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08-18-2010, 11:27 AM   #1

Join Date: Feb 2010
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Pentax 645 stuck on M 1000 (LCD and viewfinder)

Hi, my underused P645 is stuck on M 1000 (LCD and viewfinder), although I changed it to Auto P by pressing "mode" and the up and down arrows. If I press these, it does show Auto P, but as soon as I release the buttons it reverts to M 1000.

Is this a case of the lithium battery needing replacement? The manual does alert to this scenario: "in case the mode settings and exposure counter do not normally work ... take the camera to an authorized Pentax service facility for replacement of the lithium battery" (p. 67). In these days of obsolete models and service facilities,

1. can I replace it myself and
2. if so, what battery should be used?

Thanks for any advice,
All the best,


08-18-2010, 12:46 PM   #2
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Is the insert with a film in the body?
08-18-2010, 04:23 PM   #3

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Original Poster
it was—it occurred when the last picture was on the roll. I shot that, removed the film, then tried to insert a new roll. But it does not proceed—the release button doesn't do anything. EDIT: non-issue. I happened to use a film insert without film—although I'd almost swear it had one on it. Film made the difference.

Last edited by Smolk; 08-20-2010 at 06:58 AM.

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