If you are still getting +28v or so at the speaker connection then the NPN output device is defective...probably shorted..or leaky
i agree here is what i did but it sounds wierd but bare with me i removed the transistors again and tested them again and found i must have missed this or wasnt paying close attention but the 2sc3236 i had replaced the 1046 with read as follows
base = black lead from meter
collector = red lead from meter reading was nothing
emitter = red lead from meter reading was same
reversed leads red to base then ran test again
collector reading was 499 wit red lead to base black to collector
emitter reading was same with red lead to base black lead to emitter
now the other replacement was a 2sa1294 this is where it gets wierd i ran the exact test above but the readings were reversed
base = black lead from meter
collector reading with red lead from meter was 489
emitter was same
base = red lead from meter
collector and emitter reading nothing
its reversed from the other transistor that is suppose to be a replacement for it!!!
although the 1294 is a pnp thats probably why!!!