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
Stuck pixel vs dead pixel: how to tell them apart
Learn how a stuck pixel differs from a dead pixel, test your screen with solid colors, and find out whether a flashing fix is worth trying.
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Tests
Why can't my browser show laptop battery data?
Learn why a browser may hide battery status, how to check whether your laptop still reports it, and what to try when the Battery Meter is missing.
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Tests
How to tell if a printer problem is ink or settings
Print a test page to see whether faded, streaky, or wrong-color output comes from ink, paper, print settings, or the printer itself.
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Tests
Laptop loses charge while sleeping: what to check
Check how much charge your laptop loses overnight, separate normal sleep drain from a problem, and find the settings or hardware to check next.
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Tests
Why Wi-Fi bars can't tell you your real speed
Wi-Fi bars show a rough link to your router, not internet speed. Learn what to test instead and why signal strength and download speed can disagree.
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Tests
How to check each connected screen's resolution
See the resolution and scaling of every connected display, identify which screen is which, and set the right resolution in Windows 11 or macOS.
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Tests
Why does my keyboard type the same letter twice?
Find out whether a key is sticking, a repeat setting is too fast, or a connection is glitching, then follow simple checks to stop duplicate letters.
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Tests
Keyboard works in BIOS but not in Windows
If your keyboard works in BIOS but stops in Windows, test which keys register and work through the Windows settings, driver, USB, and app fixes.
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Tests
How to find a key that sometimes stops working
Test the key repeatedly, compare it with nearby keys, and narrow down whether a flaky keyboard key is caused by software, debris, or hardware.
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Tests
Laptop keyboard keys not working after a spill
A spill can damage a laptop keyboard even after the surface dries. Learn what to do first, then test which keys still register safely.
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Tests
When does laptop overheating need repair?
Learn which heat and slowdown symptoms point to a repair, how to run a browser stress test safely, and when to stop using your laptop.
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Tests
How to test a used laptop's storage performance
Check a used laptop's large-file and small-write speeds, understand the score, and spot signs that storage needs a closer look.