I have a Mid 2009 15" Macbook Pro, A1286 model. It was dropped pretty good, so I changed the hard drive and then optical drive after. I reinstalled OS X 10.5.7 and then installed the apps, worked fine for hours until I tried to run Diagnostics on it twice, both times it will shut down during the diagnostic and it's dead with the black screen. First time, i waited until morning and tried to resart which it did, then died again during diagnostic. I took out the battery to reset SMC and I got it to turn on, it worked fine. Then I shut it down and now it won't turn back on? Anybody have any ideas what i should do now?