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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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?


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1 Answer

My four year old was messing witht he bottons on the front of my Apex AT2702 television set, and not all it shows is a blue screen with a key symbol in the bottom left hand corner.


Hi
There are 7 buttons with its front panel including power ON/OFF switch button.They are; From left to right:- Video, Menu, Volume(-ve), Volume(+ve), Channel(-ve) and Channel(+ve). If these buttons are not there, it will be difficult to operate this set without a remote control. If you haven't the remote contro with you now, buy one universal remote control. The universal remote control suited for this set is COMCAST ON DEMAND CUSTOM-3 UNIVERSAL REMOTE control. The setup codes are:-
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2 Answers

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

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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.

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1 Answer

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You need a special 1/8" cord for video output. For example the standard 1/8" cord has 2 black rings on the 1/8 plug, each ring is a channel one for left side and one for right side. You need an 1/8 cable that has 3 rings on the plug, 1 for video, 2 for Left and right audio channels. It dosen't have to be an IPOD brand cable it just needs the 3 black rings.

Good Luck

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1 Answer

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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

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1 Answer

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

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1 Answer

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