Re: LG 42" Plasma 42PJ560R - no picture
Control board LED.
Control board LED.
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Re: LG 42" Plasma 42PJ560R - no picture
you have bad caps, take soldering iron if you have one and heat caps one by one, starting with 4 big caps on the middle board near to the heat sink with 8 transistors, see if tv lights up. heat caps until u almost cant put your finger on them, place the tip of soldering iron on the top metal part of the cap, ofcourse.Comment
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Re: LG 42" Plasma 42PJ560R - no picture
it is unlikely the OP has bad capacitors, but a safer test (soldering iron may boil capacitor electrolyte) is to use a hairdryer, but I believe they tried this already.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: LG 42" Plasma 42PJ560R - no picture
hairdryer blows hot air all over the board, soldering iron heats up a specific spot, it will boil if you keep the iron for too long, logicaly, my father is an electrotehnician for over 30 years, me too with him... plasma tv starts working normaly after 30 min (?), that is a bad cap, its capacity slightly increases with temperature, after some HAPPY HOUR time of about 15 to 20 days that cap drys out or blows. my guess thats one or few of the caps closest to the heatsink.Comment
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Re: LG 42" Plasma 42PJ560R - no picture
Well, it is worth a shot, but these models aren't well known for bad capacitors. And out of probably 10 intermittent start issues, I've had maybe 2 sets with bad capacitors. Other intermittent issues can be the lead-free solder on the processors, loose connectors, cracked solder joints, intermittent MLCC... among others.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: LG 42" Plasma 42PJ560R - no picture
i agree but problems like what you listed arent common, samsung, LG, asus, all of them are same inside, same chinese shizz... caps, CCFL, inverter, mosfet are 4 most common parts that die in ANY today lcd, plasma, led screen... since plasma is 42" its really big, has more ccfl's draws way more juice, parts heat up faster, last shorter, especially caps, capxcon being one of the shizziest caps ever...Comment
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Re: LG 42" Plasma 42PJ560R - no picture
i used to use Nichicon caps but then customers stoped bringing their lcds for repair
however i never fixed lcd over 24", never had a chance, but this sounds like an average day caps problem ... IF the plasma stays ON after ~30 min of warming up.
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Re: LG 42" Plasma 42PJ560R - no picture
A plasma does not use CCFL tubes. It uses entirely different technology.
It still uses a lot of power, but the power is mainly on Vs and Va at high voltages, minimising ripple current, unlike 24V/13V in LCD.
This LG uses mostly Samyoung caps. Samyoung are "OK" caps. They rarely go bad. There are a few Samwha, which are also "OK", nowadays... they used to be a lot poorer.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: LG 42" Plasma 42PJ560R - no picture
all the caps are Sanwha except one Samyoung
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Re: LG 42" Plasma 42PJ560R - no picture
They are probably fine. If you want to replace them afterwards, it may be a good idea to increase the longevity. I have only seen bad Samwha on older LG, this is a newer model which does not generally have issues with them.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42" Plasma 42PJ560R - no picture
The small transformer is making a faint hissing sound. I have to keep my ear about an inch from it to hear it.Attached FilesComment
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Re: LG 42" Plasma 42PJ560R - no picture
Is there a way to start the tv with the control and main board disconnected?Comment
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Re: LG 42" Plasma 42PJ560R - no picture
The 50PJ350 service manual says that, to to test the control board led, the STBY 5V from smps has to be jumped to pin 3 of IC231 of ctrl board. If the led is on, then the board is OK. But, the IC no. on my board is different - IC 121. If it's same, how to locate pin 3 ?Comment
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Re: LG 42" Plasma 42PJ560R - no picture
What happened? No replies.Comment
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Re: LG 42" Plasma 42PJ560R - no picture
Looks like your post got missed under the pile of threads, it happens. To turn on without main board you place a jumper 100 ohm resistor between 5V Standby and M_ON, and 5V Standby and RL_ON.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42" Plasma 42PJ560R - no picture
Thanks for coming back to me.
Now, regarding the jumper, I will have to use two 100 ohm resistors, right?. One between 5V stby and M_ON and the other between 5V stby and RL_ON (please see attached pic). Should this connector and all the other connectors be connected during the test? Also, what will happen after jumpering? Will the TV show any test patterns or normal display. Please explain the steps in detail, as I am afraid that if I do something wrong, I might blow something up.Attached FilesComment
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Re: LG 42" Plasma 42PJ560R - no picture
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Re: LG 42" Plasma 42PJ560R - no picture
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Re: LG 42" Plasma 42PJ560R - no picture
Thank you tw2005 for the service manual. This manual perfectly matches my TV. I had been searching for the correct manual but did not find a complete one.
Many thanks again for your effort.Comment
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hi guys, i need your help again...i have tcl u65x9006. while i was watching it become darker like when a movie ends, little by little the image disappear. now if i turn on i have back light on, after like 1 min i have also sound but no picuture. the back light is on i take off one at time the ldvs but nothing change always no picture. i tried to cover with a piece of paper the pin of ldvs i cover like 7 8 pins but nothing worked. the tv stay with no picture. there is a tcon board.i checked the voltage there on the fuse i have 11,8 volts. there is caps in shorts on the exit of the tcon i have... -
Saved this beast from the landfill this weekend.
Manfactured July 2013 in Mexico.
I love working on plasma TVs.
Its been a while but I was lucky enough to find 2 this week.
The TV powers on and stays on but no picture. Havent checked for sound yet.
No bulging caps although the insides are pretty dusty and the boards are discolored from many years of high heat.
Will start troubleshooting tonight.
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Yes it's a 17 year old Panasonic plasma!
I was watching TV when there was a huge lighting strike nearby my house that shook the house. When that happened, the picture on the TV froze and the TV wouldn't turn off except by pulling the power cable. Now if you plug in the TV, it seems to turn on (it makes the turn on "clikcs" it always does, the red power light comes on but there is no picture, although I can see the back light around the edges. And the TV doesn't respond to the power button on the remote to turn off, and doesn't respond to the manual power button on the front... -
I have a Samsung 60-inch plasma TV, model PN60E550D1FXZA with factory remote. When cold, the TV will turn on and operate normally. After operating for longer than 30-60 minutes, if the set is turned OFF and then back ON, it will turn back ON, but there is no picture (screen remains black). I can confirm set is ON because I can hear audio from the speakers when I operate the VOLUME UP/DOWN control on the remote. If I allow the TV to rest (cool), it will eventually turn back ON with picture restored. That may take an hour or overnight.
I have removed the back of the TV and looked...12-21-2021, 02:40 PM -
Picked up a bahemoth plasma TV not too long ago and just now getting around to looking at it.
No picture but you hear the TV static (white noise) playing loud and clear.
The back was already taken off (and no screws were provided) as the previous owner had already taken a look.
But it seems they didn't get too far and just left it.
When I first took a look I was amazed at how pristine the inside looked.
Its as if the TV had been in a time capsule.
Caps looked like they were just pulled off the self.
Copper coils had no sign of corrosion on...
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