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1997 sony trinitron tv display/power malfunction?

Kv20vm30 sony trinitron- when plugged in, first makes a small chirp. will not turn on until waiting for 5 minutes or so for it to make a high pitched squealing sound. when turned on, the audio is good, but the display only shows a bright white line in the center of the screen. help?

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  • Expert
  • 76 Answers

More expensive to fix than replace. Throw it out. If you're interested it's probably a bad capacitor.

Posted on Mar 27, 2014

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Posted on Jan 02, 2017

jomaru
  • 337 Answers

SOURCE: No picture only a high pitch sound

Yes,it can be repaired,sometimes for no reason components fail and they need to be replaced,if you are familiar with tv service you can check the horizontal output transistor,it might have gone bad(shorted out)and is all is going to take to get the set back running,sometimes the output trasformer damages the transistor and both have to be replaced,first just change the transistor and if it blows up again then replace the transformer,if you are not too familiar with servicing a tv be safe and call for assistance from a servicer,if you take the set to them it should be expensive.Let Us know how it goes or if you need more information.

Posted on Nov 08, 2006

  • 192 Answers

SOURCE: high pitch sound for Sony FD Trinitron WEGA KV-27HS420 27" TV

The high pitch squeal you hear is usually caused by a coil vibrating, normally in the horizontal circuit. I've also seen the ferrite bead on the horizontal output transistor do this, but, it is rare. I normally will repair this by finding the coil and "tightening" it. To tighten a coil, technicians use different chemicals, such as, a hot glue gun, rubber silicone or even finger nail polish. I will find the coil that screams by starting with the usual suspects and using a wooden dowel, barely touch the coil and if the pitch of the noise changes, then, thats the coil that needs repaired. If you do not know your way around the inside of a television, I never recommend you do so, since, this procedure must be done with the set turned on and you poke your hands around the inside of the set by the high voltage circuit. Hope this helps your decision.

Posted on Mar 04, 2007

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

SOURCE: TV screen wont turn on but just a loud noise coming from the tv

i have a panasonic ct32sc13g flat screen tv 2003 model wont come on no lights will come on

Posted on Dec 20, 2007

salt56
  • 373 Answers

SOURCE: TV does not turn on. When plugged into an outlet makes a high pitch noise.

Your problem is a shorted horizontal output transistor C5148 located behind the highvoltage transformer on a heat sink with a clip over it and you can't see the number unless you remove the clip Has to be unsolded and solder in new. Also the highvoltage transformer must be replaced This is the big part with the large red wire coming out and going to the top of the picture tube. Must be unsoldered and replaced with original RCA .....do not get a replacement It has several connections plus three wires to connect to it and I recommend using desoldering brad can get at Radio Shack 5 foot roll. Well as you can see it gets pretty involved. You can't get the parts from most distributors unless you have a business. If he tackles it and has a distributor the parts would run about $50 to $60 and a repairman average should be less than $200 and more than $150 hope this helps. Contact me for any questions you may have. I am more than willing to help.

Posted on Dec 30, 2007

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