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!
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.
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. :-)
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.
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.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=Proscan+42LA45H+
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:
http://www.shopjimmy.com/catalogsearch/result/index/?q=Proscan+42LED55SA+&stock=all
I hope it is still under warranty.
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
303 views
Usually answered in minutes!
Parts are too expensive for a repair, it is more cost efficient to purchase a new set.
×