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Old 05-28-2022, 07:27 AM   #1
x2006nzl
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Default Lg 60PZ550 no picture

Hello I acquired a lg 60PZ550 no picture, but the backlight powers on , just no image, I read this can be the mainboard?
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Old 05-28-2022, 08:21 AM   #2
nomoresonys
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Default Re: Lg 60PZ550 no picture

could be a number of things, do you have a multimeter for testing?
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Old 05-28-2022, 08:24 AM   #3
nomoresonys
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Default Re: Lg 60PZ550 no picture

need pictures too, straight on clear pictures of each board and one of the whole back as to see how everything is connected.
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Old 05-28-2022, 08:27 AM   #4
nomoresonys
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Default Re: Lg 60PZ550 no picture

or you can do some guessing, my first guess would be maybe a tcon issue but it's just a guess without testing.
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Old 05-28-2022, 08:33 AM   #5
vinceroger69
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Default Re: Lg 60PZ550 no picture

Quote:
Originally Posted by nomoresonys View Post
or you can do some guessing, my first guess would be maybe a tcon issue but it's just a guess without testing.
Mainboard maybe as a plasma no tcon?
I would run the test patterns if you can
service manual https://www.manualslib.com/manual/12...g-60pz550.html
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Old 05-28-2022, 09:02 AM   #6
Biruslapio
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Default Re: Lg 60PZ550 no picture

Do the auto_gen test by removing the LVDS cable and shorting two pads on the logic board, the tv should start by showing test patterns, if the image is good and stable the fault lies on the main board, possibly BGA issues on the main chip under the heatsink, famous on all PX and PZ plasmas.

Following the standard on LG plasmas, I think it's those two pads since the service manual nor the board itself shows where they should be.
Attached Images
File Type: jpg 60pz.jpg (164.4 KB, 11 views)
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Old 05-28-2022, 10:50 AM   #7
nomoresonys
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Default Re: Lg 60PZ550 no picture

yep, my bad, didn't register the P for plasma.
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