re: Question about computers

My girlfriend's MagSafe went out not long after spending 6 weeks in Italy. It worked sporadically and occasionally the brick would lightly hum. She neglected to tell me the second part until much later when it finally went out. Apparently, it was going bad when she got there, and it slowly died. What I believe did it in, though, is that she forgot the International kit she bought from Apple here in the States, and when she found an Apple store of some sort in Florence, they gave her some shitty adapter. It may be a coincidence, but her MBP started acting up not long after she got back. A couple of months later, she experienced a full Logic Board failure. Now, I'm not positive that this was caused by her travel, but I would be very surprised if it didn't have a big impact on it.

It's always better to buy an adapter specific to your location if you're going to spend an extended amount of time there. It may be unnecessary in most cases, but the damage that can be done in the instances where shite goes South is usually far more expensive to repair.

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With my lack of computer knowledge, I always figured that that signaled overworking and that it may have lead to, at least the lines on my damn screen.

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That sounds like you're having an issue with overheating. If the fans are spinning up to a loud volume and you occasionally see lines, you could be running into overheating, specifically you GPU overheating. What type of lines are they? Are they more like waves and static on TVs or are they stationary with patterns? The lines could be artifacts indicating GPU issues.