breaker box.
If problem seems to stay with tv, I would contact seller. You should have at least nine months of warranty left.
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