Question about Polaroid FLM-3734B 37 in. LCD HDTV

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Hum Our set hums until it is warmed up. I see that there is a solution posted somewhere with details, but am unable to locate the instructions.

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Posted on Sep 18, 2008

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Sanyo DP26640 LCD TV won't power up. Is there a fuse somewhere inside?

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See more detailed question below.

Set-up (Programming) procedure is too much to type in here, and is not practical and it will differ brand-to-brand remote controls. If you wish to get more; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. One among it has general set-up codes to check with TVs and other devices are given, in the order of the 'device's brand name list' in alphabetical order. Pull up older posts. Search the sites by type in the brand name to your device in its search box at the top right part of the display window. It will help you to find the document easily.
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My 2013 LG 42pn4500 plasma works fine until you change anything on the remote (volume, inputs, etc). As soon as you touch a button on the remote, the tv powers off for 5-10 minutes then comes back on....

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Dec 01, 2014 | Flat Panel Televisions

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How do i fix the humming in the volume

If the audio output IC is faulty, Hum will be heard, even if the volume level is set to [Zero].
Check the speaker/s first. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. Surf the site with patience.

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Aug 28, 2012 | Flat Panel Televisions

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Where can I find detailed instructions

Visit this site.For more details, just type in the site name "Electro-help" to your search engines' search box [not in the address bar of your browser], and click search. It is an electronic equipments service help site.

All details you want are there. Note the position of hyphen in between words in site name, when you type it in. The site will appear as it is in web; subtitled as Service help to electronic home entertainment equipments.

Pull up older posts. You can get all details.

You can locate it either at the bottom part of first search page, or at the top of second page. Detailed descriptions are there to help you.

Sometimes, clicking on advertisements by the side and bottom of each post might help you to get details about the availability of spare parts; price etc:-

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My Polaroid LCD TV has humming sound when turned on. The humming sound die after the TV has warmed up.

That is a transformer squealing. That will be on the backlight inverter. Use it until it stops working and then you will need a replacement.

Thank you!

Jul 11, 2011 | Polaroid FLM-323B Television

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Vizio 42'' HDTV flatscreen

The TV usually hums when the backlight setting is too low. So turning it up should get rid of the problem. To do this please follow these instructions:

1. Turn the TV on.
2. Press the Menu button on the remote, located right below the channel changing button.
3. Press the down direction button, located at the middle of the remote. Press that button until the backlight is highlighted.
4. Press the right direction button until the backlight is at 100.
5. Press the OK button and then the Exit button until you get back to your picture.

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Picture won't come in clear until TV "warms up" for 15 minutes or more

Change the capacitors first per the instructions in the link below. Symptoms could be anything from high-pitched hum to no picture at all. On these defective models, I would start at the caps and work back. It won't hurt to replace them anyway.

Aug 28, 2008 | Polaroid FLM-323B Television

1 Answer


If the noise starts out fairly loud and decreases or dissapears after a warm up period this is probably the cap problem,which has a detailed solution posted on Fixya.If you replace the 2 caps ,while you are in there I suggest replacing the 3rd 1000 microfarad cap that is very near the 2 10 volt units which are definately bad ones.The repair posting is very good,and if you or a friend can solder it is easy to do.The instructions are really very good.

Aug 14, 2008 | Polaroid FLM-3734B 37 in. LCD HDTV

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