Focusing wont work after dropping

It looks like the autofocus system got damaged, take it to a service center for repairs.

HI there, the camera lens gear is damaged from internal. So you must changed that. Other wise it gives you lot of trouble. Thanks.

Focus problems are quite common after a lens error, it sounds like you still have an issue with that lens unit. If you need help, there's a great site taht just specializes in the powershot problems, nothing else at all. Try going to www.camerasandparts.com and you'll see the fix for this for your SD890 camera. I hope that helps, that site is amazing for the powershots and that's where a lot of people go for help with these. Good luck with it.

It won't focus because ya lens is out of focus due to it being stuck had same prob wig my Sony worked out cheaper to buy a new camera than have it fixed.very fiddley to repair hope if bin some help

Lens errors 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 ...

Here's some things that you can do to try to correct it. They only seem to work for less than 50% of the lens errors, but if the camera is out of warranty, they're worth a try:

http://camerarepair.blogspot.com/2007/12/fixing-lens-error-on-digital-camera.html

If the camera was open (lens extracted) the camera lens may be damaged. If you can retract it (power off), then maybe it's just dirty. Can you zoom in or out?

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:

http://camerarepair.blogspot.com/2007/12/fixing-lens-error-on-digital-camera.html

1>>u may have dropped the camera in some place.
2>>the camera POWER ON switch must have got pressed while the camera was inside pouch. if this has happened, the lens system gets jammed and so lens wont retract. for this problem it costs nearly 1800rupees in indian service center.

my acm dropped and i messed up the lsenes it wont go in please help me how can i fix it my self?

If its making a noise when you try to zoom in and out I would suspect physical damage. The more you mess with it the greater the chances of damaging it beyond economic repair. I would take it to the local authorized canon repair shop.