How to Find Touchscreen Dead Zones
Dead zones are regions of a touchscreen that don't register touch input. They're usually caused by digitizer damage (cracked or delaminated), screen protector adhesive failure, or water damage. Our touch test reveals dead zones by leaving a colored trail wherever your finger registers: gaps in the trail mark dead zones. Drag your finger slowly in a serpentine pattern covering the entire screen. Pay extra attention to the edges, corners, and the top notch area, where dead zones most commonly occur. Test both with light pressure and firm pressure: some digitizers need more force after damage. If you find a dead zone, the next step depends on cause. Lift any screen protector and retest with the bare screen. If the dead zone disappears, the protector is faulty: replace it with a thinner one or remove it entirely. If the dead zone remains, the digitizer is damaged and needs repair or replacement. For partial dead zones (touches register but inaccurately), recalibrate the touchscreen if your device supports it. Most modern phones don't expose calibration controls, but tablets and laptops often do. On Windows touchscreens: Control Panel → Tablet PC Settings → Calibrate.