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09-01-2015, 07:33 PM   #1
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Help! My K-50 has stopped working correctly and the screen is acting crazy

Hello All,
While taking some shots in my garden this afternoon my k-50 suddenly stopped working correctly and began exhibiting several symptoms:
First: The Auto Focus no longer works, I can still take pictures for the most part, but if I half press the shutter button, the camera will not focus like it normally does.
Second: The led screen developed an issue where several of the settings values (Shutter Speed, Aperture Value, Sensitivity, AF Point) will constantly blink, and/or flicker between different values, and almost none of the buttons on the back work correctly either. If I try to open a menu, the screen will open up the requested window/page, but the screen immediately switches back to the main view. In fact the only button/mode that seams to work is the image playback button.
Third: If I set the dial to Movie Mode, the shutter opens and closes at a rate of 2-3 times per second without stop (although I only let it do so for a couple seconds).

If I remove the lens the symptoms disappear, but as soon as I reattach it the symptoms start back up, and I only have one lens (18-135) so I cant try a different one.

I'm still fairly new to hobby photography, so I don't know if this is the result of something I did, or a hardware/software malfunction, any help/suggestions appreciated. Also, let me know if I can provide any additional information to clarify.

Thanks.

09-01-2015, 07:39 PM   #2
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clean the contacts? if its freaking out with the lens on
09-01-2015, 08:01 PM   #3
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Thanks for the response.

I cleaned the contacts, first with dry cotton rag, then with very lightly damp cotton rag; No luck with either. Unfortunately I don't have any isopropyl alcohol in the house, otherwise i'd try that as well.
09-01-2015, 08:07 PM   #4
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how bout the switch for mf, afc.....is it seated in position sometimes it can be in between.....throwing stuff out there

09-01-2015, 08:35 PM   #5
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Nope, I've tried all three switch positions with no noticeable change in behavior.
09-01-2015, 08:47 PM   #6
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Reset your camera to defaults. Include custom functions. Page 219 of the manual. Also you should reset the User settings page 174 I think.
09-01-2015, 09:00 PM   #7
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I reset the camera and user settings to default, no apparent change.
09-01-2015, 09:10 PM   #8
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Ugh. Any chance you are in a town with other Pentax folks? Someone available to let you try a different lens?

Mine did something like this right before it needed service. It seemed to happen when the battery was low. Is your battery fully charged?

09-01-2015, 09:33 PM   #9
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Just tried fresh battery, no luck.
I don't know any Pentax users near by, but there is a camera shop in town, I can take my camera in on my next day off and ask if they'll let me try on a lens.
09-02-2015, 12:02 AM   #10
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I experienced that behavior once. I had to upgrade/reinstall the firmware in order to solve the problem. After that the behavior has not reappeared. This was on may K-5II.
09-02-2015, 03:19 AM   #11
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QuoteOriginally posted by Bengan Quote
I experienced that behavior once. I had to upgrade/reinstall the firmware in order to solve the problem. After that the behavior has not reappeared. This was on may K-5II.
That was most likely the mirror flop issue.

QuoteOriginally posted by pandazerg Quote
I don't know any Pentax users near by, but there is a camera shop in town, I can take my camera in on my next day off and ask if they'll let me try on a lens.
In this case it sounds like the shutter mechanism may have failed. This is a fairly rare occurrence but it does happen with the K-30/K-50 line of cameras. I would take advantage of the warranty and have the camera checked/repaired.

Adam
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09-02-2015, 06:58 AM   #12
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I'd try pulling the battery, turning on the camera, and holding the shutter button for 30 seconds to drain all capacitors inside, then reinsert battery and see if it's fixed. Next I would reinstall firmware. If that didn't work, then I'd send it back.
09-02-2015, 07:44 AM   #13
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My K50 eventually had to be sent back and the "aperture control block" was replaced. The symptoms all disappeared.
09-02-2015, 06:11 PM   #14
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I tried removing the battery and draining the capacitors as well as a firmware upgrade, no change. I guess I have to send it in for service. Thank you to everyone who helped.
03-23-2016, 12:19 PM   #15
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The exact same thing happened to me earlier today with my k-50, which is less than a month old...Luckily I found this thread though, but what was the verdict on your situation? Did you end up having to send it for repair?
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