Previous shutdown cause: 0 Random shutdowns on my MBP 2012 9,2

[vinivasq]

I have an Macbook Pro 2012 with 10gb of RAM and an SSD for a while now and it started randomly shutting down on itself after a few minutes of work with no warnings or errors showing up on reboot, I’ve tested with de battery disconnected but it still happens, so I don’t think it’s battery related. My power button isn’t working as well so I can’t perform an SMC reset properly. I’m also running Big Sur via Patched Sur but I’ve been using it for about 7 months and no problems so far, it would shut off once in a while but now i can’t get more then 10/15 minutes before the MacBook shuts off and it’s always a previous shutdown cause: 0 Que I run the logs. Also performed an apple hardware diagnosis and nothing showed up. Can anybody help me?

Ps: My power button isn’t working but the MacBook turns on when I plug de AC connector, that’s how I’ve been using it for a while now

 

[maflynn]

I can’t help diagnose the situation but will offer my advice. I would work at retrieving your data (provided you don’t have a backup) and look to replace your Mac.

10 years of usage is an eternity for laptops and the hardware may be failing at this point - kind of like my old body

Good luck

 

[Ruggy]

Have you ever cleaned the dust out of it? It's a very common problem with computers that the vents get choked up with lint over the years and when that happens, they overheat. When they overheat they shut down and seemingly at random.
I have seen exactly this on several computers and in the first instance you can just try blowing them out. Just put your lips together and blow.
If you can take the bottom off then you can do it more thoroughly but be always be careful what you touch in there- don't go using a brush or anything like that. Take your shoes off and make sure of what you wear and where you stand to avoid static. Something like a bike pump, maybe a hiardryer on cold? I don't know I have a paint sprayer with an air function that is brilliant for this sort of thing.
Definitely start there before trying something else.
I even once bought a windows computer very cheaply which was shutting down at random on the hope it was just dust. The heatsink inside looked like it had been stuffed like a cushion and it worked perfectly for years after that.