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42la20h flickers when i power on and i can hear buzzing sond in back of unit

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If you hear it with sound turned off it likely is coming from the power supply---either the problem or set reacting to a problem there.

Posted on Dec 10, 2012

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Broken lc-42sb48ut


I would look to see if this unit has a back light and if so it may be your problem--either the actual back light or the voltage source that powers it.

Not likely to be a do it yourself repair.

Apr 29, 2012 | Sharp LC42SB48UT 42 in. LCD TV

1 Answer

Display flickers, no image is displayed, buzzes at same time it flickers. tried it on multiple computers, same thing


jglendenning, If not into soldering irons, solder, meters, and electronic repair of "switch-mode-power-supplys/cold-cathode-fluorescent-lamp ballast-circuits" then trade for new unit! Retrevo .com lists K717s as time to retire unit. Before you do anything check out the longer and more useful video clips at YOUTUBE that deal with "lcd monitor disassembly" and "lcd monitor repair" FYI so you at least know what is inside a typical desktop CCFL back-lit LCD monitor. 99% use same basic design and principle of operation no matter what brand of unit you have or will purchase in future!!! Hope this helped some. 12fixlouie

Jul 27, 2010 | KDS K717s 17" LCD Monitor

1 Answer

Pinstripe cinema display flickers on momentarily then goes black. Image comes back for a split second while when power light glows steadily then goes away while power light flickers. this is a 22"...


when the screen is black and the power light is steadly lit, shine a flash light at the screen. if you can see something, the inverter board is bad and the back light cannot turn on. if the power light flickers, reseat the power plug and put your ear to the back of the monitor where the power plug is. if you hear a buzzing or any high pitched noises; the power supply is bad. use the macufactures warranty for repairs.

Nov 18, 2009 | Computers & Internet

1 Answer

SENDING UNIT ???????


most of fuel pumps were in tank, wire corrodes is harness under right front seat floor pan to tank
if fuel pump buzz is heard and car runs and when it doesnt run you cant hear the fuel pump try
turn ignition off wait 10 seconds
turn ignition to on position to (prime or hear pump buzz)
no buzz fuel pump not working check fuel pump relay(swap with another) and try again?
you could use test light to pump wiring and make sure your getting power to pump on this prime test no power relay or wiring problem.
power at pump, but no buzz fuel pump faulty

Jul 01, 2009 | 1997 Isuzu Rodeo

2 Answers

Samsung, same exact problem - flickers on power up for a few min


This sounds like a power supply problem, how old is the monitor? If it is not new in the last year and is used regularly it sonds like a faulty capacitor in the power supply. If you are aware of the precautions necessary when handling capacitors and a moderatly competent solderer then you can replace then yourself - a complete set of capacitors usually costs around £3 or $5

Jun 27, 2009 | Samsung SyncMaster 204B 20.1" LCD Monitor

3 Answers

Won't power up; push power button on, hear click in back left of unti, get nothing on front display and no output from speakers; as if unit trying to operate


Disconnect the speakers and see what happens. Carefully examine the speaker cables for unwanted connections (shorts).
Take a clue from when the power problem appeared. Something was moved and made the buzz a (probable) dead short.

May 16, 2009 | Pioneer VSX-305 Receiver

1 Answer

Outside Unit blowing air but not cooling and slight buzzing sound


The compressor is not coming on and some part of that unit has failed. Do you hear any clicking sounds along with the buzzing sound? Recommend that you shut the unit down (remove power from it) until a service tech can listen to it try to start up.

The power company-installed load management system is probably a red hearing. That system will either fully turn off the unit or allow it to turn on/start up.

May 08, 2009 | Heating & Cooling

1 Answer

Proview fv-926afw 19'' LCD flickers and buzzes


If you have a capacitor tester.. i'll be much better at least you would know which caps that actually failing..
I would replace all the caps if you dont have the tester.. and while your at it. try to resolder connections and some parts like transistor etc.. maybe they have "cold solder"

May 04, 2009 | Panasonic Computers & Internet

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,

Nov 06, 2008 | GE Advantium 120 Convection/Microwave Oven

2 Answers

Noise coming from power supply


When we turn our TV the humming and buzzing begins! We cn mute it and it goes away and then it when we turn the sound back on the sound is back! How can we fix this?

Sep 18, 2008 | Polaroid FLM-323B Television

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