Question about Hitachi 43F300 43" Rear Projection Television

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Demagnatize Our tv had a speaker on it and has a green lines through it. Is there a way to fix it.

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Turn it on and off it should clear it self other wise you have to call some one thats got a degaussing coil.

Posted on Dec 05, 2007

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Posted on Jan 02, 2017

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1 Answer

5 year old panasonic viera LCD works great until tonight, screen turned into vertical and horizontal rainbows, can see vague picture behind all the lines like looking through thin black horizontal venetian...


make sure your speaker to your sheron sound isnt to close to it .also if dvd player is the source then move away from tv will demagnatize the tv theres a magnet in them

Jul 05, 2011 | Panasonic Viera TH-42PZ80U Plasma TV

1 Answer

TV click on and off.When it come on it has a green screen with lines. Stay on just for about 3 sec. than click off.


The green crt is dawning to much current, and that is why the TV is shutting down, if you remove the speaker cover, there is a focus block, that has six controls, on it three are for red blue, and green screen voltages, if you turn green down where the retrace lines go away, the TV should stay on, it is not worth fixing, you would be better off getting a new LCD.

Feb 11, 2011 | Mitsubishi VS-60707 60" Rear Projection...

2 Answers

After losing electricity while the tv was on, the picture now has a circle in the middle which is fine but the outer areas are discolored..mostly green. Everything else works fine..just the bad coloring on...


You can't do that without a demagnatizing coil (degausse coil). Try leaving the set unplugged for 2-3hrs and try again.
see explanation below:


Magnetized The set is probably magnetized and needs degaussing (demagnetizing). All CRT type TV's have an internal demagnetizing circuit that is engaged when the set is first turned on after being off for the day.
If this circuit is working then you sometimes hear a "bonk" sound (about 1/2 a second long when the set is first turned on. If this circuit isn't working the set will become magnetized over time and will have to be degaussed using a degauss coil available at a TV repair shop (cost aprox. $35.00) and you should have the circuit checked at the same time. A set will also become magnetized if a large speaker (magnet) or motor is close to the TV. Be sure to vote/rate me if this helped Thanks!

Oct 31, 2009 | Sylvania 6720FDG 20" TV/VCR/DVD

1 Answer

Toshiba 32A33 television screen is part green.


It sounds like it has magnitized sometimes you can unplug it and it will demagnatize when you turn it back on, otherwise you need a demagnitizing coil .

Aug 11, 2009 | Toshiba 32A33 32" TV

1 Answer

Screen series of coloured circles


The degusser is out .
When you turn the set affter its
been off awhile it makes a thud sound
and demagnatizes the tube thats
the degusser working . cost to
fix verries on makes 40.00 80.00
on 27"

Jul 01, 2009 | Televison & Video

1 Answer

My TV is about 4 years old. There is a continuous


It just needs demagnatized. See if you can borrow a demagnatizer from a shop or see what they want to do it.

Jun 26, 2009 | Sanyo DS27510 27" TV

2 Answers

No sound from external speakers system


Look into your monitor settings and computer settings and see if you can reverse the "input" and "output". If both are set to line in or line out then they pretty much cancell themselves out.

May 23, 2009 | Televison & Video

1 Answer

Bad color


If it is a glass crt then you need to have the set demagnatized with a demagnatizing coil. All tv shops have one. This is worth fixing and usually at the price of a service call.

Mar 15, 2008 | Panasonic CT-32SX12 32" TV

1 Answer

TOSHIBA 21S3E


Your set needs demagnatizing if it hasn't been dropped. Only a tv repairman has a demgnatizing coil. However one try: unplug it and turn it back on because all standard tv's have an automatic demagnatizing coil circuit around the tube inside. but doesn't always demagnatize completely.

Jan 02, 2008 | Televison & Video

3 Answers

Tv knocked over


change the picture tube the screen has moved..sorry...good luck..

Jul 24, 2006 | RCA F36685 36" TV

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