Contact the Canon repair service:
Be aware, however, that the SX110 IS is out of production, so they may not have the parts to fix it. In such cases they usually offer an opportunity to replace the camera with a comparable newer model, or to upgrade for a reasonable price.
This camera runs on normal AA batteries, you can see the battery level indicator on the screen. Though the batteries do not last as long as proprietary batteries, but you will not be worrying about running out on them, as finding a pair of AA batteries is relatively easier.
Larry, I have done the exact thing you have been doing. I need/prefer optical viewfinders also and can't find one to suit my needs anymore. I wrote an email to Canon about a year ago, when I was camera shopping, asking why they are eliminating it on most of their new (new at that time) Powershots. The reply I got was that they're responding to consumers who are demanding larger LCD screens and don't need optical viewfinders. I replied that they should start reading forums to see how many people are lamenting the lack of viewfinders. Some people don't like to use the LCD because it eats up battery power. Others, like me, live in the desert with bright sunshine that renders the camera pretty useless with only a washed-out LCD screen. I asked the person at Canon to pass on my pleadings to Canon powers-that-be to not eliminate optical viewfinders. I also need a Powershot size with 6x or higher optical zoom for my business use, and I love my A720IS, but that was discontinued in 2008 so I can't buy another. I can't afford $300+ for a new camera. Canon appears to no longer care about consumer comments and just goes with the flow. I have three Powershots, but may have to move on to a non-canon if I can find a camera that better matches my needs. I can't be loyal to Canon if they no longer offer what I'm looking for.