.. could be the condenser?
Plug your charger into the unit. (BATTERY OUT OF THE LAPTOP) Attempt to turn it on. Did it boot to desktop?
Plug the battery into the unit. (NO CHARGER) Attempt to turn it on. Did it boot to desktop?
Have you tried going back into the BIOS? Rapidly tap the ESC key or F2 (one of them, I forgot.) Did you boot into the BIOS setup? If you did, did the laptop spontaneously turn off again?
I remember my old laptop wouldn't start unless I dropped it on my knee. It was rather retarded, though I recommend against doing this practice. ;d
❤