It is either your power cable, cable rewind mechanism or your motor.
Try switching it on, and wiggling the lead near the plug and see if it fires up. If it does, remove the moulded plug and fit a standard plug.
If not, likely suspect is the motor or the cable rewind mechanism. Neither are an amateur job. If you are in the UK, you could send it to
Manchester Dyson for either to be fixed. Carriage will cost you about £10 each way. A motor replacement will cost around £65 and a cable rewind mechanism about £45-£50.
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