Hasselblad PME meter dials not working

Hello everyone,

I have a Hasselblad PME meter, the original one I believe. The meter is responsive to light, and reading changing with light level, however does not change with the ISO or aperture dial.

Anyone familiar with this problem and any suggestion how I should tackle this? Thank you.

I would not force anything. Take it to a Hasselblad repairman. I have used mine for years.