All my CF cards now give me the same message, including the original start up card. I originally got an out of memory message while shooting and replaced the card with a spare one but my Nikon 5700 did not recognize it even though I've used it before. I can't format any card in the camera now as all CF card functions are disabled on the menu. I tried a brand bew card with the same results.
All these cards still work fine in a reader and I did not lose a single shot. I just can't take any new ones.
Your problem sounds as if there's a bent pin in the CF card holder inside the camera. To fix it you will have to be very careful with a long blade fine screwdriver. Remember you'll have to straighten it in one go. If you bend them twice you can bet they'll break.
A powerfull light to see the bottom where the pins are is needed too.
If you're not willing to do the job yourself there's a guy on Ebay USA who straightens them.
my autofocus seems to default to SB flashing red 1/2 pressing does not cure this i have to manualy...
(More)
my autofocus seems to default to SB flashing red 1/2 pressing does not cure this i have to manualy reset the infinity button to take a photo - with in minutes the settings will revert back to SB flasing red.............
Nikon 5700 display comes up with C 1 and then unable to take a photo. Have reset to factory...
(More)
Nikon 5700 display comes up with C 1 and then unable to take a photo. Have reset to factory settings, changed CF card, formatted card. Able to take photos in menu mode