I've had my D90 for about 2 years now and this is the first problem I have encountered with it.
Whenever I try and put a memory card into the slot in the camera, it will not click/lock into place.
Aimee
Aimee's Photography - Home
We had a very similar broken card slot problem on our D90. The card would not click into place, and no spring pushback was felt when inserting the card. The camera would not recognize it. Pardon me for resurrecting an old thread, but I want to share how I went about fixing it.
The latch mechanism is on the side of the slot that is toward the top of the camera. It can get stuck in latched position, which is why we felt no spring push-back action when inserting or removing the card. A small bright flashlight will help you see inside the card slot. Make sure the camera battery is removed. Run the non-cutting end of a small, e.g. 1/16", drill bit, or similar tool, down the side of the card slot that has the latch. Keep the bit touching the side of the slot as you slide it along. As you get to the bottom, you will be able to push on the latch and feel a small spring push back. Push just a little more and the latch should release. Now the fix is halfway done.
With the latch released, you will feel the spring push back as you insert the card. But the card will refuse to latch in place. I thought this could be because a small piece of debris was either fouling the mechanism or preventing the card from going in quite far enough to catch the latch. Holding the camera with the slot opening on the bottom, I used a skinny wand on my air compressor hose to shoot a few very quick blasts of compressed air down the slot at various angles. Not too much pressure; maybe 40 psi. This apparently dislodged whatever was stuck in there, and the latch began working. The camera recognized the card. Success! :thumbup: If you do not have access to compressed air, a canned air duster may be worth a try. But it may or may not be strong enough.
If it still won't work, I think sending it to Precision Camera for a flat rate repair is the best bet. Good Luck!!