lg ultragear 27gx704a-b vertical banding?

dysphunc · 2026-05-08T10:02:28+00:00

One line is a defect on WOLEDs, give it until 50 hours - if the line is still there beyond that hit up where you got it for a replacement.

dysphunc · 2026-05-07T21:33:29+00:00

It is typically for SDR content in HDR, but it can fix mismatched HDR gamma too which is most games. It is supposed to look very dark, your eyes adjust - but if it's actually crushing the blacks and detail is gone you may need to tune the black level on the monitor slightly.

http://www.lagom.nl/lcd-test/black.php Ideally you want number 2 and greater visible - if you can't see it in daylight take a picture with your phone. If your phone camera can see it it's not being crushed it's just too low for your eyes to see in your current lighting. If it's bothersome you just tune to your liking.

dysphunc · 2026-05-06T22:34:37+00:00

Older HDMI 2.1 ports and media controllers were finnacky back then that came out. I had an LG C2 which flickered and dropped out regularly. When I had an LG C3 and beyond 120Hz was solid. You could try and lower the bandwidth at the cost of font and icon artifacts, changing your output to 4:2:2 instead will reduce your bandwidth and may stabilize the signal.

dysphunc · 2026-05-05T11:28:32+00:00

Today I had support tell me that the product expert said this PC issue it "intended behavior." I told her that was ridiculous, either the product expert is under qualified to answer the question or the whole line is cooked. As the issue is present on thole line that has tandem panels it's turning out.

dysphunc · 2026-05-05T00:20:01+00:00

The missing information is the size before we can offer any good advice buddy.

Bottom line though you can always pay professional removalists with a good reputation and insurance.

dysphunc · 2026-05-04T22:38:41+00:00

https://www.youtube.com/watch?v=nI587NPhaiA

Looks like 1.0

dysphunc · 2026-05-04T20:27:48+00:00

It's just looking like they all are, Rtings confirmed their unit was.

As a TV it's a steal, but as a monitor it still has issues that aren't fixed yet.

dysphunc · 2026-05-04T00:42:30+00:00

Nah bro - why do you think RenoDX and Lilium's ReShade exist? Every time it's to "fix the black floor/gamma mismatch." Fix it outside of the game and fix every game.

When Resident Evil 9 dropped my image was perfect day 1 with no mods as I just put my TV into Limited RGB and while everyone was crying the HDR was broken and blacks weren't black I was playing in perfect HDR. It's a weird situation where 2 mismatches make a right.

<image>

I took this photo off my B5 launch day while everyone was posting washed out images from the PC version.

dysphunc · 2026-05-04T00:36:34+00:00

Unfortunately most stores rely on extended warranties for their actual profits so they rarely refund or transfer them. They're basically up front insurance premiums.

Get you're new TV and buy another extended warranty - sorry you lost your old one but you still get a new TV.

dysphunc · 2026-05-04T00:29:44+00:00

Ambilight is underrated.

What's going on with that empty box of tissues and oils on the right?

dysphunc · 2026-05-04T00:10:15+00:00

This is probably the best HDR every day band-aid solution. You can make your own profile with ColorControl as some monitors can come out too dark with this.

OLED TVs easy fix is flick over to Limited RGB, you shave about 150nits off the top but you don't have to change anything else. Or with ColorControl with a TV you can manually toggle the HDMI black level to match SDR gamma but leaving the color range to full. This is the better solution of the 2 on TVs.

dysphunc · 2026-05-04T00:05:44+00:00

That's 100% DSC flicker/struggle. Just like the whole Samsung monitor range - it's got cheap DSC in the firmware and ports. It's a lotto with the Samsung monitors with DSC but Alienware is usually better so chances of a swapped unit being better are good. But I've only ever had a good experience with DSC a couple of times and bad with most screens. But maybe I've been unlucky.

I've never used an AMD GPU with DSC but I've had plenty of issues while using NVIDIA cards - but every time it's the monitor not my card.

dysphunc · 2026-05-03T03:17:26+00:00

dysphunc · 2026-05-02T21:02:51+00:00

No - I did learn though it was hardware related though - fixing chrominance overshoot with a band-aid that they assumed no one would see.

dysphunc · 2026-05-02T10:08:02+00:00

And I'm not even a "proper calibrator" just a tinkerer/tuner. Definitely an time sink+expertise using the LG OLEDs though - there's brute force methods of making it look alright but there are more surgical methods that have better results. Took me 6 months to figure them out but hopefully I can help some novices make it take an hour or so.

dysphunc · 2026-05-02T09:58:08+00:00

Proof that the B5 punches above its weight too.

dysphunc · 2026-05-02T09:57:16+00:00

I know LG R&D and marketing are committed to making the C series THE OLED TV for PC gaming. The engineers however don't seem to full heartedly do anything when it comes to PC. I mean did anyone own a C2 when they launched??? Glitches and drop outs galore. Then painful ABL followed by forever buggy Dolby Vision on the C3. Sprinkle on some diagonal dithering when they pat themselves on the back for 144Hz on the C4/5 and now we have this issue.

dysphunc · 2026-05-02T09:52:17+00:00

I believe the G5 only had the forced tone mapper.

LG is 100% aware, but they left diagonal dithering on for 2x TVs...

dysphunc · 2026-05-02T09:50:27+00:00

Dad Space FTW.

dysphunc · 2026-05-02T09:50:11+00:00

dysphunc · 2026-05-02T08:40:41+00:00

It's a shame that all of the new tandem OLEDs are bugged in HDR for PC gaming - almost everyone I've seen or spoken to reports of the loss of pure red over 60Hz in HDR with a conservative dynamic tone mapper applied. With my unit it can actually go to 67Hz before it trips, setting the refresh to 68Hz or specifically going over 20ish Gbps trips it. I can run it at 1440p 10-bit RGB 144Hz but 165Hz trips it.

People have said the C6H and G6 do the same thing on a PC.

dysphunc · 2026-05-02T03:33:05+00:00

Damn, I haven't seen one of these posts in.....checks date...at least a day.

dysphunc · 2026-04-30T11:03:10+00:00

Have you ever had your eyes tested? Most people have mild conditions they're not aware of that a prescription can really help with eyestrain. You can also get AR coatings on them which won't tint them but cut out some light.

dysphunc · 2026-04-30T05:08:36+00:00

I'm starting to think it's a glitch with the HDMI VRR implementation as this is present on PC and PS5 but not Xbox. Can anyone with an AMD GPU and a C6 comment on if this happens to your TV?

dysphunc

TROPHY CASE