Solved! Laptop shuts down randomly (on battery)

[hp650_problem]

Hi!
I have a HP 650 Notebook. Recently, it started shutting down randomly (only on battery). I know for a fact that it's not a heating problem. I've been monitoring the temperature of the CPU, and it's never higher than 54C. The thing is, I can immediately turn on the laptop without plugging the charger in. This, supposedly, means that there's nothing wrong with the battery, either. One more nothing, I don't know if it's a coincidence, but a couple of times the laptop shut down as soon as the fans started working.

 

[hang-the-9]

Sounds like the motherboard is failing.

 

[hp650_problem]

Sounds like the motherboard is failing.

But this is the only problem I have. The laptop never crashes nor does it take a long time to boot. It works just fine on AC for 8-10 hours/day.

 

[hang-the-9]

Sounds like the motherboard is failing.

But this is the only problem I have. The laptop never crashes nor does it take a long time to boot. It works just fine on AC for 8-10 hours/day.

Not a lot of things can cause sudden shutdowns, maybe a bad battery, but most often it's a motherboard issue. Could be the connection to the battery.