Distorted sound initially with Samsung LN-R 408 LCD TV

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Samsung Television

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Dana Kaplan @dbk

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投稿日: 2019年6月18日

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Distorted sound initially with Samsung LN-R 408 LCD TV

I have a Samsung LN-R 408 DX/XAA - LCD TV built in 2005. I had the dreaded “clicking” every 30 seconds, with no picture or sound. I had a new thermister soldered in and that worked for about a month. I finally got a new power supply board unit (BN97-00457E) off Ebay from ElectroParts about a year and a half ago. A month ago, when I turned the TV on, it would have this really loud distortion screeching of the sound of whatever channel was on. I could hit the side of the TV to fix it. Or, wait a few minutes, when it would get even louder for a minute, then fix itself. Now it takes longer and longer to fix itself. And hitting the TV doesn’t always work. Once it fixes itself, it’s fine, until I turn on the TV the next time. I disassembled the TV looking for a loose speaker wire, but couldn’t find any problems. ElectroParts says I probably need to get a new power supply board but that doesn’t sound like a problem that is fixed by hitting the side of the TV. Does anyone have any experience with something like this? Thank you.

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oldturkey03 @oldturkey03

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投稿日: 2019年6月21日

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@dbk

could be a power board issue but try a different output first. see if you can connect a sound boar or even headphones and listen. If that fixes it it’s your speaker.If it doesn't. I’ll be looking at a new main board first since that is where the audio IC is which could possibly be that cause for this.

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can you let me know how I would try a different output? I don’t have a sound board or headphones.

Thank you.

Dana Kaplan さんによる2019年6月22日

@dbk any other speaker available you could use?

oldturkey03 さんによる2019年6月22日

Where would I plug it in?

Dana Kaplan さんによる2019年6月22日

Hi @dbk ,

If you have an audio receiver you can connect the TV to it from the TV's audio out jack or digital audio output if your receiver accepts digital audio.

Here's a link to the user guide showing the audio outputs (#3 & #9) You may have to adjust the sound settings if opting for the digital connection.

There'also a headphone socket but you state that you don't have headphones. Do you have earphones for use with a mobile phone?

Usually the headphone socket on a TV is the same as the earphone socket in a mobile phone so if you have a pair, try them and listen if it works OK.

jayeff さんによる2019年6月23日

Thanks for the help, I need to make this TV last a couple / few months longer. I plugged in a set of earbuds to the port on the back of the TV, and it acted the same: loud distorted volume, lasting a few minutes, after which I could hit the top of the TV hard and that would “fix” it.

What is “audio IC “?

Dana Kaplan さんによる2019年6月23日

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can you let me know how I would try a different output? I don’t have a sound board or headphones.

Thank you. — Dana Kaplan
Hi @dbk ,

If you have an audio receiver you can connect the TV to it from the TV's audio out jack or digital audio output if your receiver accepts digital audio.

Here's a link to the user guide showing the audio outputs (#3 & #9) You may have to adjust the sound settings if opting for the digital connection.

There'also a headphone socket but you state that you don't have headphones. Do you have earphones for use with a mobile phone?

Usually the headphone socket on a TV is the same as the earphone socket in a mobile phone so if you have a pair, try them and listen if it works OK. — jayeff
Thanks for the help, I need to make this TV last a couple / few months longer. I plugged in a set of earbuds to the port on the back of the TV, and it acted the same: loud distorted volume, lasting a few minutes, after which I could hit the top of the TV hard and that would “fix” it.

What is “audio IC “? — Dana Kaplan

Samsung Television

Distorted sound initially with Samsung LN-R 408 LCD TV

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