Hey folks, I need some help diagnosing and fixing my tv. It's the above model, assembled Oct 2010.
The problem started with the typical no picture and clicking noise coming from the set. I changed the y-sus and buffer boards and that didn't fix it so then I replaced the x-main. After that, I had a picture again.
The instructions with the board said to update the firmware after replacing the x-main board so I did that even though it said I was updating to the same firmware already on the set. It told me the update failed and I thought that made since and didn't think anything of it. I put the back cover back on the set and put it back on the entertainment center after that and after that it wouldn't turn on again.
So I was left wondering if I bricked something on the logic board with the firmware update? Or did I somehow short something when I was putting the cover back on? Did plugging a HDMI cable in mess up something on the main board? Did the x-main crap out again after one power-cycle and if so, why?
I've done more testing since then and I think I've only made things worse at this point, but here's what it does now:
With all the cables plugged in--You hear the relays click a couple of times and the power supply shuts down before the VS and VA can hit their normal levels.
With x-main unplugged--Relay clicks once and the VS and VA peg their normal levels but then the power supply goes into shutdown mode.
With y-sus disconnected--same as above
With the y-sus connected you can see a bit of static appear on the screen for about a second once you hit the power button. The voltages from the output of the y-sus to the x-main match what is printed next to the connector, so do I just assume the x-main board is bad again? Are there any other tests I should do before I replace it again to make sure I don't burn it out if that's what happened?
I never get the startup chime anymore either, fwiw.
If you need pictures the 6th post in this thread matches my Tv: https://www.badcaps.net/forum/showthread.php?t=34043
If you need more, let me know.
The problem started with the typical no picture and clicking noise coming from the set. I changed the y-sus and buffer boards and that didn't fix it so then I replaced the x-main. After that, I had a picture again.
The instructions with the board said to update the firmware after replacing the x-main board so I did that even though it said I was updating to the same firmware already on the set. It told me the update failed and I thought that made since and didn't think anything of it. I put the back cover back on the set and put it back on the entertainment center after that and after that it wouldn't turn on again.
So I was left wondering if I bricked something on the logic board with the firmware update? Or did I somehow short something when I was putting the cover back on? Did plugging a HDMI cable in mess up something on the main board? Did the x-main crap out again after one power-cycle and if so, why?
I've done more testing since then and I think I've only made things worse at this point, but here's what it does now:
With all the cables plugged in--You hear the relays click a couple of times and the power supply shuts down before the VS and VA can hit their normal levels.
With x-main unplugged--Relay clicks once and the VS and VA peg their normal levels but then the power supply goes into shutdown mode.
With y-sus disconnected--same as above
With the y-sus connected you can see a bit of static appear on the screen for about a second once you hit the power button. The voltages from the output of the y-sus to the x-main match what is printed next to the connector, so do I just assume the x-main board is bad again? Are there any other tests I should do before I replace it again to make sure I don't burn it out if that's what happened?
I never get the startup chime anymore either, fwiw.
If you need pictures the 6th post in this thread matches my Tv: https://www.badcaps.net/forum/showthread.php?t=34043
If you need more, let me know.
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