Re: Lg 50pk750
I broke down and just went ahead and ordered the board. I finally received it today and (cue the church choir) the tv is now working...
Thanks guys for your help!
humzilla
Member
Last Activity: 10-29-2015, 06:53 PM
Joined: 08-07-2015
Location: Minnetonka,MN
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Re: Lg 50pk750
My TV is a 50PK750-UA.AUSLLR. The boards I'm finding appear to be for 50PK750-UA.AUSLHR. I'm not sure what the difference is between these two models but am suspecting it has to do with the revisions made on this board.
I know I'm being a bit paranoid here, but you guys think that the different control boards are interchangeable?
I've already posted a picture of my board and the e-bay pictures are pretty blurry but everything is in the right place. The boards appear to be nearly identical except for the revision difference.
...Leave a comment:
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Re: Lg 50pk750
This board looks the similar but the part number on my board is P/N EAX61557902 (3). This board is P/N EAX61557905 (1). These sound like different revisions. Do you think the P/N EAX61557905 (1) would be a workable substitute?Leave a comment:
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Re: Lg 50pk750
Doing some searching on the web it looks like it's going to be pretty difficult to source the main av board.
Are there any usual suspects that I might be able to repair on this board or do you guys think I'm likely out of luck? Is it time to start shopping for a new tv?Leave a comment:
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Re: Lg 50pk750
I haven't tried the additional testing on the PSU board yet, but I did try to the jumper on on the control board (it was easier.)
The tv began go through a bunch of test patters... flashing the screen in different colors followed by displaying various boxes...
I'm guessing this means the PSU board is fine and that my problem is the main board. Do you guys agree?Leave a comment:
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Re: Lg 50pk750
Yep.... I was measuring in AC. In DC, I get the following measurements.
Va = 60V
Vs = 200VLeave a comment:
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Re: Lg 50pk750
Okay. Here are some pictures of the TV's innards....
Powering the tv back up this morning, I noticed that the display is not going completely blank. There is still some "backlight." I know a plasma doesn't have a backlight, but the screen is still glowing some. When I power down the tv, this goes away. I am still not able to see anything further displayed on the screen.
I also measured Va and Vs...
Va = 132Vac
Vs = 437Vac
I'm only measuring these with a multi-meter so I can't see if there...Leave a comment:
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Re: Lg 50pk750 - screen flashes and then goes dark
Does anybody have any ideas?
I have measured all of the voltages coming off of the power board that typically fails and they all appear to be fine.
Any suggestions on where to look? I'm hoping I can resurrect this wonderful plasma tv.Leave a comment:
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Lg 50pk750
My LG 50PK750 has been working great for 5 years.... Now I'm in withdrawal...
When I turn on the tv, the screen lights up and then goes dark. Using the remote or any of the controls on the tv cause the blue LED to blink like normal, but that's about it. I can turn the tv off and on but no video. I've pulled the power board and inspected the solder connections on the three power resistors. They didn't look great but measured 11 ohms as marked on the resistors. I re-soldered them just to make sure it wasn't a bad solder. Powering the tv back up, things are unchanged.
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Re: New Members - please post your introductions here
Hey just joined this website. Most of my background is in digging around the insides of integrated circuits (computer chips) but I can wield a soldering iron if I must.
I'm hoping you guys can help my out in my adventures with some cranky tvs.Leave a comment:
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