sounds like a logic board problem or a corrupted OS. are you getting any beeps?4GB ram and I replaced the HD with an SSD a couple years ago
Tried the SMC and PRAM reset but still having the same issues. Random crashes at times when opening apps or going to more intense websites. Guess I'll just wait for a new MBP release.
anyways,
just bought a 500 gb samsung 850 evo for my 2012 mbp. really want the newest mbp since its so light compared to this 2012 macbook pro.
sadly im broke so the best I can do is upgrade this joint