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Hardware Test Guides

Each guide walks one problem end to end: how to connect the device, which numbers matter, what the verdict means, and what to do about it. Test guides tell you whether something is wrong; fix guides tell you what to do next. Pick the one that matches your gear.

Start here

Mouse, Keyboard & Controller Faults: The Full Path

Not sure which device is failing? This hub maps the symptom to the right test, then to repair, replace or return.

Methodology

How We Test Hardware — Methodology

The verdict model, why thresholds are configurable, how much data a result needs, and what browsers can and cannot see.

Controller guides

How to Test Controller Drift (PS5, Xbox, Switch Pro)

Connect the pad, let it rest, and read the raw axis values a warranty agent will ask for.

Stick Drift Fix: Clean It or Replace It?

The decision path from confirming the fault to a permanent module swap, warranty math included.

Keyboard guides

How to Test Keyboard Chatter (and Find the Bad Switch)

Tell a failing switch apart from software ghosts, one key at a time, in about ten minutes.

How to Fix Keyboard Chatter (Clean, Swap or Claim)

Cleaning that buys weeks, hot-swap swaps that take five minutes, and the warranty rule to check first.

Keyboard Rollover and Ghosting, Explained

Why a keyboard drops a key, what 6KRO really means, and which limits are worth replacing hardware over.

Mouse guides

How to Test Your Mouse for the Double-Click Bug

Twenty clicks per button, then read the gap values that separate a worn switch from interference.

How to Fix the Mouse Double-Click Bug

Rule out settings, clean the switch, replace it — and know when the warranty is worth more than DIY.

How to Check Your Mouse DPI (Without Special Hardware)

The 360° method, native versus interpolated DPI, and how to keep your sensitivity on a new mouse.

Other device checks