I dropped my Canon Ixus 75 on the ground while it was on, so the lens was extended and now I can't turn it on.

Answer 1

Gravity and water are the leading killers of digital cameras. Now you know why a neck or wrist strap is such a good idea.

Repairs will be at your expense and will likely cost more than a new camera. You can use the old one as a paperweight and begin shopping for your new camera - and a neck or wrist strap.