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Faulty board 687cqze009e on an lg 42v5, emits loud buzzing when turned on, screen does not display anything

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Hi under heat skin short circuit it 's the same probleme in all 42v5

Posted on Sep 10, 2008

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Posted on Jan 02, 2017

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GE Microwave (JVM1860CD001) control board buzzes.


see this causes and fix it. God bless you
Magnetron If the microwave is loud or noisy only when cooking, the magnetron tube might be defective. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. Under normal circumstances the magnetron is nearly silent. However if it is damaged or nearly burned out it can begin emitting high pitched or growling noises. It's not normally dangerous to use a microwave oven when it makes these noises, but they are an indication that the magnetron is almost dead and will need to be replaced.
Exhaust Fan Motor If the microwave is loud when running the fan motor might be
Stirrer Motor If the microwave is loud or noisy the stirrer motor might be worn out. The stirrer is a metal blade which slowly turns around, deflecting the microwave energy in a random pattern inside the microwave oven. As the motor nears the end of its useful life it begins to make grinding noises. The microwave will not heat food evenly without this stirrer, the motor should be replaced.
Turntable Motor If the microwave is loud or noisy the turntable motor might be worn out. This is a common problem and relatively easy to replace.
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Oct 10, 2012 | GE Microwave Ovens

1 Answer

I have a Mitsubishi 42"


Check the flex that connet from the panel to the screen, if it is ok then change the screen.

Aug 09, 2011 | Televison & Video

1 Answer

I have a 3M STV Digital 6 surround sound system. The receiver is emitting a loud buzz the minute I plug it in. The only way to eliminate the buzz is to unplug the power cord. Any suggestions to remedy this...


A loud hum could be caused by an Earth loop. This is caused by connecting various stereo equipment into different mains power outlets.
To overcome this problem, use a power board and plug all the stereo equipment into this single power board.

May 27, 2011 | Audio Players & Recorders

1 Answer

Humming sound


Samsung states - A buzzing sound from your plasma TV is normal. It is caused by the electrical charges used to create the images on the screen. The buzzing, however, should not be so loud that you can hear it when the volume on the TV is set at normal levels.It is also important to determine the type of buzzing sound. A sound like a ground hum is completely normal. This buzzing can originate near the power cord connection or from the SMPS board position on the upper back of the TV. The buzz will be more audible as contrast increases on the screen, most notably when displaying an all white screen. If the buzzing sound is loud, you may have the Contrast set too high. Lower the contrast to reduce or eliminate the buzzing.You may also have loud buzzing if the rear of your Plasma TV is too close to a wall or other hard surface. Try moving your TV away from the wall until the buzzing is minimized. [1]
If the buzzing is at a higher frequency and resembles a crackling sound (like the sound of Velcro being pulled apart), and originates from the upper middle back of the TV, you likely have a failing SMPS board. Place a support call with Samsung to have the SMPS board replaced.FP-T5084 Have a known buzzing problem with a very simple fix.If the buzzing is coming from the left or right sides of the rear and the volume can be changed by pressing lightly on those locations, you are probably hearing the vibration of the grounding springs on the back panel. Call Samsung (or whoever) and have a technician confirm the problem. The easiest fix is to insulate the offending spring by applying some felt tape.

May 22, 2010 | Vizio P2 42 in. HD-Ready Plasma Television

1 Answer

Sub woofer buzzes all the time, do I have to replace the speaker or can this be repaired?


ur sub wont buzz due to bad speaker. either u have a faulty preamp or power amp. yes it can be repaired and will not cost much. if it is loud and annoying, get it repaired. sometimes subs emit low hum when powered up. this is the way the are desinged.

Apr 13, 2010 | Kenwood SW-306 Speaker

1 Answer

LG 42'' Plasma 42PC1DV loud pop,buzzing, no picture cracked screen


pdp panel cracks need replaced
Manufacturer LGE 42PC1DA Part Number EAJ42047868 Description 42 INCH_XGA PDP MODU

Manufacturer LGE 42PC1RV Part Number EAJ42007501 Description PDP,MODULE-VGA

Oct 04, 2009 | Televison & Video

1 Answer

Monitor makes loud screeching vacuum sound; no screen display..?


check to make sure that there arent any magnets near or around it

Apr 13, 2009 | HP Vs17 17" LCD Flat Panel Monitor

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