Just had one fixed; apparently the motors go open circuit on failure and don't display an error.
New motor is ~£100; we got ours mended by http://www.repairandprotect.co.uk for £130 labour + parts + 12mo guarantee.
For reference, the dishwasher is equivalent to
BELLING IDW 604
BELLING IDW 450
NEW WORLD DW 60
PRIMA LXP 600
PRIMA LPR 450
STOVES 600 DWT
STOVES 450 DW
google oV31erqg for a service manual
foobie, December 2012