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MODEL-SPECIFIC DIAGNOSTIC

Diagnostics / BenQ / RP03

No touch control from an external Windows computer

Video from Windows is present, but touch input is not returned to the computer.

Applies to this documented familyRP6503, RP7503, RP8603

Likely causes, most useful checks first

  • Missing USB touch-data connection.
  • Touch USB connected to the wrong paired input.
  • USB extension or dock failure.
  • Host operating-system detection problem.

Safe checks

01

Separate panel touch from PC touch

Test touch in the panel's own interface, then return to the Windows input.

What the result means: Working local touch points toward the external USB path.

02

Verify both signal paths

Confirm that video and the labelled touch USB connection both run between the RP03 and Windows computer.

What the result means: Restore the missing external connection and retest.

03

Remove intermediate devices

Use a short known-good direct USB cable instead of a dock, faceplate or extender.

What the result means: A successful direct test identifies an external cabling/accessory issue.

Sources

Reviewed under the BoardFaults safe-external-check policy · risk class: low · updated 2026-09-03