Hello. I have a Samsung LCD tv from around 2009 and its worked fine until about a month ago when it crapped out. I at first noticed that after long periods of use it would refuse to turn on right after it had been shut down. To remedy this I would simply unplug the set for a while and try again and it seemed to work for about a month but with each successive attempt the waiting/cool down time increased.
The set now fails to power on at all. When I press the power button on the remote control the backlight will light up and the power indicator LED will flash five times from its previous solid state. At the fifth flash the backlight will then shut off and the power indicator LED will continue to flash five more times at which point the unit repeats the power cycle. Never is there a picture or sound.
I decided to take a look inside and see if I could spot any obvious issues. I visually inspected the components on the PSU and nothing stuck out other that what I thought to be some heat marks under one of the transformers. I ended up replacing the board with a used one off ebay but failed to fix the issue.
I also noticed that if I disconnected the ribbon to the main board from the PSU then the backlight would remain on indefinitely and no blinking LED when I would power on the set. Plus, all output voltages were present as indicated by the pinout labels.
I'm stumped on this and would appreciate any leads or insight. I have a cheap DMM and some Yihua hot air and soldering machine so I'm willing to go all in. Please let me know what info can be useful.
Thank you for your time.
Higher res photos.
https://drive.google.com/folderview?...TA&usp=sharing
The set now fails to power on at all. When I press the power button on the remote control the backlight will light up and the power indicator LED will flash five times from its previous solid state. At the fifth flash the backlight will then shut off and the power indicator LED will continue to flash five more times at which point the unit repeats the power cycle. Never is there a picture or sound.
I decided to take a look inside and see if I could spot any obvious issues. I visually inspected the components on the PSU and nothing stuck out other that what I thought to be some heat marks under one of the transformers. I ended up replacing the board with a used one off ebay but failed to fix the issue.
I also noticed that if I disconnected the ribbon to the main board from the PSU then the backlight would remain on indefinitely and no blinking LED when I would power on the set. Plus, all output voltages were present as indicated by the pinout labels.
I'm stumped on this and would appreciate any leads or insight. I have a cheap DMM and some Yihua hot air and soldering machine so I'm willing to go all in. Please let me know what info can be useful.
Thank you for your time.
Higher res photos.
https://drive.google.com/folderview?...TA&usp=sharing
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