I have come into a LG 60PZ550 and am trying to fix the problem. I have done the pattern test with no results and am needing further advice. Please advise as I am quite at a stand still.
Thanks.
Thanks.
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Re: LG 60PZ550: Sound, No Picture
Posting Clear pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem -
Re: LG 60PZ550: Sound, No Picture
Have you tested VA/VS/VSC voltage test points ?Comment
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Re: LG 60PZ550: Sound, No Picture
Here is what I have done thus far.
1)Co-worker said plasma had blue/pink spot in certain areas of screen.
2)Confirmed screen issue
3)Research lead me to the multiple threads about the cracked joints on the inductors.
4) Pulled ZSUS and YSUS out and indeed had cracked joints.
5)Resolder all cracked joints. Resoldered all joints that appeared dull, disturbed,cold, etc...
6)Reinstalled boards, but TV would come on for a second then shut off. I could hear the relay switching on and off on the supply board.
7)Tried TV with only ZSUS board connected. TV came on but no picture. Measured voltages off supply board to ZSUS. Nominal.
8)Tried TV with YSUS board. TV would come on then shut off.
9)Measured voltage to YSUS from supply board with YSUS board removed. Nominal.
10)Used both DMM and Scope to see if I could observe a transient voltage off the supply board with the YSUS board connected. None.
11) Suspected YSUS has shorts. Found several IGBJTs with shorted leads.
12)TV was time sensitive to owner, so he opted to buy new YSUS board.
13)Installed new YSUS board and TV now comes on and stays on. Sound is present, but no picture.Comment
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Re: LG 60PZ550: Sound, No Picture
Disregard previous message. VSC and VY are not nominal as seen below.
Ok so I have measured the voltages and here is what I got
VS 199V
VA 53V
VSC 1KV+
VY 1KV+
VZB 108VLast edited by SCCrepairstu; 09-28-2016, 01:38 PM.Comment
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Re: LG 60PZ550: Sound, No Picture
have you also tested the buffer board for shorts ?Comment
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Re: LG 60PZ550: Sound, No Picture
Does the control board have a green blinking led when turned on?Comment
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Hi, I have a Samsung UE50TU with:
- sound and backlight, but no picture
- when it arrived, it had a picture for a few seconds
- it keeps rebooting
- without ribbon cable between the two panel boards, it does not reboot but I have no picture
- without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
- when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.
- without cable between mainboard and lcd panel and with a jumpered... -
I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly ‘new' Tcon board this time, and... -
Hello everyone,
Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
The previous owner stated that there had been white dots on the screen which from the description sounded like some lenses fell of the backlight LEDs.
He had opened the TV from the back, trying to get to the backlight, supposedly gave up, reassebled everything and gave the TV to me.
I expected the worst like ripped COF cables or a cracked panel but could not find anything like that yet.
Anyway I still fully expect that there has been something seriously damaged... -
Hi all
I was just given a Samsung TV with the issue. I read various threads and videos and attempted the ribbon tape method to gain an image, but no luck.
Symptom:
No picture no sound.
When I plug in the power cord, Backlight LED turns on for a half second and then turns off. The red LED next to the power button located center bottom flashes 2 or 3 times. When the power button is pressed after, it does the same thing.
No sound at all.
What I tried:
1. I tried unplugging the left or right ribbon... -
so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!!
what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing...
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