Mbp random shutdowns. out of ideas. didnt pay $4000 over for this garbage.

Question

So i had my 1st gen cd mbp for over a year now. almost a year and a 1/2 in fact. I forgot to buy app. Bad mistake, because its super unreliable now. 3 months into ownership, fans stopped working, magnetic catches fail to work so i cant shut my mbp. So i brought it to the service centre. they said there was a screw stuck in the fan which resulted in it not turning. *** did that screw come off? He said he had no idea. Fantastic.
My problem was fixed, but wif it came another problem. my top case was severely misaligned. alot of gaps all over. I brought it to another service centre who claimed they ordered a top case for me, and they would replace it free of charge. And they did, but it didnt resolve any issues. Still alot of gaps. I was told "its like that". I had enough of waiting so i just forced myself to live with it. Get this; i had to live with imperfections on an high end premium mobile computer which cost me over $4000 bucks. Garbage.
Fast forward to abt 2 months ago, my warranty had ended, but the gaps were getting worse. As it was a problem that had existed in the days since my laptop was covered, i called Apple and asked nicely if there was something they could do about it, since it was an issue that was left unresolved from many months back when my warranty was still valid. No problem they said. I was a happy man, for awhile, as you will soon find out why this happiness was shortlived.
I should add at this point, that my mbp has been on the receiving end of a stick of kingston 1gb ram(bumping up my system ram to 2gb) and a replaced battery, and that its working PROPERLY
So i brought it in to 1 of the service centers, and i was quite suprised to discover they actually replaced my top and bottom case. There were still gaps.. but minimal. The CSO told me the same thing; there are bound to have gaps once an mbp has bene taken apart and put together again. Garbage isnt it? I didnt fork out big money for imperfection. But then again, as i said, the gaps were quite minimal and it was on a level i could accept. So i signed for it and i was on my way home.
Since then, i have been on the receiving end of many many many random shutdowns. iStats showed a very high 128deg. c @ heatsink B while the rest of the readings were pretty normal. and then the whole thing would shut down. @ times heatsink B readings were not available on iStat. Sometimes heatsink B disappears altogether.
So i took it back, where after subsequent diagnoses by the techies, said that it was the result of a faulty battery. I told them i had no problems whatsoever before i brought my mbp in.. but they said they were very sure it was a faulty battery. What timing right? Well they gave me a new one free of charge, because i was under the battery exchange program. So, i am into my 2nd battery of my 1 and 1/2 years of mbp ownership.
So it looked ok the 2nd time i brought it back home.. but now its still developing sudden shutdowns. I really dont know what to do now. its not OS based as it happens both in Xp & OSX. It happens whether the power is plugged in or not.
Can it be the ram? But i swear it has not been giving me any problems before.
Seriously can anyhelp? Any suggestions? I cant be going back to the service centre everytime it happens. I need my mac everyday for sch work and etc etc. i am really not compelled to yell @ Apple over the phone. Nobody deserves to be yelled @ for something they didnt do....

Answer 1

Thats what i am doing now. I took out both rams and reinserted. And you know what... it seems fine now. Its like a very irritating bee-otch of a girl friend. 1 moment all nice and sweet. The next shut on you like never before