Ram slot problems

Question

I don't know if anyone else has had this problem, but this past December I noticed that only one of my 2 ram slots was reading the RAM card. I sent my computer in to the Apple Depot on 3 different occasions (the first time, my computer came back showing all of my RAM, but the computer crashed every 1-5minutes), then I sent it back and it came back running smoothly with 1 of the 2 RAM slots not reading (Read: original problem). Finally after the third time, I got my computer back and it ran without crashing and all of my RAM was accounted for (both 512MB chips).
That is.. until one week ago. I moved to Germany and when I got here, things were going slow. I went to the apple menu and selected "About this Mac". Low and behold, only 512MB RAM appeared.
My first thought is that I burnt it out because my computer heats up a lot fairly often (but my batteries Serial# doesn't fit the exchange program's criteria, mine is: W7339SKNNXOB. The computer's serial# does comply, however).
My more absurd explanation is this occurred on both occasions right after I flew somewhere and the computer got X-rayed.

Answer 1

Well, here's what Apple's PowerBook Service FAQ has to say on the subject:
Does Apple warrant my PowerBook service?
For PowerBooks under Apple’s One-Year Limited Warranty, Apple warrants against defects that arise from service performed for 90 days from the date of service or for the remaining period of the warranty, whichever provides longer coverage for you.
b For PowerBooks not under Apple’s One-Year Limited Warranty, Apple warrants against defects that arise from service performed for 90 days from the date of service.
So, at first glance, it would appear that if your repair was done in February, the 90-day warranty period might have expired. But, maybe there's an additional warranty (hopefully a longer one) that applies to the parts (i.,e., the logic board), and so the cost of a replace
b part
if not also the
b labor
would still be under warranty.
90-days seems awfully short to me, maybe it would to someone at Apple (a customer service rep, e.g.) as well if you make a good case in a persuasive way. That may be another option, albeit one with limited chances of success.
That's the best I can tell you right now; perhaps there's someone on here with actual first-hand experience with getting a repair by Apple on an out-of-warranty PB RE-repaired who can give you more insight.