Question about Proscan 42LA45H 42 in. LCD TV
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
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
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
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
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: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Posted on Dec 30, 2010
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