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This is a very common in digital camera's caused by debris getting into the lens housing, get a can of compressed air attach the straw and give it one or two blasts between the crevice "camera body and lens housing" try the power! if that fails, try tapping on the lens housing with the side of your finger "gently" if successful aim the lens down towards the floor and extend and retract the lens a few times to further clean out any additional grit.
The E18 error is related to the LENS not able to retract fully. If it is still under warranty, I would advise you bring it to the nearest service center. This is to avoid further damages. Otherwise, you can try a few things below.
There are a couple of things you can do.
1. Turn it on and then off. Spray canned air around the lens.
If trick 1 will not work out, try this.
2. Make sure the battery is fully charged. Turn on the camera and then give it a couple of firm whacks on the side. Make sure nothing is blocking the lens and wait for it to fully retract.
Let me know how it goes.
E18 is the standard Canon lens error. The lens gets stuck when extending. If you did not drop it and there are no signs of damage you can check with Canon and try to get the camera repaired under warranty.
If it is not covered here are a few methods to try on your own, at your own risk. http://www.e18error.com/repair.html
Lens errors (believe "E18" is showing on your viewfinder) are fairly common. Usually it's sand or grit interfering with the lens extension mechanism. Or the camera's been dropped with the lens extended. Or the camera has been powered on, but the lens had been blocked preventing its extension. Or the battery ran down with the lens extended ...
I can't say I've had one fixed, but I have fixed several cameras for the E18 problem in the SD500 & for the blank pictures on the S2. I have not seen any of the S2's back for the same problem again. The SD500 E18 Error is do to the lens being jammed usually from sand or dust in the gears or from an impact when the lens was extended (I'm not saying you dropped the camera we see alot of cameras which were knocked against something when being carried by the hand strap with out the person noticing). This is not a flaw in Canon we see just as many of Nikon, Olympus, Pentax, Kodak, etc.. for the same problem, they just don't have an error code appear when it does.Normally I would recommend fixing the SD500 as they don't break again unless subjected to external problems like sand or impact.
The E18 error is fairly common. Usually it's sand or grit interfering with the lens extension mechanism. Or the camera's been dropped with the lens extended. Or the camera has been powered on, but the lens had been blocked preventing its extension.
Here's some things that you can do to try to correct it. They only seem to work for about 50% of lens errors, but they're worth a try:
the E18 means the lens system has a problem. I had it with my S2 and sometimes it worked, sometimes not. Eventually it stopped working. The only solution was sending it to repair, they changed the lens system.