The original Nikon D300 was known for its rubber I/O door not closing properly after a couple of years. It got to the point of taking 15 minutes to get it closed, then it would pop open a few minutes later. Very frustrating. After researching this I found this was a pretty easy fix and not too expensive. I'll give the details in later photos of the parts and tools needed. ***WARNING***! REMOVE YOUR BATTERY before doing any internal repairs!
Total time for repair: less then 15 minutes
The main part needed, Nikon part # 1k660-330
Can be purchased from Nikon USA
7am – 3pm PST Mon – Fri
I purchased mine from http://uscamera.com/1k660-330.htm
Micro Philips Screwdriver size 00
Magnetizer, Just makes it easier with these tiny screws.
Pliobond adhesive, recommended by Nikon service
Back side of the new door (1K660-330) the two original screws and rubber retainer which are re-used.
Rubber retainer mounted in door
Peel back the rubber grip just in front of the rubber door. This will expose the two Philips screws size 00.
Inserting one of the two screws
Inserting the second screw.
After mounting the door, just apply the Pliobond adhesive to both the camera and the back of the rubber grip. let it dry till it's a little tacky, then start pushing the rubber grip back into place.
Finished and working as you'd expect. Closes in a second and stays closed.