Troubleshooting with my Powershot A60

[LadonnaKen]

Hi, I'm new to this forum. My name is Ladonna, and I have been taking pictures of my son (probably too many) with my Powershot A60. Unfortunately, my camera has begun to "act up." It'll turn on and off just fine, but when "on" the screen will turn into a fuzzy mess. I accidentally discovered that if I would tap it, it would reappear and work just fine; however, this would happen over and over, and now, the tap has to be a hard hit. I tried turning the dial on top of the camera to the mode that disables the LCD screen, but the picture will still come out with the same fuzzy image (I mean, completely black with purple lines--the picture is not there at all). This makes me think that something else is wrong--not the screen. I also replaced the memory card, and, of course, the batteries. Any ideas on what I can do to fix it, or if a camera shop could fix it?

Thanks so much!!!