SD card door is broken on my Nikon D40

Won't stay in ? Are you sure that you use a Sd card for the Camera. And if so that it's not broken ?

I ran into this exact issue (64GB Sandisk SD not working with an old Nikon D40). The problem is that the camera requires FAT32 formatting, which is not supported on partitions greater than 32GB (i.e the 64GB stick). A format from the camera attempts to repartition all device space (64GB) which is incompatible.

I solved this by connecting the SD to my laptop, opening the windows disk management utility (diskmgmt.MSC), deleting all partitions on the SD (right-click, delete partition on all allocated space), the right clicking the unallocated space, add simple partition, then allocating only 32GB and using FAT32 as the format (any more and windows will only provide exFAT as an option, also not compatible with Nikon D40). Plugging that into the camera and NOT reformatting from there worked.

If you feel up to doing the replacement yourself, you may order the part here.

If you want to do the replacement yourself you can get the door for about USD 15.

Hi Sasha - New Nikon repair parts are not available in the marketplace. You'll find repair parts that are offered for sale are used. The used products may be very good - and in some cases practically new - but you'll never know for sure. A battery door and other non-electronic parts should be pretty easy to determine if they have been abused or damaged upon arrival. Electronic parts are going to be a crapshoot.

I was quoted $270 to replace a sensor in my old D70 last year. I found one on eBay for $55. I have no idea how many times the sensor was used, but fortunately it seems to work fine. The work to replace it was tedious and required a very steady hand and some small specialty tools. Replacing the battery door will probably be nowhere near as involved - but I don't know your level of ability, either. You should ask anyone that is selling this part for written instructions or a link to instructions or video that details the replacement process. Read or watch the directions and determine if it is in your skill set. If not, you'll never go wrong sending the camera to Nikon for repair. It will only cost you a bit more - but it will be done right and your camera will not incur additional damage during dis-assembly and reassembly.

I hope this helped and good luck! Please rate my reply. Thanks.

If you're going to do the replacement yourself, you can get either the door shell or the door assembly, in silver or black, from http://uscamera.com/d40.htm

Replacement parts @ http://uscamera.com/d40.htm

first are you still under warranty, if you are don t tell nikon it was dropped they may not cover it if it was dropped. Tell them it stopped reading cards all of a sudden. See if they can fix. If warranty is up may need to get it repaired yourself.i had similar problem with other name brand camera. i didnt fix though was inexpensive camera. I know nikons are high in price so you may want to get fixed.

It could be the card reader is unable to read the card not your pc. You might be able to get a firmware update from card readers web site.

Hello. Make sure the write-protect switch on the SD card is in the UP (nearer to the contacts) position. Try the card in an SDHC capable reader on your computer first. Note that the SD card can only be inserted one way - make sure you're not putting it in upside-down! If the computer recognizes the presence of inserted card (whether it can read it or not), format it at FAT32. When finished, remove properly (icon in system tray) and insert into your D40 slot, WITH THE CAMERA OFF!! Turn on the D40, and if it now recognizes the SD card, FORMAT it again, in the camera. Good luck.