Screen Test: Dead Pixel Check

LFC LAB

Contains ads

About this app

Screen Test is a full-screen display tester for visually checking dead pixels, stuck pixels, possible burn-in, screen colors, gradients, patterns and touch response on phones and tablets.

Use it when checking a new phone, inspecting a used device, or confirming display condition after repair. The app shows solid colors, gray levels, gradients and test patterns so you can review your screen directly.

Main features
- Full screen color test
- Dead pixel check
- Stuck pixel check
- AMOLED/OLED burn-in check helper
- Touch and multi-touch test
- Gradient and color banding check
- Grid, line, edge and pattern tests
- Quick screen check mode
- Keep screen awake option
- Korean and English support

This app is a visual screen test utility. It does not automatically diagnose hardware defects and does not repair burn-in or damaged pixels.

Run a simple full-screen display test to check dead pixels, possible burn-in, screen colors, gradients and touch response directly on your device.

What’s new

Improved local data backup reliability.
- Added hourly local backups when saving data
- Restores from the latest backup if main data is damaged
- Refined Google Drive backup startup behavior
- Improved backup settings screen text and account disconnect display