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原帖由: Charles Fisher ,

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Hello there, it's been a while since I've access this site. Allow me to comment on this OLD matter that you had (assuming that you have resolved the matter by now), you know a lot these earlier Macbook pros appear to have this "common issue" that was never fully explained and although there are a lot of other factors that can contribute to the cause (compounding the initial problem) it would serve all users (who have these machines) to ensure that they have NO 3rd party software that the machine sites as a problem (by means thru the system profiler-Logs-Kernel log). Take the time and look thru the listing and see if you can identify any programs there that appears to be a problem, another way is to update all of your programs individually. Macs are very specific with their programs and there are some 3rd party software can give it problems you wouldn't expect and investigating this issue more deeply requires a lot of time and patience, it's not ALWAYS a defective logic board (now yes they can go bad i.e., certain components starts to "break-down" becoming erratic). Now here's food for REAL thought: if your machine has been opened up a few times you will want to look for any type of small problems that looks -huh: screws, single small wire strands, "dried" traces of spots between solder points of other components or exposed signal paths. Now, the thermal compound that is on the processors and video card can be a problem also. It has been said that the compound does not conduct electricity between solder points, I have found that when you find thermal compound that has spreaded to close to (touching) other solder points from the case of processors or video card I suggest that completely remove that compound from those components and the heat sink as well. Reapply fresh "Ceramique 2" thermal compound (it MUST be applied properly) to the components ONLY-not the heat sink, make sure you have examined it carefully for any type of distortion/stains before reassembling. This just my suggestion for you to consider, I know it will be time consuming but if you have the time to invest I suggest that you consider it.

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