Screen says "card is locked"

I can only offer this: (sorry if it does not help)
When the micro USB Cable is plugged into the camera you MAY be able to take photos. The camera MAY work normally EXCEPT for the MONITOR or Screen. The screen is TURNED off when you plug in the cord.

I have the exact same problem, have not found a solution yet.

SD and SDHC cards have a slide switch along one edge. The position farthest from the metal contacts locks the card, protecting it from writes. The position nearest the contacts unlocks the card.

No your pictures already taken are fine as they are stored on the memory card.

If there is no other damage to the camera you can still take pictures and they too will be fine.

Hope this helped. Please rate the answer if it does.

lol, ok...The memory card will only go in one way. But check the little white switch on the side of the memory card and make sure it is NOT in the locked position. Once this is taken care of reinstall the memory card. Now in you options/menu screen you can select on there where you want your pictures to be stored...Device / Memory / Auto. You can either put it on Memory or Auto (if you have this). In addition, you may need to format your new memory card. This is also in your menu screen to Format Memory Card. Go ahead and do this. But be forwarned...if you do this when you have pictures on your card, it will erase all of your pictures completely. If you do those things, everything should work fine. You don't need a full charge for your camera to work, but if you have rechargable batteries, it is recommended to fully charge your camera before use. If you are using standard AA batteries this isn't necessary. Oh, and when your memory card is in the camera you should see a little icon on your LCD screen that looks like a mini memory card. This is an indicator that the camera recognizes you have the memory card in the camera and along with that will be a counter...ie 4/1200. The first number is the amount of pictures taken on the card currently and the second number is the total possible pictures you can take on the card before it is full.

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Hi!

Can you check if there is a small push button on the memory card itself? It could that it is currently on write-protect mode.

wheather you check in computer repair shop is their any virus present in memory card? format your memory card! check virus is present in your computer or not! ?Try it!

Check the switch on the side of your SD memory card. It is a small sliding switch which has a lock position. Sounds like the switch is in the "locked" position. Unlock, reload card, & you should be good to go. If not, the card is probably damaged.

Assuming your camera acts like a removable drive when connected to the PC try the following.

1. Right click the removable drive(your camera) in my computer and go properties>tools>error checking>tick both boxes>ok
2. Wait till it finishes and check if you can now view the contents of the card. And copy to safe place straight away.
3. Try http://www.officerecovery.com/freeundelete/ to recover any deleted files or fragments of damaged files.
4. Let me know if any of this works.