Hi,
I hope I can get some suggestions on what to look for before attempting to dismantle my monitor.
I have the above model, manufactured in 2016 that has developed an annoying problem, every 4 seconds I get a row of horizontal thin lines connected by 3 vertical evenly spaced lines across the bottom 2 cm of the screen. It actually looks like an image of a ribbon cable. They stay on for 4 seconds and then disappear again, and it just cycles through this all the time.
I've disconnected the inputs and tried it with another power supply (I have 2 of these monitors) but...
ODDS
Member
Last Activity: 10-30-2019, 01:40 AM
Joined: 02-02-2015
Location: Ashton under Lyne
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Acer R241Y LED Monitor Horizontal lines
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Re: LG32LB561V Black Screen with sound
If that's the case I think I'll pass it back to the owner, as this was only supposed to be a quick look as a favour and see if there is anything easy to fix. I'd rather not cause more damage to the set.
Thanks for the help though it was really appreciated.... -
Re: LG32LB561V Black Screen with sound
Thanks for that, just on a side note, is this an expensive/tricky fix. As it isn't my set is the cost of repair worth the hassle ?
You haven't added the link
Thanks for the help....Leave a comment:
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Re: LG32LB561V Black Screen with sound
Ooops, too late. But all connected back up as it was
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Re: LG32LB561V Black Screen with sound
Fathomed it out and added the picture to previous post....Leave a comment:
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Re: LG32LB561V Black Screen with sound
Just hooked t up to the Sky box and could just make out the Pause symbol in the bottom left corner, couldn't really see much else....Leave a comment:
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Re: LG32LB561V Black Screen with sound
New set of pictures of PCBs, I can't work out how to get the metal bracket seperated from the T-Con board. Do they solder them to the PCB, there appears to be 2 contact points connecting the metal shield to the PCB.
A little more info that might help. When the set is powered up, the red standby button comes on, when a channel is selected this slowly flashes red and then goes off. This is with no input connected though as I can't hook it up to anything at the moment.
Have now added the T-Con board picture...Last edited by ODDS; 06-23-2016, 03:01 PM.Leave a comment:
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Re: LG32LB561V Black Screen with sound
The screen is completely black, no flicker or anything.
Thanks....Leave a comment:
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Re: LG32LB561V Black Screen with sound
Thanks for the rapid response, I'll upload them shortly.
Thanks...Leave a comment:
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LG32LB561V Black Screen with sound
Hi,
My mate has asked me to look at this for him as he has some daft notion that I actually know what I'm doing. So to help me impress him I thought I'd turn to you guys
So the problem is the display is completely black, but the TV is switching channels as you can hear the audio of the different programs.
Below are pictures of the 2 PCBs inside the set, the T-Con board is covered by a plate, which it seems to be attached to somehow.
Any help appreciated.... -
Re: Samsung UH55H6400AKXXU Display Problem
Hi tom,
The voltages on the T-Con were the same when it was disconnected from the panel as they were when connected.
Given the purchase date that was in the Service menu (31/12/2014) it looks like a factory fault, and it was probably returned by the original purchaser.
Really pleased considering I picked it up for about 50% of the retail cost and it was only a few weeks old.
Thanks once again for your input....Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
Well well well, after checking all the voltages I adjusted those two 'rogue' values in the service menu and guess what ..... no more yellow bits on the screen. I just wish I knew what the true values should be, I just took them both up to 500 as a trial for now, so it will just take a bit of tweaking now
In the picture below previously it would have had a load of yellow in it now we have white snow instead.
Thanks everyone that took the time to offer advice and suggestions, I guess I just got lucky having a nosey in the...Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
Hi tom,
Right then, I have checked all the voltages with the panel disconnected from the T-Con board by removing the two LVDS cables. I've compared them to the original readings and there is no change, all voltages match up to the previous readings.
Would the display of good test patterns not discount a faulty panel also ?
I haven't tried adjusting those figures yet in the service menu but Is there anything else I could check whilst I have the back off the set. I see a lot of test points on the main board feeding...Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
Hi tom,
Sorry for not getting these readings yet, just not had the time but should have them this morning.
In the meantime I have been looking through the service menu and noticed something which I think looks strange. Having said that I'm a complete novice so haven't a clue if it's right or not.
In the ADC/WB (meaning ?) Menu under MGA (meaning ?) there are a lot of figures, all the figures are in the high 400's to low 500's except for the two in the second column, which are B7_Gain...Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
I'll get on to that tomorrow morning. So that would be the two connectors on the pic here. They connect to 2 smaller boards which are hidden under some black masking, which I presume has something to do with the lighting.
The annoying thing is, this problem only appears in brightly lit scenes. Tried all the usual adjustments and just can't get rid of it.
Thanks for the suggestions, really appreciate it.
Pete....Last edited by ODDS; 02-19-2015, 04:40 PM.Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
Hi,
Can't find an option to delete a message, so ignore this.
Thanks.Last edited by ODDS; 02-17-2015, 11:50 AM.Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
It is the correct description, so I wouldn't think of doing that to be honest.
I'm not bothered about throwing £20 at it to eliminate a problem, and it is an exact match to the board I have.
What I was looking for was advice to sort the problem, not a way to get my money back from a reliable seller
Thanks....Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
Hi,
Just a quick update on this display problem.
Replacement T-Con arrived this morning, so I checked all the voltages before removing the old one and then replaced it, unfortunately the problem is still there. I checked the voltages with the replacement board in place and they were the same as the original.
So unless I have been unfortunate and have two boards with the same issue then the problem lies elsewhere.
Would anyone like to chip in with any suggestions as I haven't got a clue what I am looking...Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
I double checked them all, but when I wrote them down in order even I started to have doubts, I have ordered the other T-Con , for £20 it's worth the risk to be honest. Should be here Friday, so we will soon see.
Thanks to everyone so far and I will keep you updated on the issue.
Pete....Leave a comment:
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Re: Samsung UH55H6400AKXXU Display Problem
Hi,
As expected, Samsung want Proof of Purchase so that is a dead end option.
So I have managed to take some readings from the T-Con board for some advice, despite the missus tutting and shaking her head
I have located an exact replacement, all numbers match, I have checked and double checked. Is it worth throwing £20 at it to rule the T-Con out ?
Here's the readings I took and the points are shown it the pic attached.
VGA1 - 13.66 VGB1 - 13.40
VGA2 - 13.12 VGB2 - 11.53...Leave a comment:
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