Tapcheck · Guides
Hardware guides
How to test, understand and fix your hardware. Every guide comes with a free test that runs in your browser.
Input & Peripherals
How to fix controller stick drift
Confirm stick drift on a PS5, Xbox or Switch controller, then fix it: firmware updates, cleaning, deadzones and when a repair is the only option.
Read the guideHow to fix a mouse that double clicks
Your mouse double clicks when you click once. Confirm the fault with a double click test, rule out settings, then clean, adjust or replace the switch.
Read the guideHow to improve your typing speed
Take a typing speed test, see what a good WPM is and how it's calculated, then type faster with touch typing, better posture and a daily practice plan.
Read the guideWhat is a good CPS?
Take a CPS test and see what a good click speed is, how jitter and butterfly clicking compare, how to click faster and whether it can wear out your mouse.
Read the guideMouse DPI explained
What mouse DPI means, how to check your real DPI with a DPI test, how it differs from sensitivity and polling rate, and the settings gamers commonly use.
Read the guideHow to improve your aim
Use an aim trainer to measure your aim, then improve it with a warm-up routine, a steady sensitivity, the right monitor settings and a weekly plan.
Read the guideController vibration not working? How to test and fix it
Run a controller vibration test in your browser to see if the rumble motors work, then fix PS5 and Xbox rumble on PC: game settings, Steam Input, cables.
Read the guideStick circularity error explained
What a joystick circularity test measures, what a good result looks like, how it differs from deadzone and drift, and how to get rounder thumbstick output.
Read the guideMIDI keyboard not working? How to test and fix it
MIDI keyboard not detected? Run a MIDI keyboard test in your browser, then fix cables, drivers, velocity, stuck notes and a reversed sustain pedal.
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Audio & Acoustics
Headphones only playing in one ear? How to fix it
Sound only coming from one side of your headphones? Test each channel, check balance and mono audio, then find out if the cable or earbud is faulty.
Read the guideMicrophone not working? How to fix it
Fix a microphone that isn't working on Windows or Mac. Test the mic, pick the right input, check privacy settings and app settings, then rule out hardware.
Read the guideHearing range by age: what's normal and how to test it
What frequencies you can hear at your age, why the top end falls over time, and how to run a hearing test online safely with headphones and a low volume.
Read the guideDecibel levels chart: how loud is too loud?
Decibel levels of everyday sounds, how loud is too loud, and how to measure noise with an online decibel meter: dBFS vs dB SPL and calibrating your mic.
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Display & Graphics
Why is my 144Hz monitor only showing 60Hz?
Your 144Hz monitor is stuck at 60Hz. Check the refresh rate setting, cable, port and graphics card connection, then confirm the fix with a refresh rate test.
Read the guideWhat is my screen resolution? Resolution and scaling explained
What is my screen resolution? Check it in your browser, then learn why scaling makes it look lower, what 1080p, 1440p and 4K mean, and how to change it.
Read the guideMonitor ghosting and overdrive: how to test and fix it
Run a motion blur test to spot ghosting, blur and overdrive halos on your monitor, then fix them with overdrive, refresh rate and blur reduction settings.
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System & Performance
How to check a used laptop before buying
A 15-minute checklist for testing a second-hand laptop before you pay: screen, keyboard, trackpad, battery, speakers, mic, webcam, ports and specs.
Read the guideHow to benchmark a PC in your browser
Run a CPU benchmark online with nothing to install. Learn what single-core and multi-core scores mean, what skews them, and how to compare PCs fairly.
Read the guideGPS not accurate? Why it happens and how to fix it
Why your phone's GPS is inaccurate and how to fix it. Run a GPS test, read the accuracy radius, check location settings and calibrate the compass.
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Checkups
Tests that belong together, in order. Start at step one and each test links to the next.
Gaming setup check
Mouse, keyboard and monitor, tested in the order a competitive player would.
Mouse test → Mouse polling rate test → Mouse DPI test → CPS test → Aim trainer → Reaction test → Keyboard ghosting test → Refresh rate test → Monitor motion blur test
Start with the mouse testController check
Buttons, stick drift, stick circularity and rumble motors.
Gamepad test → Stick circularity test → Controller vibration test
Start with the gamepad testNew monitor check
Run these while you can still return the monitor.
Dead pixel test → Backlight bleed test → What is my screen resolution? → Refresh rate test → Monitor motion blur test
Start with the dead pixel testVideo call check
Make sure people can see and hear you before the meeting.
Microphone test → Webcam test → Sound test → Network test
Start with the microphone testHeadphone & hearing check
Channels, frequency response, your hearing range and the room's noise level.
Left right audio test → Sound test → Hearing range test → Decibel meter
Start with the left right audio testKeyboard check
Every key, rollover, then your speed.
Keyboard test → Keyboard ghosting test → Typing test → Spacebar counter
Start with the keyboard testPhone check
Sensors, touch screen, location and battery on a phone or tablet.
Smartphone check → Touch test → GPS & compass test → Battery check
Start with the smartphone checkPC performance check
Specs, then CPU and GPU benchmarks, then the full diagnostic.
System specs → CPU benchmark → GPU benchmark → Full diagnostic
Start with the system specs