On my 2012 MBP, I have noticed a handful of times where I come back to my computer after an hour or so, and there is a weird login screen. (Trying to remember this exactly.) After logging in, I see this horizontal bar that fills from left to right - almost like an old equalizer display - and the screen is kind of "frosted" then I get a second login prompt. It sort of reminds me of when your computer dies due to a low battery and after dying you immediately plug it in and get that weird sequence as OS-X tries to recover. My laptop is plugged in during this, though. Last night I was editing a music file, was plugged in, and all of a sudden my screen went blank - black I think. I forget what I did next, but suffice to say it was as if someone shut off my computer. (Thank God I had just save the file I was editing so I didn't lose 30 minutes of work.) I had to reboot my computer like it was turned off. What happened last night is very concerning to me, because I can't afford to have my computer randomly die or turn off!! I install a SSD into this old laptop about 6 weeks ago and it has been running fine so far. As some of you may recall, I melted my HDD cable back last summer in the HOT Texas heat. And I also had a thread on here where I was getting all of this strange shutdown behavior when trying to run this old laptop from an external USB hard-drive. (I gave up on that and bought and installed a an internal hard-drive cable and new SSD because I am pretty sure my USB ports are also fried...) What are the chances that this weird shutdown behavior is caused from a faulty SSD? And what are the chances this issue is caused by fried and failing internals on this aging 2012 MBP? I hope it is the latter and not the former, because I have never had a SSD before, and I don't trust them as much as traditional HDDs. What do you think??