The correct LG model is 20MP48AB (2017).

A few days back, a vertical line started blinking every 7 seconds, disappearing within 2 seconds.

Please help

⟐ Answer accepted Şubat 12, 2024 at 8:15 GMT-7

Well, my throwaway display developed 5 lines in storage. It's being used with the Mac Mini 2012, but these lines developed in storage.

Any way to minimize the visibility of these lines, or is the display toast?

⟐ Answer accepted Şubat 03, 2024 at 23:31 GMT-7

⟐ Commented Kasım 26, 2023 at 14:06 GMT-7

I built a new frame for an ASUS Monitor 27”, removed the backlight in order to use the screen transparent with natural light, as done on this video https://youtu.be/Shp5JhOqdKI https://youtu.be/Shp5JhOqdKI I was extremely careful with the electronic components but the screen soon started to flicker and bands went horizontally, it came back and worked for a while but now won’t even power up. Can someone please help me to know how to go about this without damaging the device? Thank you very much, Nick

I covered the top of the electronics with steel sheeting instead of the usual aluminum and tested the monitor with shining a power bank with a flashlight built in it and don’t know if this would have or something else interferes with the electronic components.

Here are both sides of the two circuit boards aside from the LCD and both sides of the LCD circuit board.

In case interference is the problem, I opened a different LCD display and all of the circuit boards including to the circuit board attached to the LCD glass were on both sides shielded by aluminum sheet and foil tape.

Here are the images of they upload of a different monitor Asus VZ27E; it was a lot easier to reframe without a backlight.

⟐ Commented Ağustos 10, 2023 at 19:03 GMT-7

how do i repair & replacement plz help me

⟐ Answered Haziran 05, 2022 at 18:16 GMT-7

⟐ Answered Mayıs 02, 2022 at 20:00 GMT-7

⟐ Comment deleted Ekim 03, 2021 at 9:18 GMT-7

What is the problem with the monitor?

⟐ Answer accepted Temmuz 31, 2018 at 23:49 GMT-7

⟐ Answer edited Şubat 13, 2018 at 20:13 GMT-7

Samsung SyncMaster 225BW

If I turn on, I must wait 10 minutes if they start.

I think something wrong with capacitors.

Do you know how can I repair it?

Thank you very much for answers.

⟐ Answered Ağustos 14, 2014 at 3:56 GMT-7

-asked when demoing Answers at Maker Faire!

⟐ Edited Mayıs 24, 2013 at 10:36 GMT-7

⟐ Answer unaccepted Aralık 02, 2024 at 22:02 GMT-7

I lowered it from 100 to 65% and it indeed helped, but after a couple of months the issue returned... I continued to lower the brightness, but it helped only for a couple of hours at most, then I needed to lower it further... Turning the monitor off and waiting for it to cool down also helped for a short time, after which it continued to black out every 10-30 sec... I decided to take the monitor apart and look at the power board, and indeed saw 3 bulged capacitors.

I bought new replacement caps and went to a professional (soldering is not among my skills), and he replaced all the caps on the power board except the biggest one for high voltage, since it seemed fine and rarely goes bad according to my research. But he mesured it's capacitance and saw it was 120 uF instead of 150, but I decided to see if replacing every other caps fixed the issue (I also didn't have the replacement for the big cap)...

Unfortunately it did not, the monitor continued to black out periodically, I continued to lower the brightness for several hours untill I hit the bottom and at the end the monitor started to fade frantically and after a short time blacked out for good...

I replaced the last capacitor on the power board (150 uF 450 V), but it didn't help, my monitor now is permanently black and doesn't turn on at all (the indicator light turnes white and then red after a minute). And I can see the image on the screen with a flashlight, so it is a backlight issue.

I measured the output voltages from the PSU board to the backlight on CN801 connector (see my 2nd picture below). It's 29.3 V on contacts 3 and 4 (red wires), the rest are 0.

• I get the same voltages readings with the power cable plugged in, regardless of whether the backlight is connected to the PSU or not, and whether I turn the monitor on or off with the button (it just drops from 29.3 to 29.2 V when I turn it off).

Someone who took apart the same monitor mentioned on another forum that each wire goes to a pair of LED strips with 10 LEDs on each strip, and the voltage he measured was about 60 V. Those findings correspond to the reference data I received from BenQ tech support. Apparently the voltages I get are half of the nominal...

Does this mean that my power board is faulty? If it is, how can I pinpoint the faulty component on the board? Or the problem is rather the backlight LED strips failure as many people clame? This is a great monitor I payed a lot of money for and I'd really like to fix it instead of throwing it away...

Thanks.

Connections:

From the buttons in the frame to the mother board:

From the mother board to the PSU board:

(also, see CN701 on the PSU board on the 3rd and 4th pics from the top)

From the PSU board to the display:

T-con board:

Reference data:

⟐ Commented Nisan 03, 2026 at 9:26 GMT-7

I've just imported my LG UM95-P from Amazon Spain it's a beautiful display but it has some minor but very distracting backlight bleed I have less than 30 days to decide if I want to keep it:

The picture bellow exaggerate the perceived backlight bleed under normal viewing conditions only the bottom left is visible and only when the screen is black:

On 100% Brightness see the distracting yellow bleed on the lower left hand corner.

As you can see on 0% Brightness there is hardly any back light bleed at all which rules out IPS glow .

Overall I'm very happy with my LG and by comparison to many LG UM95-P owners I have very little bleed but the effect when viewing a dark image a film or game (Amnesia: The Dark Descent) being a prime example is like the glow of a small campfire to the left of my peripheral vision which breaks the sense of immersion.

As these screens are well known for this issue a replacement is unlightly to solve the problem, I have attempted to fix the problem myself using Credit Card Light Bleed Fix as seen in this video:

Credit Card Light Bleed Fix

Although it did not fix the problem nether did it worsen it pushing at the bottom left of the screen temporarily removes the light bleed, I even went so far as to try a suction cup which yet again had no effect :(

My last attempt will be fit a folded piece of paper in gap between the screen and the panel as in the following video 1:00 in:

Backlight Bleed Fix

Thanks for reading any feedback would be greatly appreciated.

⟐ Answered Eylül 28, 2025 at 9:46 GMT-7

I’ve had the back off the panel again and it seems to have a small 3mm split in one of the lvds that connects it on the lcd panel at the bottom, could this be causing the issue?

like circled in the picture here.

⟐ Commented Ocak 05, 2024 at 13:17 GMT-7

Unplugged all leads and power to PC to get this going.

Don't know why this occurred.

Any ideas?

⟐ Answered Şubat 10, 2022 at 14:03 GMT-7

I have an Samsung SyncMaster EX2220 type monitor.

But one of my cable connection on the LCD screen get broken. I would like to buy an other cable, but I am not sure what the type is it or where can I buy?

Maybe a backlight cable?

6 pin cables.

I can read the next information on the cable:

Black outer protect part: 125°C vw-1 Sumitube Nhr4 diam.6mm

4 white cables: E4139 6 Awm vw_1 105°C

2 black cables: Lf Hf

Thank you.

Bye.

Samsung

⟐ Answered Ocak 24, 2021 at 5:06 GMT-7

My Dell E193FP Monitor goes black after about 1 second after I switch it on. This applies for when I use the "on" button, plug it into the PC, change screen resolution in display settings, etc. It always just shows a picture for 1 second and then goes completely black. The picture I see for 1 second is good and there seems to be no damages in the picture.

Now I'm thinking, if I can get a picture for 1 second, can the screen be repaired?

Cheers,

Christian

⟐ Commented Şubat 06, 2020 at 20:11 GMT-7

⟐ Answer edited Aralık 19, 2025 at 13:15 GMT-7

⟐ Answer accepted Mart 23, 2025 at 6:57 GMT-7