Laser module diode does not turn on, but fan turns

Laser module diode does not turn on (light up), but the fan turns when in laser engrave mode using firmware and studio version below and several combinations of previous versions. Is my laser module faulty?

uArm Serial No.: C8FD19405607
Firmware Version: 4.3.2
Operation System: Win8.1
uArm Controlling Method: uArm Studio 1.1.21, core 1.0.1


It may faulty, please contact with your product SN or order number for help.