Question about Sony FD Trinitron WEGA KV-27FS100 27" TV

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Sony CRT TV audio and video flickers after warm-up period

TV works immediately for 2-3 minutes then picture and sound together go in and out. Has worked perfectly since purchased new in 1991. No previous repairs.

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  • greenman3333 Mar 27, 2009

    Sony rinitron 27" picture is perfect then fades to snow and snaps back to perfect picture again. It just keeps repeating over and over. The sound cracks when it goes to snow then back to perfect when the picture is fine. I have a 32" trinitron with power problems as well. It seems these tv's are destin for problems at some point. I will never buy another one after this.

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4 Suggested Answers

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Posted on Jan 02, 2017

CompuGuy44
  • 432 Answers

SOURCE: Picture and sound go away after 2 minutes

Protection circuit fault kicks in. No vertical Deflection (V STOP),B+ over voltage protection (OVP), This is about a $150 -$200 to fix.

Posted on Jul 04, 2007

jerryg50
  • 1667 Answers

SOURCE: Sony triniton 28" crt tv i have got sound but no picture

Any set can be repaired it is the question of the cost and the availability of the parts.

The fuzzy lines with static noise is probably from an arcing in the high voltage multiplier or in the flyback windinngs. I am very sure that the flyback assembly with the high voltage multiplier, and most likely the horizontal output transistor will have to be changed just to start. It is also possible that there may be some failure in the power supply as well.

The set would have to be serviced by an experienced TV tech. As for the cost, it will be a bit expensive.

Jerry G.

Posted on Apr 20, 2008

jingjao
  • 252 Answers

SOURCE: No picture, sound works on Sony TV KV-27V22.

try to adjust the screen. it is located behind the CRT board.(CRT board is the board that attached to the picture tube) you will find a black knob which label screen adjust it by turning the knob.

Posted on Jul 04, 2009

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Resolders the FBT-(flyback tranformer).Resolders the video board connections sockets holes,that the board connected to the CRT-(tv tube).Plug in the tv,to have power to the tv,take out the tv video board,for exposer of the CRT-(tv tube).Take an electrical wire with a good insalation in it,grounded to the tv steel frame some where.Take the other end of the wire go toward the open high voltage CRT-(tv tube).U will hear a pop sound,than ur tv CRT-(tv tube) is a 100% clean out of contaminations or u will hear a deeing sounds only,mean the tv CRT-(tv tube) it is to old to pop anymore,just let tv deeing sounds going on for like about 20 mins to rejuvenated the old CRT-(tv tube).After this repluging the tv video board for a tv signal and readjust the button on the FBT-(flyback tranformer) that said focus to fix the CRT-(tv tube) focus problems.

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where the cable goes in in the back of the set,there is 2 modules on the main pc board and they are soldered in.
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Can you please check the model number, what is listed is not valid for a Sony. This could be a simple fix or something expensive. With the model number, I can provide you with details.
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1 Answer

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Picture tube ( CRT ) is defective = re-juvenation may help for
a temporary fix...................................T.

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Sorry to say, it sounds like a bad picture tube, But could be also the capacitor that filters the screen voltage on the crt drivers. In all my years though, your complaint has been the picture tube. Good Luck.

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