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 external drives slow down through USB hubs
Learn why an external drive slows down through some USB hubs, how to compare its speed, and which cable, port, or power fix to try.
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Tests
How to test a used laptop for overheating
Run a short browser stress test, watch for performance drops, fan noise, or shutdowns, and learn when a used laptop may need cleaning or repair.
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Tests
How to detect CPU slowdown without temperature readings
Find out whether your computer slows down under sustained load without a temperature readout, using a browser test and repeatable checks.
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Tests
How to test whether laptop position affects cooling
Compare the same laptop load on a desk, stand, and other positions to spot blocked airflow or heat-related slowdowns, without relying on touch alone.
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Tests
Hot laptop: clean it or add more RAM?
A hot, slow laptop may need cooling, not more memory. Test for heat-related slowdowns and check whether RAM is really the limit before upgrading.
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Tests
Does reducing screen brightness save battery?
Compare battery drain at different brightness levels, learn when dimming makes a noticeable difference, and separate screen use from other power loads.
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Tests
How to observe laptop battery drain during an online meeting
Measure your laptop's battery before, during and after a video call. Learn how to read the drain rate and tell normal use from a battery issue.
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Tests
Why battery wear and current discharge rate differ
Battery wear describes capacity lost over time, while discharge rate shows power use right now. Learn why they differ and how to check both.
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Tests
How to retest a computer after a failed driver install
Retest the affected hardware after a failed driver install, separate a driver problem from a device fault, and choose the right next check.
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Tests
What a browser-based hardware check cannot detect
Learn what a browser-based hardware check can confirm, what it cannot see, and how to follow up when a test reports a problem.
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Tests
Why your keyboard types symbols instead of letters
Find out whether a stuck modifier, keyboard layout, or remapping is making your keyboard type symbols instead of letters, then fix the cause.
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Tests
How to detect a key that stays pressed
Use a browser keyboard test to check whether a key keeps registering after release, then find out whether the cause is dirt, software, or hardware.