Before you spend a lot of money, I would invest some time following the iFixit guide for your model and disassembling the laptop as much as necessary in order to clean out all the orange juice with q-tips dipped in rubbing alcohol. A substance like orange juice can continue to cause more problems down the road, and getting it out of the computer can prevent this, and even alleviate issues you are experiencing if you are lucky. Once you've cleaned it out, you can then evaluate what remaining problems still exist, if any, and whether you want to pursue correcting them. I just think that it is premature to buy replacement parts when you still have a substance in your computer that is toxic and needs to come out.