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
Why thin colored outlines appear around text
Find out whether colored fringes around text come from your display, scaling, sharpening, or a cable, and what to change first.
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Tests
How to test a refurbished school Chromebook keyboard
Test every key, modifier and top-row shortcut on a refurbished school Chromebook, then use the results to spot wear, settings issues and keys to repair.
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Tests
Why WebGL benchmarks can't identify defective VRAM
Learn what a WebGL graphics test measures, why a normal score cannot rule out bad VRAM, and how to separate memory faults from driver or heat problems.
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Tests
How to check a USB keyboard after liquid cleaning
Check every key after cleaning, spot missed or repeated presses, and find out whether the keyboard is dry, has residue, or needs repair.
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Tests
How to tell if a new router fixed bufferbloat
Compare bufferbloat results before and after replacing your router. Use the same device and connection conditions to see whether latency under load improved.
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Tests
Speakers crackle only at low volume? What to test
Find out whether speakers crackle at low volume because of the audio source, settings, cable, or speaker, then test each cause without turning them up too loud.
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Tests
How to check an SD card before a school concert
Check an SD card's write speed, recording space, and camera compatibility before a school concert, then verify it with a short test clip.
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Tests
CPU throttling almost immediately: what to test
Check whether a browser-based load test reproduces an instant CPU slowdown, then separate heat, power limits, background load, and cooling problems.
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Tests
How to test a lapel mic before a lecture
Check a lapel mic's input, placement, clothing noise, and recording level in your browser, then fix problems before students arrive.
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Tests
How to test modifier keys for design work
Check Ctrl, Shift, Alt, and Command before a design session, then find out whether a missed shortcut comes from the keyboard or your settings.
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Tests
Why laptop scaling changes with the lid closed
Find out why laptop display scaling changes when you close or reopen the lid, and fix settings that make text or windows look different.
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Tests
What to check before taking a MIDI keyboard on stage
Check keys, velocity, pedals, knobs, and MIDI connections in your browser before load-in, then use a practical checklist to catch stage problems early.