my mbp mid 2009 13'' was giving me trouble 3 weeks after i bought it! they replaced my HD and everything seemed fine but then i was having all kinds of trouble...i kept getting the beach ball for the simplest thing like opening a new tab in safari...my headphone jack sometimes would stop working, the wifi would fail to where i would have to constantly turn off and on the wifi to connect, and i would have to force quit safari all the time. well they replaced my logic board last week, I thought this would resolve all my issues...but no.. im still getting the beach ball all the time. My keyboard shortcuts wouldnt work (I tried brightening the screen and turning on the backlit keyboard and they wouldn't work..so i opened system preferences to do it manually and that crashed on me so I had to force quit out of system preferences!). I then tried to restart my computer...nothing happened. I tried to shut off..nothing happened. I had to manually turn off and on my computer.. So what should I do? I just got a new logic board.. what could be the problem????