The light is dual purpose: It is only a warning light if it stays on. At other times, it flashes every time the shutter closes (at least, it does on my SQ-A) - useful when you are doing an 8 second exposure and you are not sure how long that is or using the mirror-lockup feature (the shutter itself, being a leaf shutter, is very quiet) - the flash lets you know you can wind on.
Can you wind the film on when the back is off the camera using the little manual crank (fiddly, I know). If so then this implies the film is loaded into the back correctly, iliminating that possible cause.
Although the film advance indicator does not move, is the film actually being advanced by the motor drive? The indicator may be broken but film is being advanced correctly. In which case return the film back to where you bought it.
Are you sure you have a 120 back and not a 220 version?
It may be worth searching out someone locally to you that has experience of this type of camera and see what they think if you still don't get anywhere...
Good luck, Bob.
Last edited by Bob F.; 02-28-2005 at 04:13 PM. Click to view previous post history.
Reason: schpellin mistayk