I have a 27 inch sanyo tv that is several years old. Today it started drawing blue lines around heads and down arms. As well it is causing horrible face distortion from different angles. They look like the "living dead!!!
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A tv that old isn't worth more than $100, The part could cost half of that or even more depending on the exact model, definitely not worth it. A tv that size is a decent price today, Just buy a tv that can get a digital signal and you will be set for next year with it. Let me know if you need anything else
lcd or plasma.
are the lines solid or blurred. do they have sharp edges.
You may have a memory problem with the display which can only be repaired by factory trained technicians, or a brave soul willing to find parts on ebay.
TV's have a circuit that monitors the high voltage and shuts down the set if it senses something amiss.
Figure on replacing the flyback transformer.
However, my experiance is to not put money into a TV that is over ten
years old. TVs stress out their electronic components worse than
almost any other electronic product. After 10 years, there are so
many parts that are ready to fail that your are probably wasting your
money trying to get any more life out of it.
Another option is to wholesale replace the main board from an outfit like PTS Electronics at ptscorp.com.
Hope ya fix it!
You have a problem is in your horizontal section which also is part of your power supply. The high pitched whine is from the Intergrated High voltage transformer (also called the flyback transformer). This sound occurs when the freuency of the transformer changes and or the voltage gets too high. The click occurs as a result of the drawing of excessive current by the HOT Horizontal output transistor. This is repairable, but requires the correct equipment and a schematic.
as you said, this is a scan problem, but maybe not from the 'board' itself but maybe the flex cable. sometimes it becomes loose and it makes a bad connection between the panel and the board. if the tv is under waranty: please call LG service customer they are very friendly and thay can give you a reference number that will get you a free repair in an authorized LG service center... anyway thats the way we work around here (qu?bec,canada). let me know