LG forum

Question

LG TV (LCD, 47'') working but making a Chirping noise.

by Cromodus / February 19, 2013 2:16 AM PST

I've been using a TV as my computer monitor for years. (LG LCD 47''). Recently, I noticed that while I'm playing a game, the TV sometimes makes a high pitched noise, like a cricket or a chirping noise. I only hear it while I'm actually playing a game. If I pause it and browse the option menu, it stops. Similarly, it's louder or fainter depending on what I'm ''looking at'' in the game. I didn't notice a distinct pattern.
I googled this but I only found situations where the TV wasn't working anymore. Mine is working perfectly fine, except for the noise.
Thanks for the help, let me know what else I can find out.

Discussion is locked
You are posting a reply to: LG TV (LCD, 47'') working but making a Chirping noise.
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: LG TV (LCD, 47'') working but making a Chirping noise.
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.

All Answers

Collapse -
Answer
So do you know your electronics?
by R. Proffitt Forum moderator / February 19, 2013 2:24 AM PST

That is, a common noise source in TVs and many other things is the common -> coil <-. And your old electronics tech has a bottle of spray shellac handy to quiet such a part if they don't want to replace it. Here's an article about this.

http://music-electronics-forum.com/t26998/

Ahh, that's the term to know too -> microphonics <-.
Bob

Collapse -
clarification
by Cromodus / February 19, 2013 2:45 AM PST

So, if I understand correctly, one of the coils in my TV is vibrating and making that noise.

Is it dangerous? Will it lead to the TV breaking completely?

As for applying Shellac, how can I find out which coil is making noise? If I'm going to do this myself I would need some sort of guide to make sure I don't make things worse.

Thanks,

Collapse -
As the technician
by R. Proffitt Forum moderator / February 19, 2013 3:21 AM PST
In reply to: clarification

You use your tools to find it. When such issues were more common years ago (Tubes? remember those?) I had a stethoscope to help me find the singing coil if I wasn't quite sure.

Today you see it still such as http://www.amazon.com/Lisle-52500-Mechanics-Stethoscope/dp/B0002SQYSM

As to the guide, I wonder if there is such today on the web. Back them it was in most repair manuals. Seems these old problems are new again (to many!)

As to making it worse, when microphonics is in question, sure, the new sound it makes if you don't silence it could be worse. Sort of dub step vs disco?
Bob

Collapse -
Answer
TV repair solution
by tristanih / January 12, 2016 2:13 AM PST

My TV makes a chirping noise and does not come on. Solution?

Collapse -
Re: solution
by Kees_B Forum moderator / January 12, 2016 3:10 AM PST
In reply to: TV repair solution

You nailed it: repair is the solution.

Kees

Popular Forums
icon
Computer Newbies 10,686 discussions
icon
Computer Help 54,365 discussions
icon
Laptops 21,181 discussions
icon
Networking & Wireless 16,313 discussions
icon
Phones 17,137 discussions
icon
Security 31,287 discussions
icon
TVs & Home Theaters 22,101 discussions
icon
Windows 7 8,164 discussions
icon
Windows 10 2,657 discussions

CNET FORUMS TOP DISCUSSION

Help, my PC with Windows 10 won't shut down properly

Since upgrading to Windows 10 my computer won't shut down properly. I use the menu button shutdown and the screen goes blank, but the system does not fully shut down. The only way to get it to shut down is to hold the physical power button down till it shuts down. Any suggestions?