Thanks for reply Bill
I checked the N-S Switch of 807, it is on S, and there is no hum from the speaker, so probabely the amplifier is dead. I will open it and check.
The 810, 24 fps doesn't work, and the room for the N-S switch is empty, and there is no extra standard 8 film gate to be stored on the top of the shell. however there is hum when I turn the value.
So now, I will go futher to check the sound system.
About the film, I have only one film with sound track, but it didn't say sound film or tonfilm, however there is a brown sound track. Maybe the problem is the film?