Mamiya 645 trouble

[unpopular]

The instructions say that the when using the winder you want it to be set to red square? I know. it's weird, and the instructions are a bit hard to follow.

But this is Mamiya, I wouldn't be surprised.

 

[Kieranjohn]

The instructions say that the when using the winder you want it to be set to red square? I know. it's weird, and the instructions are a bit hard to follow.

But this is Mamiya, I wouldn't be surprised.

That might be were I went wrong then shooting this in that mode with the grip may be causing the sync error, but shooting with the grip with it flicked to red square is still giving me the light with no shutter.
I have a PDF of the handbook myself and it's a bit hard to follow, I may have to drop this in somewhere for repairs.

 

[Mike_E]

Have you tried taking the batteries out and letting it sit for an hour or three? Maybe shorting out the battery contacts for a little while? Sometimes it takes a while for electronics to reset (reboot if you like).