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Router makes a buzzing sound

Relay or device at K1 buzzes when power applied. LED D1 shines Red when power applied. (Power LED) No radio activity detected

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Buzzing sound from my hisense led LCD tv


The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Sep 30, 2016 | Generic F46K20E Hisense 46 in. LCD HDTV

1 Answer

Hi, I have a panasonic viera TH-P42S10A with the 5 red flashing lights issue. I ordered another power supply board (ETX2MM747MF) thinking that was the issue, but no change. With everything plugged into the...


By replacing the power supply only; the set will switch On. You have to adjust the Va & Vs voltages. These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. Viewing it in "Mosaic" or "Magazine" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience. Do a search by type in the brand name of the device to the search box.

May 13, 2014 | Televison & Video

1 Answer

Westinghouse tv power box making buzzing sound


Hi I'm Peter, There is a bad connection and most likely the buzzing sound is a relay going bad internally.

Apr 19, 2014 | Westinghouse Televison & Video

2 Answers

I think the cpu fan is going out in my dell laptop. Can I replace it? Or is it not possible?


Yes you can replace it. You need schematics on how to remove and replace the fan.

Mar 24, 2010 | Dell Studio 17 Laptop

2 Answers

Red power light and buzzing sound with red lamp light.


My Sony lost its picture and had a flashing light. Unplugging for 36 hours solved the problem.

Mar 29, 2009 | Sony KDF-E60A20 60 in. LCD HDTV

1 Answer

Advantium 120 makes low buzzing sound all the time


this is the transformer that is doing it and it may end up failing soon , and should be replaced before any other dammage is done,

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1 Answer

Buzzing noise from radio


the sound is the generater's ac power and the rectifier that filters the ac to dc in the radio is starting to fail or a filter inside the radio is failing to filter out the ac power

Oct 18, 2008 | 1998 BMW M3

1 Answer

Buzzing noise from speakers


The buzzing noise is being heard probably because there is another electronic device around that's using radio waves to function. (Such as a cell phone, a cordless phone adapter or a wireless router. Even microwaves and ceiling fans can give off these sounds.)

My advice would be to try and move around or turn off some appliances in your room that may give off radio waves.

Sep 18, 2008 | Logitech Z-2300 Computer Speakers

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