DeviceDIYOpen the touchscreen test on your touch device, drag across the grid and watch cells respond. Repeat suspect areas with a different finger and orientation, then compare behaviour in another app.
Start with the symptom, not a guess
A touchscreen test can show touch events the browser receives and reveal areas that appear consistently unresponsive. It cannot prove the display digitiser is fully healthy, and browser gestures may intercept some interactions.
Use the free DeviceDIY tool to observe what reaches your browser. Compare the result with another application when necessary, and change one setting at a time so you can tell what solved the problem. A browser test offers useful evidence; it is not a substitute for professional hardware diagnostics.
Step-by-step troubleshooting
Remove common physical barriers
Dry the screen and your fingers. If safe for your device, check whether a damaged screen protector or case edge is preventing normal contact.
Open the test on the actual touchscreen
A mouse simulates pointer interaction but cannot establish touch-panel performance. Use your finger directly on the phone, tablet or touch laptop.
Sweep the full testing area
Drag slowly across rows and columns. A repeatable gap can be more informative than a single missed touch.
Try one finger and then multiple fingers
If supported by your device and browser, test more than one contact. Some system gestures can take priority over browser events.
Rotate or restart the device
Repeat the same test after orientation change or reboot to see whether the pattern persists.
Check other applications
If a specific part of the screen fails consistently across apps and after cleaning, seek manufacturer diagnostics or service advice.
What your test results actually mean
Cells respond across the pad
The browser received touches in those regions, but precision and pressure sensitivity are not necessarily verified.
Repeated blank zone
May suggest a digitiser issue, blocked area or competing system gesture; repeat outside the browser.
Mouse works but touch does not
The webpage may be functional while touchscreen input or browser touch handling is unavailable.
Multi-touch not captured
Browser support, accessibility settings or device limitations may be involved.
What an online test cannot prove
Web pages are limited to the information exposed by the browser, operating system and your permission choices. DeviceDIY cannot directly inspect internal circuits or guarantee that hardware will perform correctly in another application. Some tests require you to look, listen or touch the device and confirm what happened.
Privacy and safety: Only grant camera or microphone permission when you intend to use that test. Avoid excessive sound volume, never force a faulty connector and follow the manufacturer’s safety guidance before attempting physical repairs.
Frequently asked questions
Can a website detect a dead touchscreen area?
It can reveal regions where no touch events reach the page, but a second application or manufacturer test is needed to support a hardware diagnosis.
Will this work on iPhone and Android?
Touch-event support varies by browser. The page must be opened on the device being tested, and some edge gestures may remain controlled by the operating system.
Can a mouse replace a touchscreen test?
No. Mouse events are not proof that the touch sensor is working.
Official references and further reading
For system permissions and browser behaviour, use the official documentation below. Menus and controls can vary by device and software version.
Keep troubleshooting
Ready to check your device?
Use the free interactive test first, then return to the guide if something fails.