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SOURCE: I have a Samsung LN32A550 LCD TV. When I turn on
One thing you can try IF you know how to work with electronics.
Unplug and remove back cover. Remove the metal cover on the LCD Controller card. (it near the top of set) You may have to disconnect the top of the "H" frame to get to it. Disconnect and carefully re-connect the flat ribbon cable for the left side of the display. (The right side is good so don't touch it.) The connector for the flat ribbons will flip up to release the ribbon. The ribbon is short so this is tricky to do right. You may need a small plastic tool to help. Dont' break the connector. With the card back in place check if the band is still present. If vertical lines appear on the display, unplug and reposition the cable again until they are gone.
Don't touch the contacts on the connectors.
Re-assemble the set. No parts should be left over !!
LCD Controllers for this set are for sale on eBay if need.
SOURCE: MY NEW SAMSUNG LN32A550 TV HAS A HUM FROM THE SPEAKERS
In most cases it's the Cable issue. Either bad Cable Box or the Wires are not grounded properly. Disconnect the Audio Cables or the COAX cable from the Cable Box and see if the Humming noise goes away.
SOURCE: samsung ln32a550 is cracked lcd panel
The part # you need is: BN07-00574A. There may be a substitute for it, but that should get you going. You could try www.partstore.com, or just plug that part # into Google.
You'll come up with some.
Expect to pay $300.00 on up.
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