I have the canon ixus

I have the canon ixus 75 (powershot sd750 in america) and it has suddenly decided to stop working! when i turn it on the screen is just black and blank, and moving it into different lights doesnt effect it. it will play my previous pictures back, but any new ones are just black so its not a problem with the screen. all the settings can be changed and the flash still goes off when trying to take a picture... so it is still functioning it may just be a lens problem. it stopped working after i jumped in the air a few times with it in my pocket so maybe something got knocked out of place. any help with this would be greatly appreciated!