8mp rear facing camera repair manual

I would like to refer you to this answer. Unfortunately, it looks as though the camera is soldered to the mother board. This makes repair extremely difficult, though not impossible. There are many solder points and you would have to flow them all simultaneously to remove the old camera without incident. I definitely don't recommend this repair for an inexperienced DIYer. Try to find a friend that is well versed in electronics repair that may have the tools to do this.