Mamiya 7II meter problem

[fbf]

Seems like I am having issue with the metering system. The "LT" kept flashing no matter what shutter speed/ISO setting is. I have tried 3 different batteries; cleaned the gold lens contact; cleaned the lens contact, so far no success... I tried lenses on a mamiya 7 body and there is no issue. Pretty sure it's from mamiya 7II body.

Anyone has any experience? Would appreciate any input.

 

[Karlovak]

I have a similar issue with blinking LT, but only in cold weather (under 15 degrees celsius). Works fine indoors.

Anyone has any ideas?

 

[Karlovak]

It helps to clean the contacts with a rubber. But the problem comes back

 

[Chriscrawfordphoto]

Here's the factory service manual for the Mamiya 7. It might help diagnose your problem:
https://learncamerarepair.com/product.php?product=935&category=2&secondary=22

Page 29 tells you that the flashing LT light is caused by several possible problems with the camera's circuitry, mostly things having loose soldering. This is not a do it yourself job, I'd send it to a professional repairman.