There really is noting in the BIOS about lower power modes
powercfg -A says S3 supported. S1 and S2 not available
powercfg -H ON makes no difference

Interestingly Hibernate has disappeared from the shutdown menu but Sleep behaves like Hibernate (apart from not turning off the computer) So Click Sleep and
- screen goes back everything stops apart form the fan and the inidcator lights
- Press and hold power to turn it off
- Press power to start up and it says Resuming - and does indeed return to where it was.'