Mamiya 645 pro help needed please

[Thomas Ashley]

When my Grandfather died last year he left me his Mamiya 645 Pro with 55-110 lens which was working fine

Today I went out and NO matter WHAT I do when I chose a shutter speed in the AE prism finder it shows TOP DOWN

AV or SP (ok).
chosen shutter speed (ok)


However I am also getting "Lt" flashing lower left occasionally when I turn off and on again after a while and it will not go away no matter what combo of aperture/shutter speed

Chyanging from AP to SP makes NO difference

Help thanks

 

[Thomas Ashley]

What is worse I can locate NO WHERE to have it looked at (Wales UK)

 

[Kino]

Super fresh batteries? Many cameras are very finicky about voltage...

 

[MattKing]

Welcome to Photrio.
As Kino posted, replace the battery. Preferably with a silver oxide or lithium type, although in a pinch a really fresh alkaline battery can give you some use.
In addition, clean all the electrical contacts - the battery compartment, the finder, the film back.