Re: LG 50PA5500 plasma won't turn on
Hmmm, thanks for the feedback. I'll check the y-sus in the next few days, that is the one board I haven't taken off yet. I kind of suspect it is the Y-sus because it makes a little bit of noise. So I would check the VS on the Y-sus and Z-sus with the power running correct? And what exactly is meant by 'check the pins of the connectors with the heavy cables going to for shorts to chassis/deck'? As in, from the cables?
Sorry, I obviously have no idea what I'm doing. Thanks for the help Badcaps!...
easternversant
New Member
Last Activity: 02-10-2016, 03:38 PM
Joined: 12-22-2015
Location: Greenville
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Re: LG 50PA5500 plasma won't turn on
Another update. I found a few things while testing various items on the power supply with the diode mode of my multimeter. A few things seemed not to work, but the most disturbing is that I got beeping from the multimeter in both directions when I tested both of these resistor boards (bottom left of the board).
[URL=http://s1336.photobucket.com/user/easternversant/media/20160106_210259_zpsikpharoo.jpg.html][/URL]
I assume that at the very least these will need to be replaced, is that correct?
Thanks.Re: LG...Leave a comment:
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Re: LG 50PA5500 plasma won't turn on
Good call, here are some pictures. Thanks in advance to anyone willing to play electronic "Good Samaritan."
The full back (with the zsus removed from the right side)
[URL=http://s1336.photobucket.com/user/easternversant/media/20160106_193649_zpsgrszfovr.jpg.html][/URL]
Power supply
[URL=http://s1336.photobucket.com/user/easternversant/media/20160106_193700_zpsoseemwvf.jpg.html][/URL]
And the z-sus. I've been testing it this evening with a voltmeter, and I haven't been...Last edited by easternversant; 01-06-2016, 07:28 PM.Leave a comment:
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Re: LG 50PA5500 plasma won't turn on
OK, I have an update on this. I've now tried testing VA and VS without any boards attached (because I read something about that today). The VA reading is about right at 54.6 (55 expected), but the VS reading = 0. I assume that means a faulty supply board?Leave a comment:
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Re: LG 50PA5500 plasma won't turn on
Thanks! I have that board out now and I'm trying to test those now. I've noticed a lot of them (those attached to the heat sink) have one of the 3 prongs that doesn't indicate flow while going from the middle prong to the opposite indicates it works using my multimeter in diode testing mode. However, those are all circled on the underside of the board by the manufacturer, so I assume this is normal.
Am I on the wrong track with this testing transistors on the x-sus? Should I be checking fuses/diodes now?...Leave a comment:
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LG 50PA5500 plasma won't turn on
Hi all,
This is my first foray into electrical repairs (other than some basic fixes to computers), so I'm looking for some input.
I have an LG 50PA5500 plasma television, as you know from the title. It apparently made a loud popping noise 2 months ago while I was gone, and now it won't turn on. The red indicator led is on if the tv is plugged in, but the tv won't actually turn on. When I attempt to turn it on this is what happens:
1. Indicator LED is on prior to to pressing power then...
2. Indicator LED turns off and there is an accompanying... -
Re: LG Plasma 50PA5500
Also, I know that this is a bit of thread necromancy...Leave a comment:
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Re: LG Plasma 50PA5500
Quick question: Should we be testing the VA and VS with the resistor jumpers in place when we remove the boards? I get basically no reading with everything attached. However, when I disconnect the z-sus from the power supply or disconnect the Y-sus from the z-sus I get about the right numbers if I [I]immediately[/I] test, but I can watch the values rapidly diminishing. Tests are with a digital voltmeter at 200V.
Any ideas anyone? Power supply?Re: LG Plasma 50PA5500
Quick question: Should we be...Leave a comment:
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