What the symptom can mean
The starting controls, drive and closure arrangement can affect whether rotation begins. A hum alone cannot establish a failed belt or motor.
What responded first?
Say whether the controls accepted the programme and whether you heard a hum, click or silence. Include whether the drum had turned before the machine stopped and any final warning shown.
Describe without opening covers
Give the accessible model label and installation format. A still drum does not prove a broken belt. Leave the fitted appliance intact so the team can assess the actual request and access.