What Is a Dead Zone?
A dead zone is a specific region of your touchscreen that does not respond to finger input — even though the display itself still looks fine. The term comes from the way older touchscreens would lose sensitivity in localised areas, creating patches where touch events simply never fire.
Dead zones are distinct from a fully unresponsive screen. If your entire screen ignores touch, that is a different problem (likely a software crash, a driver fault, or a loose connector). A dead zone is partial — one corner, one strip, or one cluster of cells that is silent while the rest of the screen works normally.
Key distinction
Dead zones are about location. If touch fails everywhere at once, that's a different fault. Dead zones are predictable — they always fail in the same place.
Common Symptoms
You may have one or more dead zones if you notice any of the following patterns:
- Keyboard keys that never register — if the same letter always seems to miss, especially near a screen edge
- Swipe gestures that stop midway — a scroll or swipe that suddenly becomes untracked at one point along its path
- Buttons that require repeated taps — a specific part of the UI that takes three or four presses where others need one
- Navigation bar issues — gesture navigation at the bottom edge failing or requiring excessive force
- Consistent failure, not random failure — the problem is always in the same spot, not random across the whole screen
Watch out
Random touch failures across the whole screen are more likely to be ghost touch or an overloaded processor — not a dead zone. See our explainer on ghost touch if that sounds more like your situation.
What Causes Dead Zones?
The most common causes, in rough order of likelihood:
| Cause | Typical Location | Fixable Without Repair? |
|---|---|---|
| Debris under screen protector | Anywhere, often edges | Yes — remove and reapply protector |
| Air bubble under screen protector | Centre or edges | Sometimes — press out bubble or replace |
| Dirty or wet screen surface | Anywhere | Yes — clean the screen |
| Physical screen damage (crack, impact) | Near crack lines | No — digitizer replacement needed |
| Water or moisture ingress | Often lower portion of screen | Sometimes — dry thoroughly first |
| Faulty digitizer ribbon cable | Systematic strip or edge | No — professional repair required |
| Manufacturing defect | Variable | No — warranty claim recommended |
How to Confirm a Dead Zone: Step-by-Step
Before assuming hardware damage, rule out the cheap fixes. Work through these steps in order.
- Clean the screen thoroughly with a dry microfibre cloth. Oils, smudges, and moisture can reduce sensitivity — especially on capacitive screens that rely on skin conductance.
- Remove your screen protector entirely. Even premium tempered glass can create dead zones if improperly fitted, if there are air bubbles, or if it has lifted at the edges.
- Restart the device. Some touch driver faults clear on reboot. This takes 30 seconds and eliminates a software cause before you blame hardware.
- Run the Dead Zone Check test below on bare glass. The grid will reveal exactly which cells are unresponsive and give you a coverage percentage.
- Run the test a second time, slowly dragging a single finger across every area. Compare the results — consistent gaps in the same places confirm a genuine dead zone.
▶ Run the Dead Zone Check Now
Free, browser-based. Drag across the full grid — dead zones show as untouched cells. Takes about 30 seconds.
Reading Your Dead Zone Test Results
After completing the Dead Zone Check, you'll see a coverage percentage and a colour map of which cells were touched.
70% or higher coverage — likely no dead zones
Most untouched areas at this coverage level are simply spots you didn't drag through rather than true dead zones. Try the test again and deliberately slow down. If coverage increases, the screen is fine.
50–70% coverage — possible dead zones
Re-run the test and try to cover every area systematically. If the same cells remain dark across two or three attempts, those are likely genuine dead zones. Note their position on the screen — this will help you describe the problem to a technician.
Below 50% coverage — significant dead zone area
A consistent gap below 50% that persists across retests strongly suggests a hardware fault. Check whether the affected cells are in a predictable pattern: a strip near an edge often indicates a partially detached ribbon cable, while a central patch more commonly points to digitizer damage.
Tip
Screenshot or photograph the test grid before closing it — the visual pattern is useful if you need to describe the problem to a manufacturer's support team or file a warranty claim.
When to Seek Professional Repair
Try all the free steps above first. If dead zones persist after cleaning, removing the screen protector, and restarting, the fault is almost certainly hardware-level. No app, software update, or recalibration tool will fix a physically damaged digitizer or a faulty ribbon cable.
At that point, your options are:
- Manufacturer warranty — if the device is within warranty and the damage is not accidental, the manufacturer may replace the screen at no cost
- Manufacturer out-of-warranty repair — often expensive but uses genuine parts
- Third-party repair shop — usually cheaper; quality varies significantly, so ask about parts provenance and warranty on the repair itself
- DIY replacement — possible on some devices (particularly older Samsung and Google Pixel models) using a replacement digitizer and a guide from iFixit
Next Steps
If you've confirmed a dead zone exists, run the full 5-test suite to check whether other aspects of the screen are also affected. The Touch Accuracy and Swipe tests will give you a clearer picture of how usable the device still is while you wait for a repair.