Question about Sanyo DS31520 31" TV

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Sanyo DS31520- high pitched whine, picture is fine

32" tv, about 4 years old. Picture is great, but there is an annoying high pitched whine, that seems to be involving the area where the video imputs ect go. If you move them around or bang the TV, it sometimes stops for a while. Any suggestions as to what is causing it, and could it be repaired by a handy person? Thanks!

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  • 143 Answers

Sounds like bad solder connections on ground of the inputs radioshack has a cheep solred gun and solder make sure set is unpluged

Posted on Nov 02, 2007

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Posted on Jan 02, 2017

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Google your model number; I suspect it is a bad color wheel--lots of these sets have a fan like noise or even a grinding sound sometimes called a high pitched whine.

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Apr 18, 2009 | Sanyo DS31520 31" TV

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Sanyo tv making high pitch noise from loose cable connector


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two audio out RCA type lacks a red and white. only thing I can think of is make sure nothing is connected to the outputs unless your running it to a stereo. now for the inputs are 3, video yellow ,left and right audio is white and red, make sure the yellow has yellow input rca plug. still problems take them all loose and see it feed back goes away.

Dec 22, 2006 | Sanyo DS31520 31" TV

1 Answer

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.

Nov 08, 2006 | Sanyo DS31520 31" TV

2 Answers

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If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages. Squealing noise is from the power supply teling you that there is an overload condiction. The overload is shifting the operational frequency of the power supply into upper audio hearing range. Check the diodes and caps in the supply circuit and the active components in the deflection circuit. also resolder the LOPT, h-output, h-driver, and h-driver transformer. Good luck

Jun 19, 2006 | Sanyo DS31520 31" TV

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