The fan runs. and I have a lot of ventilation.
Just so you know. I fired up the machine a few minutes ago and didn’t do anything.
Just sat here, and it just shut down completely, powered down for no reason.
I am going to double check my power settings, but I usually have them all turn off.
but sometimes it works for a while?
which is the weird part. loose wire connection inside somewhere?
The housing fan is usually not the same as the cpu fan, unless the company is really, really skimping on the product. Your problem sounds heat-related, but leaking capacitors could be at fault as well. If a separate, verified power supply and new battery do not solve your problems (and actually, even if they do) considering the age of the machine you should still have a professional go through it.