Question Is this the end for my LG 27GN950-B ?

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mrmiller

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Aug 3, 2018
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I've been using my LG 27GN950-B monitor for nearly 5 years, and it's been amazing. Recently I have started encountering a strange problem.. usually when I turn on the PC, the keyboard+mouse+2X monitor all wakes up like it should. but recently when I turn on my PC, my main monitor doesn't detect that the PC is on. Instead, my secondary (smaller) monitor, which is also connected to the PC to the same GPU (RTX 3080), turns on and becomes the primary display. I have tried turning the monitor on manually, but it still doesn’t detect anything and sometimes it even freezes 😵 and the only way to fix it is to unplug it from the power and plug it back in.

I thought the DisplayPort 1.4 cable might be faulty, so I bought a new one (3 different types) but it didn’t help.

I switched the connection to a different port on the GPU, but that also didn’t work.

I connected the monitor to my MacBook using an HDMI cable, and it worked!

So....... I didn’t know what to do so I unplugged the power cable a couple of times because the monitor was stuck while I was using the OSD (when no input was detected the monitor just froze I don't know why). After reconnecting it 3–4 times, it finally detected my main PC. It started working perfectly for about two months, but then, boom.. it happened again. why is this happening? what’s going on? I don’t understand.. is the monitor dying? suffering? my GPU? should I downgrade/update the driver?
 
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should I downgrade/update the driver?
Use DDU to remove all GPU drivers(Intel, AMD and Nvidia) in Safe Mode, then manually reinstall the latest GPU driver in an elevated command, i.e, Right click installer>Run as Administrator(assuming you're on Windows OS).

What motherboard are you working with? Might also be a good idea to see if you're pending any BIOS updates. you've mentioned hooking the monitor up to a MacBook, have you tried tethering the monitor to another Windows machine?
 
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Lutfij said:
should I downgrade/update the driver?
Use DDU to remove all GPU drivers(Intel, AMD and Nvidia) in Safe Mode, then manually reinstall the latest GPU driver in an elevated command, i.e, Right click installer>Run as Administrator(assuming you're on Windows OS).

What motherboard are you working with? Might also be a good idea to see if you're pending any BIOS updates. you've mentioned hooking the monitor up to a MacBook, have you tried tethering the monitor to another Windows machine?
Click to expand...

Mobo: PRIME X470-PRO, ver: 6223 - It's one version before the newest (should I?)
My OS is Win10, I usually install/update drivers using DDU and then install the driver through NVCleanstall
and... I don't have any Win laptop or machine
 
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Mobo: PRIME X470-PRO, ver: 6223 - It's one version before the newest (should I?)
I make sure that I'm on the latest BIOS version, in the event that some anomalies pop so at the end of the day, I've made sure I've explored as many avenues before calling it a day.

I don't have any Win laptop or machine
You don't need to have one, you can take the panel over to your friend's or neighbors and test it out there.
 
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Lutfij said:
Mobo: PRIME X470-PRO, ver: 6223 - It's one version before the newest (should I?)
I make sure that I'm on the latest BIOS version, in the event that some anomalies pop so at the end of the day, I've made sure I've explored as many avenues before calling it a day.

I don't have any Win laptop or machine
You don't need to have one, you can take the panel over to your friend's or neighbors and test it out there.
Click to expand...

I don't have anyone right now for this mate 🙁
 
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forget to say but the problem came back 2 time since my last post.. and today is the third time.
if I contact LG, is there a chance they can fix it for me for a fee or something?? I really don't want to buy new monitor right now..
 
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5 years old - no warranty. Correct?

I would not expect that the monitor can be repaired for less than the cost of a new 27" monitor.

And even if repaired something else is likely to fail and you will be out the costs of the parts & labor needed to initially fix the 5 year old monitor.

Scout around a bit, you may be able to find a new monitor on sale. Or even discounted more as "open box".

You end up with a new monitor that works and hopefully carries a warranty. Check to be sure.

Just my thoughts on the matter.
 
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Ralston18 said:
5 years old - no warranty. Correct?

I would not expect that the monitor can be repaired for less than the cost of a new 27" monitor.

And even if repaired something else is likely to fail and you will be out the costs of the parts & labor needed to initially fix the 5 year old monitor.

Scout around a bit, you may be able to find a new monitor on sale. Or even discounted more as "open box".

You end up with a new monitor that works and hopefully carries a warranty. Check to be sure.

Just my thoughts on the matter.
Click to expand...
yeah the warranty is probably no longer valid, I mean I bought it on amazon at the end of 2020 so it must be over... The monitor itself works fine overall. I believe the issue is with the DisplayPort connection not working properly or something? the problem is....... I have no idea how to explain or demonstrate it because sometimes the monitor works perfectly fine again, like nothing ever happened. So it’s hard to show them the issue. Is the repair really that expensive? even if I check with a third party technician not specifically LG technician?
 
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If you plug a video cable into the monitor's Display Port connection and gently wiggle, push/pull, or otherwise move the plug about does the monitor image go black or otherwise change in some manner?

Does the plug wiggle in the socket? Does the entire socket move? Does it make a difference if the monitor is cold (has been off for awhile) or starts to work again sometime after being turned on?

You need to confirm for certain if the problem is the host PC, the host PC's video ports (iGPU, GPU), the video cable, the monitor's port, or the monitor itself.

As I understand the posts thus far the video cable and the host PC's video ports have been eliminated.

So, for the sake of discussion, the problem may simply be a broken (but touching) or loose video connection in the monitor's Display Port.

Will it be expensive to fix?

The monitor possibly being repairable for the cost being labor and/or parts. The work being done by someone with the necessary knowledge and skills. Price also dependent on the general honesty of the repair shop..... Especially if you have no way to check on what was actually done. Tighten a screw and change for parts and bunch of labor.....

To me, a good repair shop should be aware or otherwise recognize that the problem could be intermittent ("because sometimes the monitor works perfectly fine again, like nothing ever happened") and test the monitor over a few days - likely by just using it.

Ask around: check with family, friends, co-workers, etc. Visit or call a few shops - if any.

Hopefully you will find someone willing to take a look at the monitor and honestly advise you about what might be done and the fair costs of doing so.

You can learn a lot about a repair shop by just visiting and looking around....
 
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