iFixit - Answers With Device "Samsung Display"

Samsung Display: Samsung Ultrawide monitor LC49HG90 - Is it a T-Con problem?

Tue, 03 Mar 2026 07:34:33 -0700

Bad picture after turning on while 5-30 minutes. After that it goes well. This "warmup time" is longer and longer.

Here are all of the pics: https://photos.app.goo.gl/gDMsz4suDAaQmz...

Thanks!

⟐ Commented March 03, 2026 at 7:34 MST

Samsung Display: S34J55x left half's bottom light doesn't turn on occasionally

Mon, 05 Jan 2026 12:13:32 -0700

This is a weird one - Bought this S34J55x monitor during covid, and for some reason it started developing this issue where when it wakes up, the left half of screen doesn't turn on bottom light. The right half is fine. Pixels are fine though. using joystick to turn off/turn on fixes the issue most of the time(not 100%).

This has happened both for PC(hp laptop through HP USBC dock to DisplayPort) and Mac(M4Pro MBP through a Tripp-lite dock to HDMI1).

It feels like a software/firmware issue, but I can't find any firmware updates(if they exist, Samsung's support website is...meh).

Anyone have experience/insight?

⟐ Commented January 05, 2026 at 12:13 MST

LS27DG602SNXZA: Jog Button/Joystick crumbled due to poor manufacturing.

Tue, 16 Dec 2025 18:05:28 -0700

I need help finding a replacement for this item. Samsung basically told me to kick rocks. PLEEASE HEELLLLP

⟐ Commented December 16, 2025 at 18:05 MST

Samsung Display: Is there any way to repair this matrix? Samsung LH55EDD

Sat, 15 Nov 2025 15:06:38 -0700

The display panel displays horizontal lines. After disconnecting one part of the panel, half of it works perfectly, while the other half works terribly. I also tried covering the pins with flex tape, but the best results were still very poor. Is there anything else I can do about this?

⟐ Answer accepted November 15, 2025 at 15:06 MST

Samsung 20 inch monitor S20B300B: How to fix Screen blacks out gradually after turning on

Mon, 11 Aug 2025 05:56:08 -0700

After turning on the pc after a long time the monitor works well but after abt 15mins the monitor completely blacks out. And i need to turn it off wait another loong while for it to become normal again....

Samsung U28E510: Guide to remove front panel layer

Sat, 09 Aug 2025 11:30:42 -0700

I have a bug that crawled behind the lcd front panel layer and died. Is there a guide on how to remove the front panel layer to dislodge the bug?

⟐ Answered August 09, 2025 at 11:30 MST

Samsung 20 inch monitor S20B300B: What to do if display gets damaged after cleaning with chemical?

Fri, 01 Aug 2025 19:41:01 -0700

Yesterday I was cleaning my monitor with Colin (cleaning agent). I directly sprayed it on display and wiped it with a dry cloth. After cleaning, I thought to turn on my PC and check for the display but it worked fine. Today when I turn it on my PC I saw that there were some blue lines in the middle of the display. What should I do now? Please assist me

⟐ Commented August 01, 2025 at 19:41 MST

Samsung Display SE790C Series S34E790C: High Pitched noise from this Display – Is there a way to fix it?

Thu, 26 Jun 2025 23:23:46 -0700

I’ve had this display (Samsung 34” Wide screen) for 3 years, and now it has started to emit a high pitched noise. It’s so uncomfortable that I can’t work properly. I also have tinitus, which makes it worse… :(

Can someone please advise me what to do? Googling about this, high pitched noises are common for monitors (I also had it on an older display, but it vanished when I set the brightness on max). One solution is to apply a lot of glue on some of the components on the motherboard.

My question is: Where on the motherboard should I apply this?

It’s probably easy to open the monitor, even though I can’t find any guides on the net…

PLEASE HELP – My brain is about to explode! :((

⟐ Commented June 26, 2025 at 23:23 MST

Samsung Display: Samsung Monitor C24F392FHN display not staying on

Sat, 24 May 2025 08:44:16 -0700

My monitor flashes on and off with a buzzing noise after it's turned on then stays black. What could it be?

⟐ Commented May 24, 2025 at 8:44 MST

Samsung Display SE790C Series S34E790C: The monitor no longer turns on

Tue, 15 Apr 2025 18:01:01 -0700

A few months ago, my monitor would turn off randomly. I would simply replug the power cable from the outlet and the screen would turn on after a few seconds. Over the months, the screen would turn off more frequently and plugging and unplugging them monitor wouldn’t always work. I even connected the monitor to a seperate switch board that I could turn on and off with my foot to make the prcoess much quicker. Some days it would take longer and longer to power on but after power resetting it enough times it would stay on for prolonged periods. Now, my monitor won’t turn on.

I’m worried that the constant disconnecting from power may have fried something in the monitor but i’ve ordered a new power supply and cables to see if that’s the problem.

There are no Samsung repair stores in my state and there aren’t any monitor specific repair stores here either. If anyone has had similar experiences with any monitors or even other electronic appliances, i’m willing to try anything at this point.

Thank you!

⟐ Commented April 15, 2025 at 18:01 MST

Samsung Display: Monitor flashes then goes black when unused for a few days

Mon, 14 Apr 2025 12:07:19 -0700

10 second YouTube video here of issue : https://youtu.be/2G9xI4P-CCU.

When unused for few days, monitor flashes brightly then goes black. Passing heat over display (eg. using hair dryer) fixes but it's getting worse. I need to keep hair dryer on monitor for longer to get it working again. Once working, it displays fine once I don't stop use again for extended period.

Samsung tech repair center can't confirm cost due to uncertainty of which part needs replacing. What part could it be and how certain is this? Also, can I repair on my own? I am not an electrician but can screw in a light bulb, use a screwdriver and other handy things :)

Model number : LC27G75TQSUXEN

S/N : CX60H4ZN600665B

Model : C27G75TQSU

Type No : C27G75TQS

⟐ Answer edited April 14, 2025 at 12:07 MST

Samsung Display: Thick Vertical Black Line on Samsung Odyssey G6

Thu, 27 Feb 2025 07:17:44 -0700

Im buying an item off of someone and they have this going on, on their monitor. Is this a a loose tab connection on the display panel itself that can be fixed easily?

⟐ Edited February 27, 2025 at 7:17 MST

Samsung SyncMaster 2333HD: How to remove oil in my display

Mon, 24 Feb 2025 01:46:55 -0700

how can i remove spilled oil that has entered my screen in the inside creating a dark part

⟐ Answered February 24, 2025 at 1:46 MST

Samsung LS32D85KTSR: Screen flickering & horizontal lines at the bottom and top

Mon, 17 Feb 2025 19:56:15 -0700

Recently, my computer screen has been experiencing occasional flickering and permanent horizontal lines at the top and bottom. Despite my efforts to resolve the issue by replacing the HDMI cable, trying different ports, and reinstalling graphics and monitor drivers, the problem persists. I suspect a hardware issue but lack the expertise to diagnose it. Therefore, I would greatly appreciate any assistance in identifying and resolving the issue.

⟐ Answered February 17, 2025 at 19:56 MST

Samsung Display: White screen on a Samsung Syncmaster 950NW

Sun, 03 Nov 2024 14:23:03 -0700

Hello,

Sycmaster 940NW is recognised by laptops (even passes its serial number via VGA), but the display is completely white and OSD does not appear.

I have replaced a fuse and a diode bridge on the internal PSU (before that, the screen did not even switch on).

How do I troubleshoot further?

Thanks,

Vincent

⟐ Commented November 03, 2024 at 14:23 MST

Samsung Display: Tiny Red dots on my display

Mon, 21 Oct 2024 10:24:44 -0700

Hello,

I have a U32H850 Samsung 4K monitor and suddenly red dots are showing up all over the place. I took the case off and reseated all but one cable (was worried I might damage it) with no luck. Can anyone guide me on what part may have failed that is causing this so I can order a replacement?

⟐ Commented October 21, 2024 at 10:24 MST

Samsung SyncMaster 2494HM: Full off black screen

Tue, 24 Sep 2024 12:05:38 -0700

Full black screen

Samsung M70A LS32AM700UUXEN Smart Monitor: How to fix strange vertical scan lines on my Samsung M7 smart monitor

Wed, 24 Jul 2024 11:48:21 -0700

Hi,

This is my first post on this forum.
Recently, I have experienced an issue on my Samsung M7 smart monitor where strange vertical lines have appeared (See attached images).

I have no idea as to what could have happened to cause this problem.

Firstly, it does not appear to be a problem with any inputs (i.e., HDMI inputs) as the issue seems to be native to the screen itself.
I have tried unplugging all HDMI connections to the monitor, as well as leaving the monitor unplugged for a long period of time before powering it on again.

I have also tried resetting all settings on the device to no avail. The built-in trouble-shooter simply recommends to speak to Samsung about repairs. However, I would much prefer to resolve this issue myself (if possible) before I resort to the Samsung repair route.

If anyone has advice, fixes, or any suggestions it would be greatly appreciated.

Thanks,
Gman_Origin

⟐ Edited by author July 24, 2024 at 11:48 MST

Samsung Display: Monitor turns black after a few minutes

Tue, 25 Jun 2024 02:23:01 -0700

This Samsung Syncmaster 940NW monitor works fine except for the fact that it turns black after a few minutes. A few minutes means: 5, 10, 15, 20 or whatever minutes it likes to stay on. What could be the cause for this blackout?

⟐ Answered June 25, 2024 at 2:23 MST

Samsung 20 inch monitor S20B300B: Why my dvd speaker is not connecting?

Mon, 10 Jun 2024 08:17:00 -0700

Audio cable is connected yet monitor is not connected with tha dvd spe

⟐ Answer edited June 10, 2024 at 8:17 MST