Run the check
Run the same moving pattern at a fixed speed and refresh setting.
Compare a second motion source and the monitor's available response setting.
Look for a dark trail, bright halo, or double image separately.
Read the result
A bright opposite-colored halo after aggressive response settings suggests overshoot.
Limits and next step
The browser cannot measure the panel's pixel transition time directly.
Repeat the check after changing one setting or connection. Keep a record of what changed before deciding whether the device needs service.