Symptoms
- Screen flashes or strobes
- Worse at certain brightness levels
- May flicker only when opening some apps
- Sometimes stops after tapping the screen
Likely causes
- CommonLoose display connectorA drop or bend can partially disconnect the ribbon cable feeding the screen.
- CommonAuto-brightness or adaptive refresh rate glitchSoftware adjusting brightness rapidly can look like flicker.
- PossibleFailing display panelAging OLED panels can flicker, especially at low brightness.
- Less commonThird-party app conflictA poorly coded app can cause rendering glitches.
What to do
- Restart the phone to clear any temporary display glitch.
- Turn off auto-brightness and manually set brightness to see if flicker changes.
- Boot into safe mode (if available) to see if a third-party app is causing it.
- Update the phone's software to the latest version.
- Gently press near the screen edges to see if flicker changes, suggesting a loose cable.
- If flicker only happens at low brightness on an OLED phone, note this for the repair shop.
Tools and parts
Display assemblySearch: “screen replacement for [your phone model]”
When to call a pro
See a repair shop if flicker continues after a restart, software update, and safe mode test.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.