autoexposure error message in window
camera was dropped and now displays "autoexposure error" message and will not work in auto mode. What can be done?
Released in April 2011, the D5100 replaces the D5000 as one of Nikon's popular consumer DSLR cameras. It features a replaceable Nikon F-mount lens.
Sadly, It sounds like the lens or the lens mount got damaged so the electrical signals to the iris controls is not functioning. If you can try a second lens does it fail with it as well? If so your issue is within the body if it works then you may want to think about a new lens Vs repairing as the cost of fixing maybe close to the replacement price.
If the camera was dropped do the following which only requires a moderate skill level.
I had the auto exposure issue on my D5100, following the in depth tear down https://fr.ifixit.com/Tutoriel/Nikon+D51...
to detach the back cover (with the lcd), I could indeed find that it was just one of the zero force insertion ribbon that had its lid opened thus the contact was wrong. Closing the small lid did the trick - that’s what the guy in the uTube video was also saying, and it’s true - however I would not recommend using the video but rather the cristal cleat iFixit manual.