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Black Spot and Stripes on Monitor

luizcrf

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Joined
Apr 16, 2023
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Hello, when turning on my monitor, I came across this situation:
black patch at the bottom
vertical colored stripes
A lower right region with an intensely bright light spot.
The monitor has not been damaged in any way. I simply turned it off one day and when I turned it back on, it was like this.
I tried to clean the flat cable with an eraser and anti-seize, but without success. In fact, the situation got worse as more stripes appeared.

Any suggestion to solve this problem?
The computer in question is a Dell Optiplex 3030 A20 All In One.
The monitor has an LG Lm195wd1 display
The flat cable is cn-00Rt13 70163.
372410620_1360345371564235_4603980801548792837_n.jpg
 
i would unplug the cables, hdmi or display port and unplug the power cable for the monitor for 30mins...
then plug it all back in and see if the lines and black spots are still there
 
I would guess the controller is dead
 
Oohh, that looks like a dead monitor. I'd start looking for a new one. Or you need to start swapping parts, like joemama implies above
 
What controller? Do you mean graphics solution (typically a card or integrated)?

A full power reset suggested by Hyderz would be the first step - though leaving it unplugged from the wall for 1 minute is plenty long enough.

Other than that you need to isolate the problem to either the monitor or the computer. Since this is an AiO computer (essentially a laptop motherboard strapped to the back of a large desktop monitor) you will need to attach an external monitor and see if the problem appears there too.

I tried to clean the flat cable with an eraser and anti-seize
"Anti-seize?" I don't know what that is but putting some sort of lubricant, especially if petroleum based, on electrical contacts generally is a very bad idea.


Also note that cross or shotgun posting across multiple forums/sites at the same time is often considered poor forum etiquette. It can tie up valuable volunteer resources but can also cause confusion as users may get conflicting advice which can lead to helpers seeing replies reporting results that are unexpected.

Make sure you go back to every forum on every site you asked this question and post what you did to resolve your issue. Do not leave any threads "dangling".
 
I would guess the controller is dead
Got it, thanks...But what about the black spots on the bottom? they overlap the mouse cursor. It looks like a leak, but when pressing the screen, the stains don't move.

Try plugging another device to the monitor.
Hello friend, I'm thinking about it, but this computer is an All in One. The display is connected to the motherboard through a flat LVDS cable model cn-00Rt13 70163.
To test the screen on another computer, it would need to be compatible with this cable model, and I don't have it. The only computer I have is an Acer notebook model Aspire R11 - r3-131t-p7qw. The cable is much smaller and the input is not compatible.
I'm thinking of buying a Lvds>HDMI adapter.
In this way, I could connect the motherboard of my Dell computer to a notebook with an HDMI input.
Something like this model in the image below.
I think it would be better than buying a new display. But I'm still in doubt. Would this work?

Oohh, that looks like a dead monitor. I'd start looking for a new one. Or you need to start swapping parts, like joemama implies above
Got it. I'm still in doubt if it's the Cable Flat, the display or maybe this board that connects the Monitor.

What controller? Do you mean graphics solution (typically a card or integrated)?

A full power reset suggested by Hyderz would be the first step - though leaving it unplugged from the wall for 1 minute is plenty long enough.

Other than that you need to isolate the problem to either the monitor or the computer. Since this is an AiO computer (essentially a laptop motherboard strapped to the back of a large desktop monitor) you will need to attach an external monitor and see if the problem appears there too.

"Anti-seize?" I don't know what that is but putting some sort of lubricant, especially if petroleum based, on electrical contacts generally is a very bad idea.


Also note that cross or shotgun posting across multiple forums/sites at the same time is often considered poor forum etiquette. It can tie up valuable volunteer resources but can also cause confusion as users may get conflicting advice which can lead to helpers seeing replies reporting results that are unexpected.

Make sure you go back to every forum on every site you asked this question and post what you did to resolve your issue. Do not leave any threads "dangling".
Hello friend, I will test the Hyderz solution and post it here.
As for testing the display and board on other devices,
As I explained, the cable that connects the motherboard to the display is a Lvds model cn-00Rt13 70163. I would need another device compatible with this cable, but unfortunately I don't have it.
I'm thinking of buying a Lvds to Hdmi adapter (something like this: https://pt.aliexpress.com/item/32855989953.html.) and this way test the motherboard and another flat cable on a different monitor to find out where the problem.
As for posting in other forums, I apologize, I really didn't realize it could be offensive.

i would unplug the cables, hdmi or display port and unplug the power cable for the monitor for 30mins...
then plug it all back in and see if the lines and black spots are still there
Hello friend, thank you. I will test the solution and post it here if it works.
 

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As for testing the display and board on other devices,
As I explained, the cable that connects the motherboard to the display is a Lvds model cn-00Rt13 70163. I would need another device compatible with this cable, but unfortunately I don't have it.
No, you are confused. As seen here, you can add a second monitor by connecting it to the back of that AiO monitor. If you see the same garbage on the 2nd monitor, that tells you the computer's graphics solution is bad. If the second monitor looks correct, that tells you there is a problem with the AiO monitor.
 
No, you are confused. As seen here, you can add a second monitor by connecting it to the back of that AiO monitor. If you see the same garbage on the 2nd monitor, that tells you the computer's graphics solution is bad. If the second monitor looks correct, that tells you there is a problem with the AiO monitor.
Yes it's true. The second output is VGA, and it's working smoothly, no distortion on the screen.
 
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