How can i fix my Samsung Digimax camera?

Hello, i've got a Samsung Digimax A7 7 m.p camera. Even with Energizer lithium batteries it drains them after about 5 pictures, also the pictures are coming out with faint lines across them. This is only a recent thing. I have dropped it a few times & it's a few years old but i'm rather attached! Any help would be appreciated! Thanks.