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
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.
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Tests
How to check a classroom computer lab efficiently
Use one repeatable pass to check keyboards, screens, cameras, audio, and network across a classroom lab, then sort faults by what needs attention first.
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Tests
Mouse switch or software macro? How to tell
Find out whether unexpected or repeated mouse clicks come from a worn switch or a software macro, then test the mouse and isolate the cause.
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Tests
Camera preview not working after a browser update?
Check whether your camera preview still works after a browser update, then isolate permission, camera selection, and compatibility problems.
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Tests
How to test loaded delay on 4G and 5G
Measure how much 4G or 5G latency rises during downloads and uploads, understand the Bufferbloat grade, and find the next thing to check.
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Tests
Mouse buttons work but drag-and-drop fails
Find out whether failed drag-and-drop comes from the mouse, a system setting, or one app, then try the right fix without replacing working hardware.
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Tests
What a browser's GPU renderer label means
Learn what a browser's GPU renderer label identifies, why it may show a generic name, and how to check whether your graphics hardware is being used.
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Tests
Why a tablet reports sideways orientation on a stand
Learn why a tablet can report sideways orientation on a stand, how to check its sensors in your browser, and when rotation settings are the cause.