Why won't my Nikon S3000 (Coolpix) autofocus whilst taking a photo?

Focusing works fine normally, but when it fine focus' just before fully pressing the button, it makes a clicking/grinding sound and a red box appears on the screen, where a blue box normally would to show the position of the supposed subject. Could this just be sand/grit? If so, how can this be fixed as it isn't covered in the warranty.

Thanks!

Read more: Why won't my Nikon S3000 (Coolpix) autofocus whilst taking a photo?

GoPro or Fugi film Camera?

I got both for my bday but I have to pick one, any thoughts about it? Looking for food underwater or action pics

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Which is better Nikon Coolpix P530 or L830?

Which is better Nikon Coolpix P530 or L830?

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Why won't my Nikon Coolpix turn on or charge?

About two years ago I bought a nikon coolpix S3000 and it stopped working last summer. It would say battery exhausted but when I charged it for hours it still wouldn't turn on. Not sure why it's not working.help please?

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How to open the battery door on my camera?

I have a Nikon Coolpix camera and I need to open the battery door but I have no idea how. I can't find the instruction manual.

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Will a DSLR Microphone Work on a Nikon L330 Coolpix Camera?

How about an attachable one, such as Rode's DSLR Microphone?

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Which waterproof rugged camera?

I'm looking for a waterproof camera for an upcoming trip to Spain. I've looked around some, and am hoping to get one for under $200. I'm no professional photographer or photo enthusiast, although I am looking for good picture quality.
So far, I'm leaning towards the Panasonic Lumix DMC-TS25, but I am also considering the cheaper Panasonic DMC-TS30. Is it worth it to go with the more expensive TS25? What are the benefits?
I have also looked into the Nikon Coolpix S32. I realize this camera is geared more towards young people, but it can go farther under water (33 feet instead of 23) and seems to offer similar features at a far lower price. If I were to choose this camera, would I be sacrificing photo quality, and if so how much?
If there are better choices for value or quality with similar features under $200, what are they and what are their advantages?
I realize i have asked many questions but I really appreciate any and all responses!

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What does it mean when your cameras memory card says write protected?

I have a Nikon Coolpix camera & after I put my memory card into my laptop to look at them, when I put it back into my camera, it won't take pictured and it just says 'Memory card is write protected.' What happened to it?

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How much it will cost to unjam a lens?

I have a Nikon coolpix L18! I was at a friends house and he smacked my camera out of my hands and made it fall lens down on a wood floor! Now the lens is jammed and wont go in or out! So the only solution is to take it in and get it fixed! How much do you think that will cost!

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How to blur the background of a picture?

Like this one I have a DSLR camera (nikon coolpix)

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