Blog
Short, practical guides for checking your hardware and fixing what the tests find.
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Tests
Laser toner problem or printhead issue? How to tell
Use a printed test page to separate toner and imaging faults from inkjet printhead clogs, then choose safe checks and the right repair.
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Games
Why gamepad buttons show unexpected numbers
Find out why a gamepad test shows button numbers that do not match the labels, and check whether the controller, browser, or game is remapping them.
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Tests
Why power-saving firmware limits processor speed
Find out how power-saving firmware can cap processor speed, compare scores safely, and check settings before changing BIOS or power options.
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Tests
Why motion permission varies on iOS
Learn why an iPhone may show a motion prompt in one browser but not another, how to check Safari settings, and what missing sensor data means.
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Apps
Why audio waveforms differ at the same loudness
Learn why audio clips that sound equally loud can have different waveform heights, and how to compare peaks, average level, frequency, and dynamics.
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Tests
Why a VPN disconnects when idle
Find out whether your VPN idle drop comes from a tunnel timeout, device sleep, or a weak connection, then check the settings that keep it connected.
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Tests
MIDI controller connected but software sees nothing
Check whether your MIDI controller sends data, then trace why your music software cannot see it, from USB and browser access to app input settings.
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Tests
USB-C charger keeps renegotiating power? What to test
See how to test a USB-C charger and cable when charging speed changes, what a browser test can show, and how to tell normal power changes from a fault.
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Tools
Create a QR code for an apartment viewing brochure
Create a scannable QR code that opens an apartment brochure on a phone, then choose its destination, test it, and place it in print.
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Tests
Photo printer leaves tiny colored dots? What to test
Use a browser test page to separate printer defects from photo or paper problems, then check ink, print settings, and the path through the printer.
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Tests
Second monitor not detected? How to troubleshoot
Find out whether your computer, cable, adapter, or browser is missing the display, then try the quickest checks for Windows 11 and macOS.
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Tests
VPN kill switch not protecting browser traffic?
Learn how to check whether a VPN kill switch blocks browser traffic, spot IPv6 or WebRTC leaks, and fix settings before using sensitive sites.