Blog
Short, practical guides for checking your hardware and fixing what the tests find.
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Tests
Computer readiness check for telehealth appointments
Check your camera, microphone, speakers, browser permissions, and connection before a telehealth visit, then fix common problems before the appointment.
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Tests
What to test after changing laptop memory configuration
Check whether your laptop recognizes a memory change, compare RAM speed before and after, and learn what a browser benchmark can and cannot confirm.
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Tests
WebGL disappeared after a browser update?
If WebGL stopped working after a browser update, use a graphics test to separate a browser setting, driver change, or compatibility issue from a GPU fault.
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Tests
How to inspect a printer after moving offices
Check print quality, paper handling, and connectivity after an office move, then narrow down whether a fault is in the printer, setup, or network.
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Tests
How to make repeatable home noise measurements
Use the same microphone, position, room conditions, and timed checks to compare home noise readings without mistaking normal variation for a change.
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Tests
Colored dot only visible at minimum brightness?
Learn why a colored dot may appear only at minimum brightness, how to check whether it is a pixel defect, and what to try before seeking repair.
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Tools
How to identify rows with missing postal codes
Find blank and placeholder postal codes in a CSV, sort the rows to bring gaps together, and check them without losing leading zeros.
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Tools
How to sample a color from an image in a browser
Pick a color from an image on your screen and get its HEX, RGB, or HSL value. Learn how to sample accurately in a browser without installing software.
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Tools
Why some countries have half-hour time zones
Learn why India, Iran and other places use half-hour offsets, how longitude and history shape official time, and how to compare local clocks.
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Tests
Webcam only works on USB 2: what to check
Check whether a port, cable, hub, or webcam is limiting the connection, then compare your camera’s reported resolution and frame rate in a browser.
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Tools
How to check color differences after image conversion
Compare matching points in your original and converted images, read their color values, and tell normal compression changes from a conversion problem.
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Tests
What to check after a laptop BIOS update
Check boot, power, firmware settings, and processor speed after a laptop BIOS update. Learn which changes are normal and which need attention.