First thing, I've read just about everything about this TV on this forum and it's infamous due to it's ZSUS failures and inability to find replacement for it.
Anyways I got this for $30. Been working on it off and on.
The issue is it will turn on, no video but I have sound.
I can hear buzzing in the back on nearly every board, and all heat syncs get warm.
I have tried doing the image test by jumping the points on the control board with and without LVDS cable plugged in, still couldn't get an image to come up.
I do have a blinking green light on the control board.
I don't even get a faint glow panel.
I've also tried unplugging zsus and the TV acts the same.
However unplugging the ysus results in booting off immediately after plugging power in.
All fuses check good.
I've made sure all ribbon cables are plugged in correctly and not crooked or broken.
I've test my VS, VA and 5v coming from PSU and the other end on both boards, and they test good according to the panel sticker.
So far I have sent the ZSUS off to mygoodiefinder in Paris TX to get fixed. He stated he did the following:
I took all boards off of the TV for inspection and the only thing that looks suspicious is the coils on the ysus, a joint look a little cracked. I'm going to fix that today and let you know how that ends up.
I also have the following manuals:
50pv450 Schematics and Exploded View
50PV450 Training Manual
60PZ550 Service Manual
I just need a little help. I have to be missing something simple. I'm sorry if I've left anything out, please let me know if I have.
Anyways I got this for $30. Been working on it off and on.
The issue is it will turn on, no video but I have sound.
I can hear buzzing in the back on nearly every board, and all heat syncs get warm.
I have tried doing the image test by jumping the points on the control board with and without LVDS cable plugged in, still couldn't get an image to come up.
I do have a blinking green light on the control board.
I don't even get a faint glow panel.
I've also tried unplugging zsus and the TV acts the same.
However unplugging the ysus results in booting off immediately after plugging power in.
All fuses check good.
I've made sure all ribbon cables are plugged in correctly and not crooked or broken.
I've test my VS, VA and 5v coming from PSU and the other end on both boards, and they test good according to the panel sticker.
So far I have sent the ZSUS off to mygoodiefinder in Paris TX to get fixed. He stated he did the following:
Visually it's hard to say, I would have changed the fuse and 6 PF4633 mosfets plus reworked the solder of the 3 large coils, which is the cause of these boards failing. There are 2 small 27 ohm surface mount 2 mm long resisters near each of the mosfets I change, they can be issue, you can look at them for obvious damage it's hard to see it sometimes so I check them with a meter before I put the mosfets in, maybe that is issue dunno maybe a weakened one let go or checked good and really wasn't, I try to be real fussy with them, usually 2 are bad and obvious ~ robert
I also have the following manuals:
50pv450 Schematics and Exploded View
50PV450 Training Manual
60PZ550 Service Manual
I just need a little help. I have to be missing something simple. I'm sorry if I've left anything out, please let me know if I have.
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