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Wall furnace solnoid interfers with TV picture and sound

Whenever the solenoid operates, the plasma TV screen picture and sound has interference for a few seconds

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This is not an ac problem!

Posted on Aug 27, 2008

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Posted on Jan 02, 2017

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Tv has a pink/magenta shimmering when the tv screen has a light coloured backgroung


Shimmering can be caused by a number of things.

The first that springs to mind is electromagnetic interference. Speakers, amplifiers, florescent lights in close proximity can cause this. I even saw a TV that had been fixed to a wall adjoining the next door neighbours who had put his TV in exactly the same position and the interference passed through the wall.
Try moving the TV location away from all sources of interference (including Cable boxes, Video recorders, etc.) Does the problem change or go away?
Is the TV grounded properly? Interference needs to be siphoned off to a ground. if you put your hand around the cable that feeds the TV a video signal does the problem change or reduce?

Another issue may be some form of video post-processing going on causing the shimmering. Some forms of image smoothing software built into the TV can cause this. So try shutting down any features on the TV, does the problem go away?

On a big TV that is fed a low resolution video stream you will always see what the industry calls "artefacts". These are distortions caused by the transport compression of the video signal. there is no way around these except for receiving a better resolution picture stream.

Mar 13, 2015 | Panasonic TCP42C1 Plasma TV

1 Answer

The TV flickers off and on causing the screen to go black intermittently when our furnace runs. If we turn the furnace off, the picture straightens up and when we turn the furnace back on, the picture...


The TV could be wired to same breaker on the furnace. Or the cable line maybe cut or rubbing on electric line for furnace which can cause interference. Check each wire make sure there isn't any bare wire showing. good luck

Mar 29, 2010 | LG RU-23LG10P 23 in. TV/DVD Combo

2 Answers

VW42L HDTV I have picture and sound but the picture is shaky and is flickering.It was fine this morning


Your TV is probably getting interference from electrical appliances that produce electromagnetic interference. These includes fluorescent lights and electric motors such as water pumps. Cars, motorcycles and other things the emits electromagnetic signal can interfere with your TV.
Check for any new electrical installations within 5 meter radius or any newly connected appliance on the branch circuit where your TV is plugged. Disable if there's any then operate the TV. If your TV is not mounted on the wall, try moving it to another location to check if this is the cause of the problem.

Sep 03, 2009 | Vizio VW42LF 42 in. LCD HDTV

1 Answer

Panasonic Viera 46" plasma~no sound, no picture


I would use the warranty at Bestbuy at that point. Opening up the TV would most likely void the warranty.

Jun 28, 2009 | Panasonic TH-42PD50U 42 in. Plasma EDTV

1 Answer

Ghosting of picture from a Panasonic home cinema system


There must be a fault in the screening of the internal wiring to the scart outlet in the home theatre system. I simply changed the way the player was connected to the TV and the interference disappeared:-

1.) I used the RCA video outlet instead of the scart lead. Picture quality was not compromised. FYI the Panasonic Plasma TV I have has only RGB video input sockets at the back, so I used a scart to RCA adaptor to overcome this problem of connecting old technology to new.

2.) The surround sound when playing DVDs is generated directly from the home theatre system so there was no need to connect the audio from the home theatre system to the TV

3.) I used a pair of RCA leads to connect the "audio out" from the TV to the "audio in"on the home theatre system to provide the option of TV sound through the home theatre system.

Mar 18, 2009 | Panasonic Televison & Video

1 Answer

HDTV interfers with my Police scanner


It sounds like HD mode on the TV operates at a different frequency (refresh rate) that then causes interference to your nearby police scanner. There's not much you can do about this--the HDTV design cannot be modified.

Your best solution is to try moving the police scanner further away from the TV. I doubt there is any kind of barrier that you can place around the scanner that might block the interference (the "noise" given off by the TV is likely omnidirectional).

Dec 23, 2008 | Sony BRAVIA KDL-40S2000 40 in. LCD HDTV

2 Answers

Xantech IR repeater


Which receiver do you have?

If you have a 29110, it may be that you have a florescent light or natural sunlight interfering. This may also attributed to an LCD or Plasma TV.

If you have a 29180 it may be plasma or sunlight interference.

If either one of the above is true you may want to consider the 29195.

This may also be true with the two receivers connected together.

Hope this helps.

Mar 02, 2008 | Televison & Video

1 Answer

My "42" inch sansui plasma monitor


You don't have any magnet anywhere near the TV do you ?
If not it sounds like something magnetic is interferring with the picture.

If not get the warranty out :D

Dec 16, 2007 | Sansui HDPDP4200 42 in. HD-Ready Plasma...

2 Answers

Bose lifestyle 25 system and Panasonic Plasma Tv not working together


I posted the message as Tet Tet before. I can now tell you that I have resolved the problem. The issue is with the Panasonic 50Inch TV. Some people reported the same problem but only when the TV was up on the wall. It turns out that the problem lies with the metal discs which screw on at the back of the TV to enable you to hand the TV on the wall bracket. In my case I had excessive interference caused at the back of the TV (could be the fan). When I put the TV on the wall bracket the metal discs would be in contact with the wall bracket which in turn was acting as an antenna causing the iterference to the bose remote which operates at a frequency of 27.45MHz. You can solve the issue by adding some insulating tape around all the metal discs avoiding them to make contact with the wall bracket. If that fails Panasonic will swap your TV for another one like they did with me. I can now enjoy my Bose System with the 50 inch Panasonic TV. It took me three months but managed to get a solution. I hope this helps. For further info you can mail me at rizzocarlo@hotmail.com. These discs should be made of metal because they are perforating the metal screen at the back of the TV. Panasonic please change this design.

Dec 06, 2007 | Televison & Video

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