I bought a PENTAX SLR K 100 D camera, loaded a new SD card, formatted it in the camera , inserted new batteries and tried to take a picture, No pictire, the shutter button seens to not be working. There is a f 689 in the view finder. I tried both MF and AF , both AUTO PICT and P ,The camera is set at defalt settings.I need help or must return it asap.

If I'm reading the specs right then the N73 works with SD cards. Your 4GB card is actually an SDHC card and will only work in devices specifically designed to work with SDHC cards. You'll need to use SD cards, 2GB or smaller.

They are being saved to the internal memory of the camera. With no card in the camera, go into the menu and find "format" and follow the instructions to erase the internal memory. Insert your card and it should now work properly.

here is a list of compatable memory cards
http://www.4allmemory.com/index.cfm?fuseaction=search.memorySearch&model_id=42425
.. any SD or MMC card should work up to 4 gb ... so your 2gb should be ok .. i suspect that it may be damaged .. you can try formatting it in a USB card reader if you have one on your computer .. some laptops have the SD slot built in .. there was some compatability issues with memory cards for older cameras but there shouldnt be any with such a new machine .. make sure the contacts are clean and the "protect" switch (if any) is in the unprotected mode .. when you format the card it may take several minutes so give it time .. if you are going to take movies then its better to use a "high speed" SD card .. like the 133x mentioned in the above URL .. slow memory may cause missed frames or 15 fps instead of 30 fps record rates.. .
the specs on your camera do show SD and MMC compatability .but they dont show any brand preference .. .

F4shsk1

are you sure the camera is a Pentax K1000.
the K1000 is a manual 35mm film camera, the only electronics in it are for the light meter. plus a circuit for the flash connections.

do you have the ability to attempt transfering the pictures onto another computer  maybe its just that computer  what type of card reader are you using  is it factory installed or aftermarket try installing a different card and see it you can transfer pictures from your camera to the computer then  maybe its a file type(format)problem  theres what i have good luck   let me know how it goes 

It will not work with any "sdhc"

I know that usually, you should format the card for the camera that your going to use. Try formating it in the camera and see if that works. Let me know if I can do anything else for you,

Rob

This can also happen when the lens have an aperture adjustment ring, and it is not set to the "Auto" setting ("A", on my Sigma)/

Trun the camera off and remove the batteries. Leave it for at least a minute before inserting the batteries. Put the car in and turn the camera on.

The firmware in these cameras can get confused. Removing the batteries for a minuite or two will allow the camera circuits to discharge and so it will reset from start when powered-up again.

If this does not work then the camera may need to be sent away for repair. This need not be expensive it could be as simple as re-programming the camera. (Their program memory is writeable and so it can be accidentally altered under certian circunstsances. It may be possible to do this yourself using the downloadable firmware upgrade, but I would let someone else try thet first!)

However, it is just possible that the new card is also faulty!

Check the cards in your PC by obtaining a SD card reader to allow you to plug it directly into your PC.

For reference I would always recommend inserting and removing memory cards with the camera turned off. I would also use the SD card reader to load the images into the PC. Unplugging devices form the USB port can be harmful to some devices. Check the bottom right of your PC screen for an 'safe unplug' icon when things are plugged in.

Others here have suggested the problem lays with the plastic gear on the advancing motor beside the mirror.

This might cost $100 or so...?