Bias is the difference between emitter and base, not just the base voltage. SO with the base esentially at ground for DC, look at the schematic. Your emitter then must be negative to turn on the Q1.
Note the top and bottom halves of this amp are the SAME, not opposite polarities as usual. The upper side acts like a plain single ended amp, then the OUTPUT from the speaker winding becomes the signal for the bottom side. That signal is inverted from the input signal, so the NFB acts more or less as a phase inverter.
ANyway, over left, R4, R5 are the emitter resistors for Q1,2. The join, but not at ground, they are wired up and over to the right with the current control and H supply of -8.9V. H comes from Q26 and ultimately from the -30v rail.
So... do you have voltage H at that control? At the joint of R4,5? My first suspect is an open R4, but surely a missing supply there would do it too.
Note by the voltages on the schematic the top and bottom halves mirror one another, so the voltages are all the same. Use Q2 side to compare.