Remove the lens from camera.
Look inside pass the mirror, how is the shutter?
Should be flat with the film with no warp or opened shutters.
Or try this:
Lens out, set camera to M (manual mode).
Shutter set at 1 (One Second).
No flash.
800 ISO
Lnes drive pin (recessed) fully into the body, not S or C.
Fresh batteries.
Set self timer on.
Press shutter button.
Camera should blink and then shutter should be tripped.
This will also check to see if you have enough power for min. of one shot.
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