Hi, I picked up a used 17inch macbookpro and have been very happy with it. Except for recently... The battery started getting extremely hot and then began to swell. I purchased a battery on ebay (it was not macbranded). It came and looked identical. Everything seemed fine. Then after a week or so, the laptop simply stopped working with the battery. I have to keep the power supply plugged in, or it doesn't work. OK, So months go by. Now all of a sudden the wireless card stopped working. My pc and iphone connect to the wireless, but not the macbook. This is so strange. How do I go about fixing the machine for a reasonable price? Thanks in advance!'