Laptop microphone not working: step-by-step checks
Separate permission, input-selection and real signal issues in a few minutes.
5 min readRead guide →
Understand your device better.
Practical, measurable guides for common computer, mobile and peripheral problems.
Latest guides
Computer and mobile device problems
8 detailed guides
Webcam not working? Camera permission and picture issues
Diagnose black video, permission errors and poor image quality in the right order.
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Keyboard keys not working: test key events and focus
See whether a key produces an event and whether the issue is in software or hardware.
4 min readRead guide →
Controller stick-drift test and deadzone setup
Measure resting stick offset in the browser and interpret the result correctly.
6 min readRead guide →
How to test 60 Hz, 120 Hz and 144 Hz refresh rates
Measure browser rendering cadence and compare the selected display mode with expectations.
5 min readRead guide →
Dead-pixel test: inspect your display safely
Visually inspect the panel with clean white, black, red, green and blue surfaces.
4 min readRead guide →
Check camera, microphone and speakers before a video call
Verify your device with a two-minute checklist before an important meeting.
5 min readRead guide →
Computer and browser checklist before an online exam
Systematically verify permissions, inputs and display settings before the exam begins.
6 min readRead guide →
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