DeskProof Lab
YOUR DESK. UNDER OBSERVATION.

Less guessing.
More knowing.

A practical lab for your keyboard, mouse, controller and screen. Observe real input, compare sessions and keep the evidence.

Find my test ↗Open Device Lab →
08working tools07practical guides0accounts needed
DESKPROOF / LAB 02ILLUSTRATION
01 / INPUT⌨
02 / AXIS
03 / DISPLAY
Observe → compare → understand↗

Interface illustration. Your real readings appear inside each test.

No installationNo device-data uploadsSave only when you chooseNo invented health score

Start with the symptom

Scroll jumps or reversesOne press creates extra clicksA dot stays dark or bright
01 / CHOOSE YOUR INSTRUMENT

What needs a closer look?

Every test includes its method, its limits and a useful next step.

Keyboard

Keyboard tester

See which keys reach your browser. Check held combinations and distinguish automatic key repeat.

OPEN INSTRUMENT ↗Mouse

Mouse test

Check left, right and middle buttons, extra buttons and wheel events in one place.

OPEN INSTRUMENT ↗Mouse

Double-click test

Inspect intervals between left-button presses with an adjustable threshold.

OPEN INSTRUMENT ↗Mouse

Mouse wheel test

Inspect up/down wheel events, horizontal deltas and browser delta units.

OPEN INSTRUMENT ↗Controller

Gamepad tester

Read controller buttons, trigger values and raw stick axes exposed to the browser.

OPEN INSTRUMENT ↗Controller

Stick drift test

Sample resting stick offsets for five seconds, with raw values and no invented fault verdict.

OPEN INSTRUMENT ↗Display

Dead pixel test

Inspect solid white, black, red, green and blue screens at your own pace.

OPEN INSTRUMENT ↗Display

Backlight bleed test for LCD monitors

Use a black background to compare visible brightness at normal viewing conditions.

OPEN INSTRUMENT ↗

02 / CONNECT THE OBSERVATIONS

One result is a clue.
Two make a comparison.

USB or Bluetooth? Before and after a setting change? Save a labelled snapshot, repeat one test and compare the observations side by side.

Build my inspection ↗
THE COMPARISON RECIPE
ASave a baselineDevice + connection + conditions
↓ Change one condition
BRepeat the same actionSame test, same duration, same pace

Differences are observations. You decide what to investigate next.

03 / FOLLOW THE SYMPTOM

From “something is off”
to a repeatable check.

Buying used? Open the checklist ↗
01A key is missingA key does not work: isolate the input path02One press, two clicks?Mouse double-clicking: build a controlled comparison03Scrolling jumps or reversesMouse scroll jumping: what to check and how to compare04The controller is invisibleController not detected in the browser05A stick moves by itselfStick drift and deadzones: interpret the same reading06A fixed dot on screenDead pixel or stuck pixel: what can you observe?07Light patches on blackBacklight bleed or glow: make the visual comparison useful