- Close the game and SRS, then power the platform off.
- Restart Windows. If an e-Break is fitted, disconnect it from the control box for this diagnostic test.
- Connect the controller directly to a rear motherboard USB port—do not use a hub initially. Try one known-good, short USB cable and one other USB port.
- Power on and check Windows Device Manager. Record whether one COM port appears (most platforms) or two appear for a 6DOF system.
- If a COM port appears, launch SRS and select the correct platform/port; run the SRS movement sliders with the game closed.
- If no COM port appears, try a different power outlet and known-good power cable. With power off and motors disconnected, inspect the motherboard LED only if comfortable opening the box and the current DOF manual permits it.
- If the motherboard LED is off after the documented power-button check, stop and submit a ticket to DOF Reality Technical Support here: https://dofreality.freshdesk.com/support/tickets/new