Blog
Tests
Guides for testing your keyboard, mouse, screen, sound, network and other hardware, and for fixing what the tests find.
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Tests
Tablet ignores touch near charging port: what to check
Find out whether a charging cable, case, screen protector, software setting, or damaged digitizer is causing a tablet's touch dead zone near its port.
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Tests
Wi-Fi latency when Bluetooth audio plays
Measure Wi-Fi response time, jitter, and drops before and during Bluetooth audio, then tell interference from normal network variation.
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Tests
How to check File System Access API support
Check whether your browser exposes the File System Access API, what each result means, and how to verify file picking on the site you use.
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Tests
USB drive fast at first, then slows down
See why a USB drive can start fast and slow down during a transfer, how to measure sustained read and write speed, and what to check next.
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Tests
How to check sensor response after a system reset
Check motion, compass, light, location, and vibration after a system reset, then find out whether permissions or hardware are causing a failure.
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Tests
Why a router in a cabinet creates weak Wi-Fi areas
Learn why a router hidden in a cabinet can leave weak Wi-Fi areas, how to map the problem room by room, and which placement changes to try first.
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Tests
How to test a document camera before remote lessons
Check framing, focus, lighting, resolution, and permissions before class, then find out whether a problem is in the camera, browser, or lesson app.
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Tests
Compass heading drift: what it means for map directions
Learn why a phone compass heading drifts, how to test it in your browser, and what to change before trusting map directions.
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Tests
What a moving accelerometer graph can tell you
Learn what a moving accelerometer graph means, how to read changes as you tilt or move a device, and what it cannot prove about the sensor.
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Tests
Voice audio fluctuates in volume: what to check
Find out whether changing voice volume comes from the microphone, automatic gain, noise suppression, or a call app, then try the fixes in order.
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Tests
Why storage benchmarks vary between browser runs
Learn why browser storage scores change between runs, how to repeat a fair test, and when a low result may point to a real drive problem.
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Tests
What to check before trying flashing pixel patterns
Check whether a screen spot is really a stuck pixel, prepare your display, and decide if a flashing pixel pattern is safe to try.