Indesit wlb 111 washing machine flashing light. Won't run?

Running Ok then vibrated badly. Then stopped with 'on/off door lock' led flashing fast. Tried taking mains power off and ' re booting' but no go. Checked drain point and removed several coins, pump felt free to rotate. Quick visual check inside shows nothing obvious. Any suggestions ?
Machine now about 5 years old. Could it be motor brushes or something similarly simple ?

Grandad John
July 2013