I have a Nikon DX D5100. I've used it multiple times for the last 3 years and feel very confortable with it. We used it last night for a Halloween photo booth and only the first 10 pictures turned up on the SD card. We took over 250 pictures and all the others are just a black block. It shows as if we took the picture with the cap on. We took the pictures in the sports, automatic, no flash setting to get a better lighting because it was indoors and at night. After we noticed all the pictures were a black block, we took some more to see what had happened and they were fine. I did let my friend take the pictures though, and she is very familiar with these type of cameras, so I just added a screen shot of my laptop after I downloaded the pictures. Only the first few appear fine. We took them with the same setting. All the others are just black blocks! I must add that when we checked the pictures on the camera after we were done, they were black too. I was hoping it had to do with the battery or something. But when I downloaded the pics, nothing changed! :( I have no idea what happened! Any clues anyone?
Note in your examples that images at
row 4, columns 5, 6 & 7 and
row 7, columns 7, 8, 9 &10
have a faint "white" bar at the top of the image.
Increasing the brightness and or gamma on the sample supplied shows what appears to be a reddish line source.
Doing the same on individual images may give you some visual clues as to what happened.
The source LOOKS like a light or heater.
If it's an IR source it may be affecting metering, but seems unlikely to feature in so many photos.
Did the samera show a black image immediately post exposure - even if not post viewing every shot it is offten enough useful to do an occasional check to pevent situations like this occuring.
Also, other 'black' images may have some image data present - trying adjusting a few.
Knowing how the camera was set and used may help.
Access to a few of the original images with EXIF data intact would probably help greatly with post mortem. If you have a Dropbox or similar account, making a few originals available may help. In this case IP loss is not liable to be a problem with full res images :-).
If a photo appears bad on "post view" in the camera it almost certainly is - cameras "break" only occasionally, but a bad image is ever only a change of settings away. So the chances of the camera displaying wrongly but of the actual image being OK are small. Therefore, checking results occasionally and adjusting the camera to get at least some sort of image is essentially essential.
If you use flash, the flash has a speed number. Most are good up to 200th of a second. If you try to go faster with your exposure, you will get pictures that at least have part of the frame black. At most you could get nothing but black. The reason is the shutter has opened and closed before the flash even fires. When using your flash make sure to not dial up exposure speed faster than what your flash can fire. Usually no more than 200 in some you may be able to go up to 250. If you need faster exposure you have to make sure your subject is lit well.