Question about Proscan 42LA45H 42 in. LCD TV

1 Answer

Proscan 42 lcd makes a humming noise and the color starts breaking down in the color blocks and the screen sometimes flickers

Posted by Jon Kochan on

  • Jon Kochan Aug 31, 2012

    Parts are too expensive for a repair, it is more cost efficient to purchase a new set.



1 Answer

Robert A. Watson

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 774 Answers

The LCD is breaking down and the voltage regulator in the power supply (hence the hum) can't provide enough gain to energize the crystal so it flickers and acts up. These often get damaged in transit. (Time for a new TV/monitor. Bear in mind that such consumer electronics only have a useful life of 6 years.) These off-brand TVs purchased from supermarkets like COSTCO and Wal-Mart are notoriously problematic. Take it back, if you can and demand your money back. Don't get another one to replace it! Depending upon where you live, most consumer electronic devices have an Implied Warranty (unwritten) of one year from the date of purchase for merchantability (meets safety standards) and free of defects. It may also have a Specific Warranty (written) which lists other conditions. Stick with reputable brands like Panasonic, LG, Samsung, Philips, Toshiba, and Sony, if want some measure of quality control and reliability. There is a reason why they cost more!

Posted on Aug 27, 2012


5 Related Answers



  • 65 Answers

SOURCE: i have a 42

Is this an LCD, Plasma, DLP or CRT television?

This sounds like you have trouble with the powersource or flyback on your television, they usually are a couple of hundred dollars to replace.

Posted on Sep 10, 2009



  • 2 Answers

SOURCE: Volume noise after warm up

YES! I had this problem and there are others here under humming.

Standing in front of the TV, make your volume zero.
Punch in --very quickly-- 9876
If it worked, it will open a new menu. Go down to the Backlight and enter. Move it up to 83 from 81.
Hit menu twice.

Now try it and see if your hum is gone! [I think I was starting to go deaf trying to hear the volume over the buzz!]

I will warn you to try it a few times. At one point it shut off on me in the middle and if this happens to you, expect the volume to be BLARING when you turn it on again. :-)

Posted on Mar 10, 2009

Dale Hunter

  • 157 Answers

SOURCE: 42" proscan lcd

you can replace the plug and resistor but make sure you remove any carbon that may of happened,you should be able to scrape it off.if you dont have any luck repost with part number.

Posted on Sep 21, 2009


Bud Martin

  • 11361 Answers

SOURCE: I have a proscan 42LA45H 42 in television that has

Need to locate the source of the noise first, open up the back and look for any sign of damages, power supply will be the first place to look.

Posted on Dec 18, 2009


Bud Martin

  • 11361 Answers

SOURCE: I have a 42" Proscan

That sounds like either bad T-CON board or main board, need real in-depth troubleshooting.
You can the parts here:

I hope it is still under warranty.
Failed TV and Monitors:
Learn about bad caps:

Posted on Dec 30, 2010

Add Your Answer


Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Proscan tv power light blinks red and won't turn on, it normally is solid red when off and turns blue when on. whats wrong?

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.
Check the cables, connectors and connections.
Take it to a repair shop.

Aug 28, 2014 | Proscan 42LA45H 42 in. LCD TV

1 Answer

Television buzzing noise

Sounds like the audio output IC has damaged. Chekc and replace damaged component/s at its audio output stage circuit, or replace the audio output card. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. Electro help

Jan 07, 2014 | Proscan 42LA45H 42 in. LCD TV

1 Answer

Proscan tv flickering

My proscan did this. I took off the back. Spotted the buldged capacitor. Went to Fry's to find a replacement. They didn't have one but they referred me to someone down the street. Called, he had it. Cost like 2 bucks. Got a soldering kit for 15 bucks. Removed and replaced. And it's like brand new again! 4 years later, the main board is going out :/ that's not so cheap.

Apr 26, 2012 | Proscan 42LA30H 42 in. LCD Television

2 Answers

Volume making humming noise when on

there is a bad ground.
the hum you are hearing is ac getting into the audio.check all the rca plugs on the set are plugged in all the not run them close to a power bar either.
sometimes a second unit with it's own volume is hooked up to the tv and then the tv volume is up too high because the other box is turned down.if there is a unit hooked up,turn it's volume up ,and the volume on the tv down,otherwise the tv will amplify the residual noise.cheers,ed

Jul 04, 2009 | Proscan 32LB30H LCD TV

3 Answers

My proscan is buzzing and pix is flickering when the power is on.

I found this solution on another review, hope it works
Model Number: Proscan 26" LCD HDTV w/ Built-in DVD Player26LB30QD "pro: good price, TV picture is clear and DVD player is compatible well.
con: sound noise
There was hum when I first turned the TV on, then I followed these instructions (found it from other review) to fix the hum issue:
1. Turn tv on
2. Input mode should be tv
3. Turn volume to zero
4. With remote enter 9 8 7 6
5. A menu will appear on left side
6. Arrow down to backlight and with right arrow key move number from 81 to 83, press menu button twice,
7. Turn up volume and listen if hum is gone."
It works,no hum."

Feb 26, 2009 | Proscan 42LA30H 42 in. LCD Television

1 Answer


I am sorry Sir, the display panel is bad. If you purchased it new, it should under factory's warranty. Please call Proscan for a warranty repair.

Proscan Customer Service:
1-800-968-9853 (US and Canada)

May 31, 2017 | Proscan 42LA45H 42 in. LCD TV

Not finding what you are looking for?
Proscan 42LA45H 42 in. LCD TV Logo

245 people viewed this question

Ask a Question

Usually answered in minutes!

Top Proscan Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76432 Answers

matt martin
matt martin

Level 3 Expert

1258 Answers

Cindy Wells

Level 3 Expert

6195 Answers

Are you a Proscan Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides