How to Fix Galaxy S23 Dead Pixels on Display (2026 Guide)

Dead pixels on your Galaxy S23 show up as tiny black, white, or colored dots that refuse to change no matter what’s on screen. The most common cause is a manufacturing defect in the OLED panel’s sub-pixel transistors, though physical impact and pressure damage can also kill individual pixels over time. Before you pay for a screen replacement, there are several fixes worth trying — starting with the ones most likely to work.

One important distinction first: dead pixels (permanently black, receiving no power) are harder to fix than stuck pixels (frozen on one color like red, green, or blue). Stuck pixels respond much better to the DIY methods below. If your dot is black, you may still want to try these steps, but set realistic expectations — truly dead pixels often require professional repair or screen replacement.

How to Test Your Galaxy S23 Display for Dead Pixels

Before attempting fixes, confirm what you’re dealing with. Samsung includes a built-in diagnostic tool:

1. Open the Phone app
2. Dial *#0*# on the keypad (the screen changes immediately — you don’t need to press call)
3. Tap Red, Green, and Blue buttons to fill the screen with solid colors
4. Look carefully for any dots that don’t match the background color
5. Tap Black to check for pixels stuck in an “on” state

This diagnostic confirms whether you have dead pixels, stuck pixels, or a software rendering issue. If the dots disappear during this test, your problem is likely software-related (a misbehaving app or display setting), not a hardware defect.

You can also use third-party apps like Dead Pixels Test and Fix from the Google Play Store, which automates the color-cycling process and can flag exact pixel locations.

Fix 1: Run a Pixel Fixer App or Video (Best for Stuck Pixels)

This is the most effective DIY method for stuck pixels and should be your first attempt. Pixel fixer tools rapidly cycle through colors at the sub-pixel level, which can “unstick” a pixel that’s frozen on one color.

How to do it:

1. Download a dead pixel fixer app from the Play Store (search “dead pixel fix”) or find a pixel fixer video on YouTube
2. Position the flashing color pattern directly over the affected pixel area
3. Let it run for 20-30 minutes — don’t check constantly, give it time
4. Turn the screen off for 5 minutes, then check if the pixel has changed
5. If partially improved, repeat for another 30 minutes

Why this works: Stuck pixels occur when a sub-pixel’s transistor gets locked in one state. Rapid color cycling sends varying electrical signals that can reset the transistor. Success rates are highest for stuck pixels (roughly 50-60%) and much lower for truly dead pixels.

Fix 2: Apply Gentle Pressure to the Affected Area

Applying light, targeted pressure can sometimes reconnect a loose or partially disconnected pixel transistor. This method works best when dead pixels appeared after the phone was dropped or bumped.

How to do it:

1. Power off your Galaxy S23 completely
2. Place a small piece of microfiber cloth over the dead pixel area
3. Using a stylus tip or the eraser end of a pencil, apply very gentle pressure directly on the pixel through the cloth
4. Hold for 5-10 seconds, then release
5. Power the phone back on and check the pixel

Important: Use minimal pressure. Pressing too hard on an AMOLED display can damage additional pixels or crack the underlying OLED layer. If you don’t see improvement after 2-3 gentle attempts, stop — more force won’t help and risks making things worse.

Fix 3: Power Cycle and Leave the Display Off for 24 Hours

Sometimes pixels get stuck due to prolonged static images or display burn-in patterns on OLED screens. A full power-down rest period lets the organic compounds in the OLED pixels fully discharge and can resolve transient pixel issues.

How to do it:

1. Press and hold the Side button + Volume Down simultaneously
2. Tap Power off
3. Leave the phone powered off for at least 24 hours
4. Power back on and immediately run the *#0*# diagnostic to check the pixel

This won’t fix physically damaged pixels, but it resolves a surprising number of “stuck” pixel reports — especially those that appeared gradually rather than after an impact.

Fix 4: Boot into Safe Mode to Rule Out Software Issues

A misbehaving app or overlay can sometimes create artifacts that look exactly like dead pixels. Safe Mode disables all third-party apps so you can tell the difference.

How to do it:

1. Press and hold the Side button + Volume Down
2. When the power menu appears, press and hold the “Power off” option
3. Tap Safe mode when prompted
4. Once in Safe Mode, run the *#0*# display diagnostic
5. If the “dead pixel” disappears in Safe Mode, a third-party app is causing it
6. To exit Safe Mode, restart your phone normally

If the pixel vanishes in Safe Mode, uninstall recently installed apps one by one until the culprit is found. Screen overlay apps, blue light filters, and custom launchers are common offenders.

Fix 5: Update Your Software

Samsung periodically releases display driver updates through One UI patches. A known display rendering bug could cause pixel-like artifacts that a software update resolves.

How to check:

1. Go to Settings → Software update → Download and install
2. Install any available updates
3. After restarting, check if the dead pixel persists

As of 2026, the Galaxy S23 is running One UI 7 based on Android 16. Make sure your phone is fully updated, as earlier One UI versions had documented display rendering issues that Samsung has since patched.

Fix 6: Perform a Factory Reset (Last Software Resort)

If Safe Mode didn’t help but you suspect software, a factory reset eliminates any corrupted display settings or cached data that could mimic dead pixels.

Before resetting:

1. Back up all data via Settings → Accounts and backup → Samsung Cloud or Google backup
2. Note your Samsung account credentials and Google account info
3. Go to Settings → General management → Reset → Factory data reset
4. Tap Reset and confirm

If the dead pixel remains after a factory reset, it’s confirmed as a hardware issue — proceed to the repair options below.

When DIY Fixes Don’t Work: Repair and Replacement Options

Samsung Warranty Repair

Samsung’s standard warranty covers the Galaxy S23 for one year from the date of purchase. For Super AMOLED displays, Samsung’s dead pixel policy typically covers repair or replacement when 3 or more dead pixels are present. A single dead pixel may not qualify for free warranty service, though policies vary by region.

How to file a warranty claim:

1. Call 1-800-SAMSUNG (1-800-726-7864) — available Monday-Friday 8am-Midnight EST, weekends 9am-11pm EST
2. Or visit samsung.com/us/support to start a live chat
3. You can also use the Samsung Members app → tap Get help → Contact us
4. If approved, Samsung will direct you to a nearby authorized repair center or offer a mail-in option

Samsung Care+ subscribers may get screen repair for as low as $29 with their plan. Without a protection plan, Samsung’s standard screen replacement for the Galaxy S23 typically costs around $200-$250 through an authorized repair center.

Third-Party Repair (uBreakiFix / Asurion)

uBreakiFix by Asurion is Samsung’s authorized third-party repair partner in the US. They use genuine Samsung parts and maintain your remaining warranty coverage.

• Find a location at ubreakifix.com
• Walk-in appointments available at most locations
• Typical turnaround: same-day for screen replacements

DIY Screen Replacement

For those comfortable with phone repair, replacement Galaxy S23 AMOLED screens are available online. iFixit provides a detailed Galaxy S23 Screen Replacement guide with step-by-step instructions and sells the replacement screen directly.

What to know before DIY repair:

• Replacement AMOLED screens for the Galaxy S23 range from $80-$180 depending on quality (original vs. aftermarket)
• You’ll need a heat gun or iOpener, suction cup, spudger, and precision screwdriver set
• The repair voids your IP68 water resistance rating
• Fingerprint sensor calibration may be needed after the swap
• Test the replacement screen before fully sealing the phone

Note: Amazon affiliate links for replacement screens should be spot-checked before purchasing, as listings frequently change. Search “Samsung Galaxy S23 replacement screen AMOLED” on Amazon for current options at various price points.

Dead Pixels vs. Other Galaxy S23 Display Issues

Not every display anomaly is a dead pixel. Here’s how to tell the difference:

Symptom	Likely Cause	Fix
Single black dot, never changes	Dead pixel (hardware)	Pressure fix, repair, or replacement
Single colored dot (red/green/blue)	Stuck pixel (hardware)	Pixel fixer app, pressure fix
Cluster of dark spots that spread	Display damage / OLED degradation	Screen replacement
Faint image ghost when screen is off	OLED burn-in	Not dead pixels — use dark mode, reduce brightness
Flickering dots that come and go	Software glitch or loose display cable	Safe Mode test, software update, or repair
Green or pink line across screen	Display connector or panel failure	Warranty repair — this is a known S23 issue

If you’re seeing a green or pink line running vertically across your display, that’s a different and more serious issue than dead pixels. This typically indicates a failing display driver IC and almost always requires a screen replacement under warranty. [INTERNAL LINK: Galaxy S23 display line issue]

How to Prevent Dead Pixels

While you can’t fully prevent manufacturing defects, these habits reduce the risk of developing dead pixels over time:

• Use a quality screen protector — absorbs minor impacts that could damage individual pixels
• Avoid leaving static images on-screen for hours — OLED pixels degrade unevenly with static content (use screen timeout settings)
• Keep brightness at auto or below 80% — excessive brightness accelerates OLED sub-pixel aging
• Use a protective case — reduces the chance of pressure damage from pocket items or drops
• Enable Dark Mode — reduces overall pixel workload on AMOLED displays, extending display lifespan

Our Recommendation

Start with the pixel fixer app method (Fix 1) — it’s free, risk-free, and has the highest success rate for stuck pixels. If that doesn’t work, try the 24-hour power-off (Fix 3) followed by the gentle pressure method (Fix 2). Run through Safe Mode (Fix 4) and a software update (Fix 5) to rule out software causes.

If none of these resolve the issue, your Galaxy S23 has a genuine hardware defect. Check your warranty status first — Samsung covers dead pixel clusters under warranty. For out-of-warranty phones, uBreakiFix offers same-day professional repair with genuine Samsung parts, or you can save money with a DIY replacement using iFixit’s guide and parts.