How to Fix Unresponsive Areas on Your Phone Touchscreen

Published 2026-10-16 · Marion Phone Repair

Parts of your phone's screen do not respond when you tap or swipe. Maybe the bottom row of the keyboard does not register, or a stripe across the middle of the screen ignores your touches, or the edges do not respond. The rest of the screen works fine, but these specific areas are dead — no matter how hard you press or how precisely you tap, nothing happens. Dead spots on a touchscreen can be caused by software issues, screen protector problems, or hardware damage.

Test the touchscreen systematically

Before troubleshooting, map exactly where the dead spots are. This helps determine the cause:

Use a touchscreen test app

• Android: Search the Play Store for touchscreen test or touch screen test. These apps display a grid and highlight every point you touch, making dead spots immediately visible as areas where touches are not registered. Many also show multi-touch capability and touch pressure
• iPhone: There is no built-in touch test. Open the Notes app, select the drawing tool, and try to draw across every area of the screen. Dead spots will show as gaps in your drawing where the line breaks
• Android hidden diagnostic: On some Android phones, dialing *#0*# in the Phone app opens a diagnostic menu with a Touch screen test option. Samsung phones support this code

Pay attention to the pattern of dead spots — a single small area, a horizontal or vertical stripe, the edges only, or random scattered spots all suggest different causes.

Software fixes

Restart the phone

A full restart resets the touchscreen controller firmware. Power off completely, wait 10 seconds, and power back on. Touch controller glitches that cause temporary dead spots are resolved by a restart in many cases. If dead spots appear intermittently and go away after a restart, this confirms a software issue rather than hardware damage.

Check for system updates

Touchscreen calibration and sensitivity are controlled by firmware that receives updates through system updates. A known touch bug can be fixed in a software update. Check Settings, System, Software Update (Android) or Settings, General, Software Update (iPhone).

Boot into Safe Mode (Android)

Safe Mode disables all third-party apps and runs only the base operating system. If the dead spots disappear in Safe Mode, a third-party app is interfering with the touch controller:

1. Press and hold the power button until the power menu appears
2. Press and hold the Power Off option until Safe Mode appears
3. Tap Safe Mode to restart in Safe Mode
4. Test the touchscreen — if dead spots are gone, a recently installed app is likely the cause
5. Restart normally and uninstall recently added apps one at a time to find the culprit

Screen overlay apps (blue light filters, screen dimmers, screen recording tools) are common causes of touch issues because they add an invisible layer over the screen that can interfere with touch detection.

Adjust touch sensitivity (if available)

Some phones have touch sensitivity settings that may help:

• Samsung: Settings, Display, Touch Sensitivity. Increasing sensitivity can help with minor dead spot issues, especially near the screen edges
• Google Pixel: Settings, Display, Touch Sensitivity (designed for use with screen protectors but helps in general)
• iPhone: Settings, Accessibility, Touch, Haptic Touch or 3D Touch. Adjust the touch sensitivity and duration settings

Screen protector issues

Air bubbles under the protector

Air bubbles trapped between the screen protector and the screen create areas where touch does not register. The gap prevents your finger's capacitive signal from reaching the screen's touch sensor. Push out any bubbles using a credit card or microfiber cloth, pressing from the center toward the edges.

Thick or low-quality protectors

Very thick tempered glass protectors (over 0.4mm) or cheap protectors with poor adhesion can reduce touch sensitivity, especially near the edges where the protector may not make full contact with the screen. Try removing the screen protector entirely and testing the touchscreen. If dead spots disappear, the protector was the problem — replace it with a thinner, higher-quality protector designed for your specific phone model.

Misaligned protectors

On phones with curved screen edges, a protector that does not properly fit the curves can lift at the edges, creating dead zones along the sides of the screen. This is especially common on Samsung Galaxy S series and other phones with edge-curved displays.

Hardware causes

Drop damage

If dead spots appeared after dropping the phone, the touchscreen digitizer (the layer that senses touch, separate from the display panel that shows the image) may be damaged. The screen can look perfectly fine visually — no cracks, no discoloration — but the touch layer underneath has cracked or disconnected in the area of impact. This requires screen replacement.

Pressure or flex damage

Sitting on the phone, placing heavy objects on it, or the phone flexing in a tight pocket can damage the digitizer internally. Flex damage often creates a horizontal or vertical stripe of dead spots because the touch sensor traces run in lines — breaking one trace disables touch along its entire path.

Water damage

Moisture under the screen (from water exposure, humidity, or condensation) can cause erratic touch behavior including dead spots, phantom touches, and unresponsive areas. If the phone was recently exposed to water or moisture, let it dry completely in a warm, dry environment for 24 to 48 hours. Persistent touch issues after water exposure indicate corrosion on the digitizer's flex cable or connector, which requires professional repair.

Connector issue

The touchscreen digitizer connects to the phone's main board via a thin ribbon cable and a small connector. If this connector is partially dislodged — from a drop, heat cycling, or manufacturing variation — parts of the touchscreen may stop responding. A repair technician can reseat this connector, which sometimes resolves dead spots without needing a full screen replacement.

When to replace the screen

If software troubleshooting and screen protector removal do not resolve dead spots, and especially if the dead spots appeared after physical damage, the screen assembly needs replacement. Modern phone screens have the display and digitizer fused together, so replacing the touch layer means replacing the entire screen assembly. The cost varies by phone model — flagship phones have more expensive screens than budget models.

Touchscreen repair help in Marion

If your phone has dead spots or unresponsive areas on the touchscreen, Marion Phone Repair can run a full touchscreen diagnostic to determine whether the issue is software, the screen protector, a loose connector, or a damaged digitizer — and replace the screen assembly if hardware repair is needed.