Samsung PS42Q97HD power problem

[Turnip]

Hi folks,
Have set in using BN44-00194A power board where QS801 and QS802 appear OK and with no dries but VS1 doesn't power up though VS2 does and sound is OK. Checked and there's some 400V on QS801 but nothing on QS802 so suspect a drive problem maybe - Any thoughts ? - Thanks - Chris.

Realise I've put it in the wrong section but the other one seems to have vanished at the moment.