HFMA-2 no sound

Hi, I have a Seeburg 101 which takes all selections but no sound comes through the speakers.
I recapped the amp and changed all resistors that were out of range. I also have a redhead cartridge with new styliis ( resistance is 1.7 k ).
Even when I pull the mute plug comes no sound and if I stick a bare wire in the audio input socket there is no hum.
I measure 390 V.D.C instead of 410 V.D.C. at the 5U4GB and 375 V.D.C. instead of 395 V.D.C. at the 1.5 HVS choke. All tubes are new and lit.
Thanks Lars

Lars,
Selections have nothing to do with the audio---
The tubes may be new, but are they good ? Are they making good contact in the sockets ?
Are all of the rotary or slide switches, VC, and plugs, making good contact ? Speaker(s) good ?
Your voltage readings, while low, are probably OK, as you are probably using a different meter--
That's all I can think of at the moment, you will need to trace the signal thru the circuits to find it, if not found above--
Ron Rich

Problem solved. Someone soldered the pins 1 and 2 of the mute plug together
Sounds great for a mono box.
Lars