LG27GL850 causing fault light on MoBo

Coowhan · 29 Apr 2020 at 00:39

Recently just bought an LG 27GL850 2 days ago and yesterday all was grand until today my white VGA debug light stays on the whole time after booting. (Very annoying as my PC is on my desk and I can literally see it in the corner of my eye) It also isnt allowing me to access the BIOS from boot or through windows. I have identified this as the monitor as I plugged in my old one using the old DVI cable I was using originally with this. No lights, no issues accessing BIOS either. LG is using Display port 1.4.

Kinda bummed honestly cause I absolutely love the monitor, makes my old zowie 24 inch 1080p one look like crap... Anyone else had issues like this before? Is this a simple settings issue or will i have to return it?

Too Tall · 29 Apr 2020 at 02:48

Connect via hdmi the old cable and disable the vga?

Coowhan · 29 Apr 2020 at 13:40

Too Tall said:
Connect via hdmi the old cable and disable the vga?

Monitor works as it should connected via HDMI, however it is limited to 100Hz opposed to 144Hz through DisplayPort. That is no good to me. So I think I will be returning this monitor.

Thekwango · 29 Apr 2020 at 14:00

Coowhan said:
Monitor works as it should connected via HDMI, however it is limited to 100Hz opposed to 144Hz through DisplayPort. That is no good to me. So I think I will be returning this monitor.

It’s my understanding that’s a limitation of hdmi rather than the monitor. I thought 144hz was only achievable over dp? Apologies if I’m wrong.

bloodiedathame · 29 Apr 2020 at 14:03

Put some tape over the light.

Brok · 29 Apr 2020 at 14:09

144hz is possible over HDMI, I'm using one right now as a 2nd monitor from my laptop and its at 144hz plugged into HDMI1. I do remember it requiring some tweaking though, cant remember what sorry!

**Edit** Ah yes, you have disable active sync over HDMI to get 144hz. This is fine for my laptop use as its just for work. I have my gaming PC plugged in via DP and get 144hz with adaptive sync.

Coowhan · 29 Apr 2020 at 20:29

So update on this, ran this past my uncle to see if he had a spare cable and he pointed me to nvidia firmware update tool. I still have a GTX 1080 at the moment and there is an update available for these to run display port 1.3 and 1.4. Installed the driver and hey presto, everything is fixed. Assuming it was locked to Display port 1.2 beforehand which was causing all the problems.

Trunkey · 29 Apr 2020 at 21:39

Well that was a simple fix glad it’s sorted, a reminder to us all to keep on top of driver updates or at least beware of what they contain.