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

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

⟐ Edited February 27, 2025 at 7:17 MST

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

i have a Odyssey Neo G9, which is defective since quite some time. It does not turn on at all. The power LED blinks every 10sec or so very shortly.

I recently began to repair it. I have fixed one component on the mainboard, but sadly it does not seem to be the only broken component. I have circled the swapped component in the Picture. It was causing a short between 20V and GND. That short is now not present anymore.

However, the next problem is, that the "VDRV" Voltages are not supplied. The power supply defines them as 14.2V. When the mainboard is not connected, i measure 13V. When the mainboard is connected, i measure 0V. However, the pin for "BL On" measures 6V without mainboard, 0V with mainboard. I think this means the mainboard does not give the signal to turn on to the PSU, but ill gladly accept any other explanations for the behavior.

The "VDRV" pins are directly connected to the "VLED" pads near the backlight ribbon cables on the right side of the board. As implied, the backlight power is supplied through the same connector that supplies everything else to the mainboard and i can not test the backlight separate from the mainboard. This is most likely due to the mini LED technology used.

The Joystick for turning the monitor on is working as intended, and all signals get to the board, measured in the bottom left.

This leaves me clueless why the monitor wont turn on and i would appreciate any nudge in the right direction, or any direction for that matter.

Sadly i don't have an Oscilloscope and currently don't have the money to buy one.

Could i have broken something, causing this, by replacing the circled part?

Thank you for any help,

Mattis Brooker

⟐ Commented March 30, 2024 at 17:15 MST

The monitor's backlight keeps flashing on and off extremely fast, but there is data on the screen when connected to the pc while it's flashing, i disassembled the monitor and tested the voltages, the side that connects to the leds are fluctuating, so i removed the leds cable and the flashing and voltage fluctuation stops, i changed 4 capacitors on the board, the diode and mosfet connecting to the leds, but to no avail, and there are no shorts anywhere does this mean that the led strip is the problem?

⟐ Edited by author August 23, 2023 at 18:43 MST

Samsung Odyssey Neo G7

⟐ Edited August 17, 2023 at 3:27 MST

⟐ Commented May 12, 2022 at 14:06 MST

⟐ Commented November 26, 2021 at 7:04 MST

| Monitor | Connection | Recognized by Win10 _____ | Effect

| 1 _____ | DP → DVI _ | Yes _____________________ | Flicker or signal on/off for appx. 30–60 sec then black
| _______ | DP → DP __ | Mostly yes, sometimes not | Black from the beginning

| 2 _____ | DP → DVI _ | Yes _____________________ | OK for appx. 1 min then black; identical after every power off/on
| _______ | DP → DP __ | Yes _____________________ | the same as immediately above

When connected via DP and the signal goes on/off I here a switch clicking inside.

This happens with two different laptops with two different (Windows) OSs. I tried different DP → DP cables already (including a completely new not-so-cheap one from an electronics store). To no avail. I didn't try another DP → DVI cable, but that was intended to be just a workaround anyway.

Are there chances that this can be repaired with home tools (including multimeter for U, I, R and soldering iron)? But which part(s) to exchange to give it a try?

Early into its ownership, its USB passthrough randomly broke. As in, when I was adjusting the monitor's position, the middle portion of the type-B port fell out. ???? Never really got around to fixing it since it's fairly insignificant.

Now I want to fix it, especially now that I have the tools necessary to do such a thing.

Questions

Is there a more specific kind of part I'll need? I searched around for "female USB 3.0 type b" and get results like this. It looks like what I need, but is it compatible? Or is there something else I may be missing?

I hate type-B, or really anything that isn't C at this point. Given I'm replacing the entire piece, can I use a female USB-C port instead? I have zero electronics knowledge short of being able to follow soldering guides and the like, but I have nothing to support this kind of idea.

⟐ Commented September 12, 2020 at 20:43 MST

⟐ Commented July 13, 2020 at 18:38 MST