Hi. I have spilt liquid on my macbook pro, which has damaged the keyboard internally. After disecting my mac, cleaning the keyboard thoroughly, only few keys still function... These are my macbook pro specs (very old now) battery is a A1175 model no. it is a 2.0 ghz 15" 5000rpm 256/512mb (now 2 gig) I have now been searching for some time for the replacement keyboard but am cautious that if I purchase one from ebay, it will not work with my specific model. I have found many like this http://cgi.ebay.com/Apple-922-7183-...Trackballs&hash=item2eb3a88939#ht_1357wt_1139 but again, nothing reassuring me that it will deffinitely work with my model. Any help would be awesome. thanks.