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 dual-monitor layout after a GPU update
Check which monitors appear after a GPU update, compare resolution and scale, and restore the right screen order and main display in Windows or macOS.
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Tests
How to check battery drain with a second monitor
Measure laptop battery drain with a second monitor connected, compare it with one-screen use, and learn what the rate can and cannot tell you.
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Tests
Why a cracked speaker surround buzzes during bass
A cracked speaker surround can vibrate against the cone during bass. Learn how to isolate the buzz and decide whether to repair or replace it.
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Tests
How to evaluate battery use during screen recording
Measure how screen recording changes laptop battery drain with matched idle and recording tests, and learn what browser battery readings can show.
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Tests
Why bufferbloat gets worse during uploads
Learn why your ping jumps when an upload fills the connection, how to test bufferbloat, and which fixes can reduce delay during calls and games.
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Tests
How to check if your stereo channels are reversed
Play left and right test tones to find out whether your speakers or headphones send each stereo channel to the wrong side, then fix the cause.
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Tests
How to check a display for uneven white balance
Check whether a screen's whites vary across the panel, separate viewing-angle and setting effects, and decide what to adjust next.
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Tests
How to spot an SD card that overwrites old data
Learn why an SD card can overwrite older files, how to check its real capacity safely, and what to do before you trust it with more data.
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Tests
How to compare two routers for brief disconnects
Compare routers under the same conditions, check lost requests and dropouts, and work out whether brief disconnects come from Wi-Fi or your ISP.
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Tests
How to test a projector as a second screen
Check whether your computer detects the projector, sends it the right display mode, and shows a clear image when you use it as a second screen.
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Tests
Why a USB-C dock changes monitor scaling
Find out why a USB-C dock changes monitor scaling, compare each screen's resolution and scale, then restore readable text on Windows or Mac.
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Tests
What charging tests can't tell you about electrical safety
Learn what a browser charging test can measure, what it cannot prove about electrical safety, and when to stop using a charger or cable.