An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert whose answer got voted for 20 times.
An expert who has answered 20 questions.
Re: Our LG LCD tv is giving an intermittent flicker noise
It is a problem with the main board, and it should be covered, most people dont know this, but LG has 2 year manufacturs warinty on most of there tv's, and if they say it isnt covered, you usualy can talk to customer relations, and they will cover the part, but not the labor to put it in
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Jan 7, 2010 - 26 posts - 15 authors
Hi, I have a Samsung LN40A550 LCD TV which I have had for just over a year. ... I was watching TV yesterday and all of a sudden the picture went all. ... started makinga very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen.
Try looking for the remote sensor. It should look a little like a camera lens or little red tinted window. If you cannot find it just give the entire front of the TV a good cleaning. Finger prints and dust build up can interfere with the signals. Do the same for your direct TV box.
If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Take it to a repair shop.
Line noise is feeding in from the AC line.
Use an AC liner filter to block the line noise.
RF (radio frequency) interference is being picked up by the power line or wiring.
Remove sources of RF interference, such as fluorescent lighting
or wireless devices not designed to work with audio/video equipment.
Wires between the components are on top of one of the components; the transformers are causing RF interference.
Be sure that wiring goes behind the components rather than on top or between components.
If there is an equalizer in use, there could be a ground loop.
Ground loops can be resolved by installing GLI's (ground loop isolators) on the cables connecting to the equalizer.
It sounds like HD mode on the TV operates at a different frequency (refresh rate) that then causes interference to your nearby police scanner. There's not much you can do about this--the HDTV design cannot be modified.
Your best solution is to try moving the police scanner further away from the TV. I doubt there is any kind of barrier that you can place around the scanner that might block the interference (the "noise" given off by the TV is likely omnidirectional).