Question about Nikon D40x Digital Camera
HELP! I was taking pictures yesterday when the auto-focus stopped working on my Nikon D40x. I have the 15-55 AF-S Nikkor lens and also the 55-200 lens, and neither will auto-focus.
Through the viewfinder, the normal ISO AUTO  display changes to: ISO AUTO [r 15 ] when I push down the shutter release button to attempt auto-focus. If I click the lens A-M button to Manual, the camera works fine. The auto-focus seems to be the only problem.
What do I do? I´ve had the camera less than a year, but was given to me as a gift, so no paperwork or warranty. It has worked perfectly until now.
I had the same problem. My issue was with all my lenses. I solved it by going to the menu and selecting the custom setting menu (pencil icon). Then from the right menu select the AE-L/AF-L and press OK. Then make sure it is set on AE/AF Lock. Presto...all my lenses worked on auto-focus.
Posted on Feb 20, 2009
I'm using a tamron af28-88mm and get get the auto focus to work with my Nikon D40x
Posted on Mar 11, 2008
I too have the same auto focus issue. But the problem is intermittent.
Called Nikon today. They suggest:
- call when the camera is acting up
- be ready to give them the serial number
Apparently they are available 24 x 7 and will troubleshoot over the phone...
Posted on Mar 11, 2008
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Posted on Jan 02, 2017
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