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Canon PowerShot A540 Troubleshooting
6 MP camera with 4x optical zoom.
Battery Error Message
The camera does not turn on or says to change the batteries.
Double check to see that you have the right batteries. You need two AA batteries.
Incorrectly Positioned Batteries
Once you are sure you have the right batteries, check to make sure that both batteries are positioned correctly in the camera. Load the batteries in making sure the + goes with the + and the - goes with the -.
Open Battery Cover
If both your batteries are working and positioned correctly, make sure the battery cover is closed properly and sealed completely. If it is not completely closed, the batteries will not make complete contact with the camera.
Internal Battery Issues
If you have replaced the AA batteries and the camera is still not working, then the internal battery may have died. You will need to replace it by following this guide.
Lens Error Message
A black screen with the text "Lens Error Message" appears when you turn your camera on.
Try restarting the camera to give the lens the extra push from the battery to fully open.
Batteries Died While Lens Open
Try removing the memory card and then install the new batteries. If you turn the camera on with the card removed, it should come back to life reset. If it then says Error E30, place the memory card back in the camera and turn it on again.
Camera Dropped While Lens Open
Dropping the camera while the lens is fully extended could misalign the lens. Place the camera flat, facing towards the ceiling, and hold the power button and shutter button down at the same time. This should autofocus the camera and realign the lens.
If your lens is damaged/bent/crooked, you may have to repair or replace it.
SD Card Error Message
The card error message pops up when you turn on your camera and you can't save your pictures.
Incompatible SD Card
If you are getting an error message but know that your SD card is functional, check that the card is compatible with your camera. A 2GB SD card should work with all cameras, but larger SD cards sometimes are not compatible with older cameras.
Lock Position Enabled
If you know your SD card is compatible, take it out of the camera, and make sure the switch on the side of the card is switched to the unlocked position, which should be the top position. If your SD card is locked, it is not able to be read inside the camera.
Corrupted SD Card
If it is a compatible SD card that is unlocked and still doesn't work, your SD card might be corrupted. Check by putting it into another device, and if it still can't be read, your SD card needs to be replaced.
Damaged SD Card Reader
If you know your SD card is 100% functional, your problem could stem from the SD card reader inside the camera. If the damage is that extensive, you will need to remove and replace the SD card reader by following this guide.
Flash Is Not Working
The camera will not flash at all.
Flash Settings Turned Off
Check to make sure you have the flash setting turned on. Click on the flash button and make sure you see that it is turned on.
Broken Flash Motherboard
If the flash setting is turned on and it still doesn't work, then the flash motherboard may need to be replaced.
Take apart your camera and remove the flash motherboard correctly so you can replace it.
Function Keys Are Not Working
The keys used to control the camera's functions are not working correctly.
Stuck Function Keys
Some sort of liquid or dirt may have gotten stuck in the function keys. To fix the keys, clean them properly.
Damaged Function Key Motherboard
If the keys are clean but still are not responding, the unit that recognizes the function keys' commands may be damaged. You may have to replace the function key motherboard.
LCD Screen Is Not Working
Your LCD Screen is not working at all and won't show any picture.
Broken LCD Screen
If you drop or hit your LCD screen and it is cracked, it may be broken. If there is nothing you can do to get a picture to show up, you will need to order a new screen and replace it.