Goodmans gtvl32w22hd will not switch on

[g6cwu]

Hi, have this set and changed psu from fsp204-2f01 to fsp204-2f02. Set now only lights red on off light and stays on not blinkink,will not switch on. I have checked volts and pin 3 on cns2 originally cn3 12v side on psu has 1.35v (power on off signal) all other pins have their respective 24+ 12+ and grnd. Anyone have any ideas??
Would be very gratefull Rob