I picked up an LG 32LC2D-UD TV (April 2006) on the side of the road recently. Was very dusty, and back had been unscrewed completely in apparent attempt to diagnose. Visual inspection showed no bulged caps except one smaller one very slightly bulged.
Powered on and green light flashed for a while, then steady. Black screen, no backlight. Flashlight showed menus appearing. Powered on and off many times while looking for best universal remote code. Then one time it turned on, backlight was working fine, but screen was now black and showing no menus.
Today I replaced the slightly bulged cap, C208 on the main switching power board, center-right, next to right upper heat sink. It was a 680uF 16V (SAMXON black shell, 105 C GF(M)), which I replaced with a 1000uF 16V I had removed from a junk PCB in my bin. TV's worked perfectly afterwards, and I notice that flashing green light when first powering up lasts about half as long as before. Too bad I hate digital TV picture quality, deinterlace artifacts, etc. Will probably give to family member.
It still surprises me that a little cap like that could be causing such trouble.But that was the same fix on that Dell LCD monitor before this. I'm also surprised at how subtle the bulge was visually. Before I replaced it I kept shining a flashlight at it asking whether it was really bulged.
Powered on and green light flashed for a while, then steady. Black screen, no backlight. Flashlight showed menus appearing. Powered on and off many times while looking for best universal remote code. Then one time it turned on, backlight was working fine, but screen was now black and showing no menus.
Today I replaced the slightly bulged cap, C208 on the main switching power board, center-right, next to right upper heat sink. It was a 680uF 16V (SAMXON black shell, 105 C GF(M)), which I replaced with a 1000uF 16V I had removed from a junk PCB in my bin. TV's worked perfectly afterwards, and I notice that flashing green light when first powering up lasts about half as long as before. Too bad I hate digital TV picture quality, deinterlace artifacts, etc. Will probably give to family member.
It still surprises me that a little cap like that could be causing such trouble.But that was the same fix on that Dell LCD monitor before this. I'm also surprised at how subtle the bulge was visually. Before I replaced it I kept shining a flashlight at it asking whether it was really bulged.
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