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 CPU architecture labels can mislead online
A website's CPU architecture label may describe the browser or compatibility layer, not the chip. Learn what it means and how to verify it.
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Tests
Audio coming from the wrong output? How to find it
Find out whether audio is going to the wrong device, whether left and right channels are swapped, or whether an app is choosing a different output.
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Tests
Why counterfeit SD cards still format successfully
A format can finish even when an SD card lies about its size. Learn what formatting checks, how to verify real capacity, and what to do if it fails.
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Tests
Why turning off WebRTC breaks video calls
Learn why blocking WebRTC can stop browser calls, how to restore camera and audio access, and how to check for a VPN-related IP leak.
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Tests
Why horizontal scrolling fails on a mouse wheel
Find out whether your mouse, app, or settings are blocking horizontal wheel scrolling, then try fixes for Windows 11 and macOS.
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Tests
Why does my device keep starting and stopping charging?
Compare charging rates in a browser, then narrow down whether a cable, charger, port, heat, or battery setting is interrupting power.
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Tests
How to check VPN leaks on a dual-stack connection
Test whether your VPN exposes your home IPv4 or IPv6 address, learn what WebRTC results mean, and fix leaks without guessing.
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Tests
How to check a subwoofer enclosure for loose panels
Use a slow bass sweep to find panels that buzz, isolate the source, and decide whether to tighten a joint, change placement, or get a repair.
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Tests
How to compare power modes with a browser CPU score
Compare CPU scores across power modes with the same browser test. Learn how to control heat, background apps, and charging for a fair result.
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Tests
Cross-shaped mark on screen: what it means
A fixed cross on your screen may be a stuck pixel cluster, an overlay, or panel damage. Learn how to identify it and what to try next.
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Tests
Mouse buttons stop responding when the battery is low
Find out whether low power is interrupting your wireless mouse, how to test its buttons, and what to check before replacing the mouse.
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Tests
Why video playback affects CPU test results
See why video playing in another tab can change your Processor Test score, how to retest under fair conditions, and which system settings to check.