Alright, So I've got a 17" Powerbook that makes colorful grinding noise coming from the bottom right fan/harddrive area. This really scares me. Details: I'll be doing anything, then it hits, slowly at first, then it escalates into all kinds of problems. Typical example - focus my attention onto an safari, spins. Try to switch to another program, switch works, but then first command spins the program. Now I can't get a result from clicking anywhere. Hold power key. Violent and sad shut down. Restart. Grinding wheeze as my shiny paperweight takes a dying breath. By this point, nothing really happens, just noise and if I'm lucky, the verbose logging kicks in just in time to stop doing anything. I'll sit in disbelief for a moment or two before turning the machine off and walking off, wondering how on earth I shall deal with this. Here's the kicker - I'll turn it off for the night or say another 24 hours, the machine boots up just fine and dandy, SMART Status is verified, passes the hardware test, I go on my merry way....for a month. Repeat at top. Thus far, this cycle has happened to me three times (currently in meltdown phase, sadly looking upon greybook while using roommate's inferior whitebook). I was hoping (ironically) that after a few more meltdowns the problem would be consistent enough to show it to someone else and get repair credit, but to no avail. So I guess my question is, has this happened to anyone before? I'm feeling like I if I take the hit and try to mail it off to Apple, I'm going to have some problems since the problem is not isolated, and, from what I can tell, near impossible to reproduce the problem controlled. How many components might I have to replace to get this frightening halt to my work to go away (best, worst, likely scenarios if you're feeling particularly ambitious, saint-like)? Thanks.