Sony Sound Bar - SA-WCT380 - No Sub Woofing.

[Turnip]

Hi folks,

Have this sound bar - OK apart from the Sub Woofer which doesn't function. Had a look where F931(2.5AT) was O/C.
Replaced but no secondary voltages. Might be STR Y6766B but unsure as it hasn't popped anything.

Found schematic so attach - Chris.