Question about Sony FD Trinitron WEGA KV-20FS120 20" TV

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Cycling on its own

Hi - my Trinitron which I've had for about 8 years is cycling through Video 1, 2, 3 and my set Channel 3 on its own... It will not stay on Channel 3 which is hooked in with my cable. The buttons on the TV itself don't seem to respond at all either. Do I need a new TV??

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  • WatertownP Apr 30, 2008

    Any idea how much this would cost??

  • WatertownP May 01, 2008

    The update is that after unplugging the TV and leaving it alone for 24 hours... I turned it on and it now works. Buttons on the TV work now too, though I suspect this will occur more and more and we will soon be repairing... or shopping... thanks for your help.

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  • 71 Answers

Chassis has to be removed and tv/video switch has to be replaced; push button switch.

Posted on Apr 29, 2008

  • james cunnington Apr 30, 2008

    you would have to check with your local repair shops; should be repaired within 1/2 hour of servicing

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1 Answer

Why does a Sony Trinitron when on Video 3 works fine with dish. When on channel 3, color goes to b & w, then snaps back to color. on a regular cycle ?


your converter box has a channel generator for the channel #3 and you tv has a tuner set to ch#3 that and a coax wire . every part of that system has to be working correctly to send video ,color,sound if even one part of the system is a little off you run in to problems . most likely your problem is with the converter box channel generator . contrast that to when you get the signal from your video input . with that simple system you just take video from the video board in the box and send it directly into the video board in the tv .....a lot less to go wrong .

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How to change the channel my Sony Trinitron TV turns on to?


hit menu button on your remote, navigate to channel setup menu. on the sub-menu, set channel fix to your channel that you require. now when your tv powers up this will be the default channel. if this doesn't fix your issue then try cycling through video inputs tv/video button on your remote.

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Cant tune my Sony TV to channel 3


Go into the setting menu on the tv and go to channel setup,then select add channel.



please rate this solution

Feb 01, 2009 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Manual donwload


Video input source is changed by the buttons:
1. Video Source
2. Input
3. TV/Video
4. Source

one of those four on the remote some where.

Also, chances are your TV itself will have one of those buttons somewhere.
Usually pressing it will either cycle through the inputs or bring up a selection of them, which is usually navigated by either arrow buttons on your remote or the channel up and down keys.
Lemme know how it goes.

Dec 12, 2008 | Sony FD Trinitron WEGA KV-32FS100 32" TV

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Sony FD Trinitron WEGA TV Model Number KD27FS170 volume problem


I had the same problem with the volume in digital mode and found the answer here: http://www.justanswer.com/questions/1m0ln-sony-fd-trinitron-wega-tv

The actual solution is towards the bottom of the post and hard to read through, so I simplified the instructions below:

On your remote control (with tv off)
1. press Display, channel 5, Volume Up and then Power
this brings up the service mode (you will see some green text on your screen)
2. Press channel 2 to scroll through options until you see "Micro" in the upper left of your screen
(channel 2 cycles up through the options, channel 5 cycles down)
3. Press channel 1 to scroll through suboptions until you see "DIOF" appear under "Micro"
(channel 1 cycles up through the suboptions, channel 4 cycles down)
4. Press channel six until the default value (12:60) changes to 12:40
(channel 3 increases the value, channel 6 decreases the value)
5. Once the value has been changed to 12:40, press Muting and you should see red text in the upper right hand corner that says "Write"
6. Simply turn the power off and back on for the change to take effect. Your volume problems should now be fixed.

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2 Answers

Bright green 3 in the upper right corner of my TV


press the display button on your remote.hope this could help you.u

Aug 19, 2008 | Sony FD Trinitron WEGA KV-20FS120 20" TV

1 Answer

TV will not turn off and TV buttons preform the wrong functions


check D1004 5v zener diode, if defective it can cause you this type of problem, also check D1003 and D1005.
part # 8-719-929-15 from sony.
these diodes are located in HS board, the one where all your front button are located in. by the way the HS board is no longer availableffrom sony

Dec 18, 2007 | Sony FD Trinitron WEGA KV-27FS100 27" TV

1 Answer

Trinitron --upper right channel/ video 1 will not go away


hi there, i'm sorry but you need a remote for that problem, ty

Nov 16, 2007 | Sony FD Trinitron WEGA KV-27FS100 27" TV

1 Answer

No picture but sound works.....


  • adjust brightness setting when playing tv.
  • adjust screen control located on flyback transformer.
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1 Answer

Continually rolls thru inputs


Make sure the remote cannot be "seen" by the set in question. My guess is the buttons on the remote are transmitting without anyone pressing them....accordianman

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