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

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Sony KV-20FS120 Model KV-20FS120 no sound at all, occasional a crackling noise but nothing else.

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  • irma32307 Jul 24, 2008

    Got audio through stereo. Thank you meknow

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Do you get sound when you play a dvd thru audio/video inputs?
If this unit has audio output at the back run audio to amp and see if you have audio thru your stereo

Posted on Jul 24, 2008

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Model Sony KV-G21q2S Problem-STR 6707 has been changed. After an hour the went down. The fuse and STR 6707 are working. But no picture no sound. When plug in it gives "boo" sound for few...


This is the SMPS Power suply drive and the IC fails ONLY if there is fault in the circuit. You need to check on the SMPS section
check this link below for tips:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Next you need to check if the LINE output transformer has failed. If so this will have a higher current drain and so switch off the SMPS unit. check for the EHT drivers, capacitors in the HT circuit.

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Undoutably the SMPSU (Switched Mode Power Supply) is faulty.. This will be a shop job... ensure you get a firm "Quote" and explanation B4 allowing it to be fixed.

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i have sony kv 14 gmr1mk r2ks always shorted and the other 1 appear like a lightning in midle of screen.. kv 21gmr1mk when adjust the brigth and contras it shut down the picture and blinking..can u help me how to troubleshoot this problem? what remedy you sudgest..thank you...

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It's normal for new sets, especially Sonys to do that due to some sort of gas build-up in the new tube. My set still gets a high-pitched buzz after power on and lasts for a minute or two before silencing. If the hissing continues when the TV is turned off return it to the shop ASAP. It could be a problem with the power supply, something getting ready to blow up. Good luck

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