LG phone screen shows strange colors — what to do next with safe diagnostic checks

Hey! If your LG phone screen shows strange colors (odd tint, washed-out display, inverted colors, rainbow bands, green/purple cast, flicker with discoloration), we can sort out what category it’s in using safe, non-destructive checks — no risky resets and no “guaranteed fix” claims.

People mean different things by “weird colors,” so I’ll start by mapping the symptom. Which of these sounds closest?
• A constant tint (yellow/green/purple screen tint)
• Colors look inverted (whites turn dark, images look negative)
• Strange lines or patches (vertical lines, blotches, color bands)
• Only certain apps look wrong (camera/photos/video look off, but menus seem normal)
• Changes with brightness (low brightness looks green/gray, high brightness looks normal)

Tell me anything you know, any order:
1) LG model + Android version (if you know)
2) When did it start? After an update, drop, moisture, new screen protector, or changing display settings?
3) Is it visible on the lock screen and screenshots, or only “on the physical screen”?

That’s a very “diagnosable” pattern: greenish / dull colors that are worse at low brightness. That can happen with certain display modes and filters, but it can also point to how the screen panel behaves when brightness is low. We won’t jump to conclusions — we’ll collect a couple of clean clues.

First, quick context questions that help a lot (answer any):
• Does the tint show up on the LG boot logo (the very first logo when powering on) or only after Android loads?
• Does it happen in screenshots? (This one is important.)
• Any flicker, lines, or patches — or is it purely “colors look wrong”?

The reason I’m asking: if the weird colors appear in a screenshot when you view it on another device, that suggests a software-level color effect. If screenshots look normal elsewhere but the phone’s screen looks wrong, that leans more toward a display/output issue.

That’s excellent troubleshooting info. Screenshot looks normal on another phone usually means Android is rendering the colors correctly — and the problem is in how your device is displaying them (screen/panel behavior, brightness control, or something affecting the physical display layer). The small flicker at low brightness also fits that theme.

We still want to rule out a couple of “looks-like-hardware but isn’t” settings — safely and without doing anything irreversible.

Quick checks (you can do them in any order, and you can stop anytime):
1) Color effects check: Is Color inversion, Color correction, or a high-contrast accessibility feature turned on? Those can make whites/skin tones look off, especially if enabled accidentally via a shortcut.
2) Night light / comfort view check: A blue light filter typically makes the screen warmer/yellower, but some display modes can make colors look muted or grayish depending on settings.
3) App overlay check: Any “screen dimmer,” “reading mode,” or display filter apps installed recently?

No need to list every setting — just tell me: do you recall using accessibility shortcuts or a bedtime/eye comfort mode recently?

Got it. Since it’s strongly tied to low brightness, here are a few safe “comparison tests” that help narrow the cause without pretending we can fully repair it from a webpage.

Comparison A (brightness curve): Does the color shift happen at a specific threshold (like below 20–30%), or is it gradual? A sharp threshold can suggest a brightness-control behavior rather than a global software filter.

Comparison B (content type): Do black/dark screens look blotchy or green-ish, while bright screens look mostly normal? People often notice this in dark mode, YouTube, or gray backgrounds.

Comparison C (rotation/refresh): If you rotate the phone or switch between dark and light mode, does the tint “follow” instantly or lag/flicker? Lag/flicker can be a display driving clue.

Also, I want to ask one safety-oriented question that’s easy to overlook: did the phone have any recent drop, pressure in a tight pocket, or moisture exposure (even “light rain”)? Sometimes there’s no crack, but the display layer can still start acting strange.

That’s consistent with “dark/gray looks off, bright looks better,” and the sweat/humidity detail is worth noting — not because it proves anything, but because it’s a plausible trigger for temporary weirdness or longer-term display changes.

Here’s a practical way to separate software rendering from screen hardware/output using safe checks:
1) Screenshot test (you already did): If screenshots look normal elsewhere, Android’s color data is likely fine.
2) Photo-of-screen test: Take a photo of your screen using another phone. If the photo shows the green/gray tint clearly, that suggests it’s really on the display (not “in the file”).
3) Safe Mode test (diagnostic): If a third-party app is applying a filter or interfering with display, Safe Mode often changes the behavior. If nothing changes in Safe Mode, we stop blaming apps.

I’m not asking you to do a bunch of steps in the middle of a glitch. One question first: does the strange color look show up in all apps (settings, browser, gallery), or do you mainly notice it in photos/video?

That’s another strong clue: if another phone can “see” the tint in a photo, it points to how the LG display is physically presenting color, not a weird filter baked into screenshots.

At this stage, the safest “what to do next” is still about confirmation and risk reduction, not pretending we can fix a panel issue remotely.

Here are the next safe checks that add clarity without wiping anything:
• Accessibility color features check: Quickly confirm color inversion/correction is off (because those can mimic “wrong colors” even across the system).
• Safe Mode comparison: If the screen looks the same in Safe Mode, third-party filters are unlikely to be the root cause.
• External display comparison (if available): If you can cast to a TV/monitor and the colors look normal there, it reinforces that the GPU output is fine and the phone’s panel is the issue.

One more thing I want to understand: do you see any temporary afterimage (like icons faintly lingering), or is it purely a tint/gray shift?

It would mean “apps are less likely,” but it still doesn’t force a single conclusion. Real support is about probabilities and evidence, not one dramatic answer.

Here’s the calm interpretation most techs use:
• If the boot logo looks normal, screenshots look normal elsewhere, and the tint appears on the physical screen (especially at low brightness), that often points to the display/panel side of things — but the next step is usually hands-on evaluation, not immediately ordering parts.

What to do next (safely):
• Stop using unknown chargers/accessories if you notice flicker changing while charging.
• Keep the phone dry and avoid heat/pressure while you’re testing (humidity and pressure can worsen display symptoms).
• Write down the exact pattern (brightness threshold, dark mode behavior, any flicker) — that’s the most useful info for a repair tech or warranty claim.

If you tell me whether the color shift is sharp below a certain brightness or constant at all levels, I can help you describe it in a way that makes diagnosis faster — without pretending there’s a magic universal fix.