This LED backlit LCD TV originally came to me dead. I followed this thread:
https://www.badcaps.net/forum/showth...t=westinghouse
The original issue turned out to be a burnt ribbon cable end that supplied power to the right half (as viewed) of the LED backlight strip. I cut a quarter inch off the bad end, shaved some plastic back to expose conductors, and reinserted the ribbon cable. The unit lit up fine, and had a pretty good picture for a lower-priced HDTV. I assembled the unit and ran it for "burn-in testing".
Upon running overnight, the unit has developed a new failure. The screen has the same problem everywhere. Images are not bright enough, except at high brightness areas of the image. The gray areas are nearly black. White is white. When the image disappears, it persists for a short time. Moving images leave trails, kind of like the mouse pointer on a laptop.
Preliminary troubleshooting reveals that the power supply seems OK. I have 12V, 5V, 3.3V and supply voltage for the LED sticks. Suspecting a loose tab, I pinched all the tabs around the LCD panel while watching the screen, no change in picture. I reseated the LVDS cable and the ribbon cables connecting the receiver boards. No change in picture.
https://www.badcaps.net/forum/showth...t=westinghouse
The original issue turned out to be a burnt ribbon cable end that supplied power to the right half (as viewed) of the LED backlight strip. I cut a quarter inch off the bad end, shaved some plastic back to expose conductors, and reinserted the ribbon cable. The unit lit up fine, and had a pretty good picture for a lower-priced HDTV. I assembled the unit and ran it for "burn-in testing".
Upon running overnight, the unit has developed a new failure. The screen has the same problem everywhere. Images are not bright enough, except at high brightness areas of the image. The gray areas are nearly black. White is white. When the image disappears, it persists for a short time. Moving images leave trails, kind of like the mouse pointer on a laptop.
Preliminary troubleshooting reveals that the power supply seems OK. I have 12V, 5V, 3.3V and supply voltage for the LED sticks. Suspecting a loose tab, I pinched all the tabs around the LCD panel while watching the screen, no change in picture. I reseated the LVDS cable and the ribbon cables connecting the receiver boards. No change in picture.
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