Very odd that motor and lights pack up at same time this is probably no more than a loose wire that may have worked loose.
Switch off and unplug from mains inspect wiring make sure there are no breakages at terminals.
The fridge as with the freezer are one of the most reliable of electric appliances and very rare for a motor to pack up. And even if the motor did pack up you would still have lights. If in doubt call a qualified engineer to take a look. Bare in mind this can be expensive.
Make sure that you call a registered engineer as there are many who will rip you off and make the job sound more then what is probably wrong.
carlito corway
June 2008