Question about LG 42Lv355B - 42"" Led-Backlit Lcd Tv

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Signal disappeared on antenna setting. no picture for 2 days. why? Works with BT box HDMI but not on antenna setting

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Aerial fallen off roof?

Posted on Dec 13, 2014

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Posted on Jan 02, 2017

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LG 60pk950 - HDMI inputs 'No Signal'


Try manipulating the TV mode selection to HDMI 1, 2, 3 or 4, whichever the number of HDMI ports are available.

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What do I do when the tv say no signal it just have a blue screen


First you'll need to make sure your TV is on the correct input. By the way, it's likely your TV is ok, unless the input you're using is defective. If you have an external antenna for over the air reception the TV must be on the antenna input and set to Air or Antenna, not cable. If you have basic cable the input must be set to cable. If you have a box for cable or satellite you can use antenna, composite, component or HDMI input. HDMI or component will give you the best picture. At this point just make sure the TV is set to the same input the box is connected to. If you still see the no signal then the Main board is bad.

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Are you connected to a cable or sat box, Are you connected thru antenna input on tv or a/v input. If connect to box thru antenna jack of tv do channel search to pick up ch 3 if box is set to that. If connected to outside antenna still do channel searsh but be sure tv is set to antenna. If connected via av or hdmi the cable or sat box is bad.

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The words "weak signal" flashes on screen at different places and do not receive a picture.


seems like you are using an "off the air antenna" that receives weak signal, you may be too far from the station, go get a roof top amplifier antenna or subscribe to digital service from cable, satellite or at&t uverse. If you think your antenna is getting good signal, try to rescan your tv for available channel. Make sure your TV set up is correct, if you are using Off the air signal, your setting should be set at "Antenna or off the air", then rescan your TV. Normally on Satellite or cable box, you just watch it on video channel or component input, if you are using HDMI then tune to HDMI channel.
Check your connection to make sure they are making good contact. If you can post your set up, I can better solve your problem.
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Onkyo service told me, the second timethat I called them, that there is a known HDMI handshake issue with Motorola and Atlanta Scientific cable boxes. The only solution, and it was a solution, is to connect the box through the HDMI 1 port ONLY. All the other (2,3,4) result in blinking/dropping of signal. I did this, changed the cable/satelilte setting to HDMI 1 and all is well.

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1 Answer

Completely lost the picture and sound. All that


You didn't mention from where your signal originates and that clue screen is common to many sets and means it is seeing no input signal.
The set would seem to be functional, otherwise you wouldn't be seeing the input selection menu.
While it is possible that the RF section/tuner (that handles the signal coming in) has failed, these are pretty solid.
If you have another set or can borrow one to connect to whatever source you have (antenna, cable, satellite) to see if a signal is, in fact, there.  As an alternative, you could connect your own signal source; VCR, DVD player, or, as it offers, HDMI or a PC and set it to whichever input you have supplied with signal. 

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