Question about Canon PowerShot A540 Digital Camera

1 Answer

Canon powershot A540

My camera displays the message "card locked" when turned on and i dont know how to un-lock it (or even how i locked it in the first place!)
can you help?
Thanks
Carolyn Green

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  • kim2360 Apr 07, 2008

    I get the message "card locked" even though the card is NOT locked. Now what????

  • Anonymous May 22, 2008

    I HAVE A CANNON POWER SHOT 540 I BOUGHT A 4 G DSHC CARD I PUT IT IN MY CAMERA AND TURN IT ON IT SAYS MEMORY CARD ERROR I DON,T KNOW WHAT TO DO

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1 Answer

There's a little switch on the side of the SD card. Remove it from the camera and find the switch. Normally, there's some very small printing next to it saying something like (Lock / Unlock).

Posted on Mar 31, 2008

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1 Answer

When putting a Lexar Multi-Use 16 GB SDHC memory card in my Canon Powershot A540 I get Memory Card Error message as well Card Locked message. Have tried unlocking it by the slide on side of card, is t


It's a lost cause. The A540 works with SD cards. While SDHC cards will fit into the slot, they are electronically incompatible and will not work in devices not designed for them. You need to stay with SD cards, 2GB and smaller.

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Card locked error on screen card is unlocked and even new card gets same message


There are several possible causes for "memory card locked", "memory card error", or "no memory card". The most common cause is having the tiny slide switch on the side of the card in the wrong position. The second most common is trying to use a 4GB or higher SDHC card with an older camera made before SDHC format came out (sorry, an A540 can only use 2GB or less standard SD cards. These are very inexpensive these days, and are available on Amazon if your local store no longer carries them). There are also other common causes if the above didn't help, with troubleshooting steps for this problem listed here.

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My memory card is locked and i tried everything i have a canon a540 powershot and the memory card is a sandisk 8gb


Have you noticed the slider on the side of the card? This acts as a lock and might have been accidentally moved to the locked position, in which case you could just move it back to unlock again. Hope this helps.

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Look at your memory card. SD cards have a slide switch along one edge. The position farthest from the contacts locks the card, protecting it from writes. The position nearest the contacts unlocks the card.

Dec 17, 2010 | Canon PowerShot A540 Digital Camera

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If you've already tried the lock/unlock switch on the side of the card, then see this link for additional troubleshooting tips for this problem.

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When this problem occur you need to set the memory card unlock or not protected. Remove the memory card from camera and you can see a small button in the memory card, so you need to slide that to set the memory card unlock or not protected.

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The A540 works with SD cards. Your 4GB card is actually an SDHC card. While it fits into the slot, it is electronically incompatible and will not work in this camera. You need to use SD cards, 2GB and smaller.

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2 Answers

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Remove the SD card from the camera. Look for the tiny slide switch on the side of the card. Slide this switch back to the unlocked position (opposite of whatever its at now).

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