I recently got this set for free off a craigslist ad and I need some help on getting it working again. When I first brought it home and plugged it in, the backlight would come on, but that was it. I researched the problem and found that there were some capacitors that were known for going bad on this TV's main power supply board, most notably C235. When I opened it up to no surprise, C235 was blown. I decided to replace C235 and the 3 others that were like it (C201, C202, and C219 I believe) even though they hadn't failed yet with some 25v 2200uF nichicon caps (the original caps were only 10v, same value though).
When I reinstalled the board and powered it up, I noticed that the backlight wasn't working anymore. I also noticed that there's an HDMI light lit up now along with the power light. When I plugged in a HDMI input, I was able to get sound out of it. I retouched all the joints I made and checked the areas around them, but everything looked fine to my eyes. I can get pictures of the board tomorrow if that would help.
There's a red connector at the top of the board that I believe goes to power the backlight inverter, but that seems to be the only connector on that board that doesn't have a pin diagram, so I have no clue what the voltages for the pins on that connector are supposed to be.
I also saw a set of possible diagnostic lights on the main board: D300 and D301. They are tiny LEDs and they appear to be letting off a code of some sort. D300 lights up, then it goes out and D301 comes on, it repeats that again, then they both come on and blink once at the same time before restarting the pattern. I can get a video of that tomorrow if needed, it appears to start doing that when it realizes that the backlight isn't coming on.
I'm not quite sure on where to go from here, if there's anything I can do to try to fix this or if I should just steal its hard drive and toss it. Thanks!
When I reinstalled the board and powered it up, I noticed that the backlight wasn't working anymore. I also noticed that there's an HDMI light lit up now along with the power light. When I plugged in a HDMI input, I was able to get sound out of it. I retouched all the joints I made and checked the areas around them, but everything looked fine to my eyes. I can get pictures of the board tomorrow if that would help.
There's a red connector at the top of the board that I believe goes to power the backlight inverter, but that seems to be the only connector on that board that doesn't have a pin diagram, so I have no clue what the voltages for the pins on that connector are supposed to be.
I also saw a set of possible diagnostic lights on the main board: D300 and D301. They are tiny LEDs and they appear to be letting off a code of some sort. D300 lights up, then it goes out and D301 comes on, it repeats that again, then they both come on and blink once at the same time before restarting the pattern. I can get a video of that tomorrow if needed, it appears to start doing that when it realizes that the backlight isn't coming on.
I'm not quite sure on where to go from here, if there's anything I can do to try to fix this or if I should just steal its hard drive and toss it. Thanks!
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