Touch screen test
Paint the screen with your fingers to find dead zones, ghost touches, and multi-touch limits. Trails follow every touch — gaps that won't paint are the problem areas.
Touch screen FAQ
- How do I find dead zones on my touch screen?
- Start the test and slowly drag a finger across the entire screen in overlapping rows, like mowing a lawn. Everywhere you touch leaves a painted trail — any spot that stays unpainted no matter how you swipe over it is a dead zone in the digitizer.
- What are ghost touches?
- Touches the screen registers when nothing is touching it — you'll see dots or streaks appear on their own during the test. Common causes are a damaged digitizer, a cheap charger injecting noise while plugged in, moisture, or a poorly fitted screen protector. Try the test unplugged with the protector off.
- How many touch points should my screen support?
- Nearly every modern phone and tablet tracks 10 simultaneous touches; budget devices sometimes track 5, and touch laptops vary. Press with several fingers at once — the counter at the bottom shows how many the screen is really tracking.