Hi, Bob! Same problem. The barrel holding the filter apparently got unscrewed while trying to tighten my hood/shade (clockwise while facing the lens). Then by screwing the barrel back on (yea, this is counterclockwise) it seems overtightening of the barrel then causes the problem.
The slow blinking simply indicates that the lens is set between OFF and 28mm.
"Fix it" by loosen the barrel by first extending it (easier to grip it) by setting the focal length to 85mm and then turning it clockwise until you can shut off the camera again.
This is not a repair. The camera is left with a loose barrel, it can unwind and drop off, but the camera is working . Don't know how to avoid this.
To avoid any further damage the filter should never be screwed in any direction without tightly holding the barrel in place at the same time. I bet this is a common problem with this camera.
Best
Kåre Bondeson