Hi. I have a 50 inch LG plasma. No picture at startup, no sound. The controls go well, they are done with the remote control or on the front panel of the TV, they seem to go well. The power indicator lights up. The voltages indicated VA = 55V; Vs = 205V are present on the power supply unit and on Y-Sus. But the Control Card flashes short-short-long-short. What does this code mean?
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Re: LG 50PW451 black screen, no sound.
Run the test patterns. Post pictures of your tv boards and we can tell you how to do it. -
Re: LG 50PW451 black screen, no sound.
PictureAttached FilesComment
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Re: LG 50PW451 black screen, no sound.
To run the test patterns, unplug the connector circled in red. Take a piece of wire and put it in the logic board holes. Plug tv back in and look for colors on the screen.I think the holes are marked r51 and r52. Send a clear close up pic of the logic board for us to make sure.Comment
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Re: LG 50PW451 black screen, no sound.
I can't see the connector you talk about. Can you send me a photo?Comment
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Re: LG 50PW451 black screen, no sound.
Here you go.Attached FilesComment
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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... -
I have a 2019 75" x950g, and while playing a movie, the screen suddenly went dark in a weird way, where it faded towards one corner into being fully black. Now the TV turns on, and the backlight comes on, but there is nothing displayed except black. Sound still comes through the TV speakers, and i have tried doing a hard reset using the volume - and power buttons while plugging the display back in, but it did not fix it. I can confirm that pressing buttons on my remote is still doing "something" because I'm hearing sound still, even though the screen is black.
Does... -
Hello,
YouTube video of the problem encountered: https://youtube.com/shorts/q7TLNv36LUo
I am a pro and I have a problem that I have never seen despite my 7.5 years of experience on my own and my thousands of repairs, on a customer's Dell G3 15 3500.
On this PC I have already changed the complete palmrest because the keyboard was no longer working properly.
I also changed the screen because the PC fell and the screen was broken.
I changed the battery with a new and original battery.
I also had corrosion/oxidation on the... -
Good morning.
I have a problem with my LG Smart 43UF640V TV. It starts, the backlight comes on but nothing is displayed on the screen and there is no sound.
I thought it was a TCon problem and ran various tests. If I disconnect one or the other of the cables from the tcon to the panel then the screen is white on the side where the cable is disconnected and black on the other side. If the two cables are disconnected the screen is completely black.
In the 4 configurations I measure exactly the same voltages on the tcon card (model V15 43UHD TM120 Ver0.4) :
HVDD : 7,28... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
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