I have a similar issue and getting about 1.5v on the gates of the BS170s.? I'll check with a scope as well, but I guess this points to IC5?? I have one on order, but before attempting my first 14 pin SMD replacement, it'd be good to know if that's the likely cause!
btw - I've already replaced the BS170s and C37, rewound T1 and reflowed T1 and L14 pads.
ZL1SGS