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
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.
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Tests
Bufferbloat test grade C or D: what can you fix?
A C or D bufferbloat grade can mean lag when your connection is busy. Learn how to retest, adjust router settings and tell where the delay starts.
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Tests
How to compare headphone response after changing ear pads
Compare headphone response before and after changing ear pads, with a repeatable browser test and checks to separate pad effects from fit or settings.
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Tests
How to compare connection stability across devices
Run the same stability test on each device, compare drops and jitter fairly, and find out whether the problem is your Wi-Fi or one device.
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Tests
Webcam looks stretched: aspect ratio or camera setting?
Find out whether a stretched webcam image comes from its aspect ratio, a camera setting, or the app. Compare the live preview and resolution, then fix it.