So here is my situation, I am a college student who walks to class everyday and carries my laptop everywhere in my backpack. I have had to have the ribbon cable replaced 2x because it broke, according to our schools it department from the stress of being carried around in a backpack. Now I am having a different issue in which the ram solder is failing for the same reason (stress of being carried). My laptop is out of warranty so I have a couple options, first I can test my computer and in the event that only one slot is failing I can buy one large memory stick and but it in the good slot, second I can have the logic board replaced and it should be fully functional, or third I can upgrade to a retina which doesn't have either of the issues I have experienced and trade in/sell my current laptop for whatever that gets me. My question is have you experienced any of these issues or similar? Is it worth it to repair mine or should I get a new one? And are there any known issues with the retina mbp that are caused by the stress of carrying it around in a backpack all the time?