I have an Acer Aspire 5315-2077 laptop that shuts down 2-4 seconds after booting up. The power light comes on, and the HD and DVD lights illuminate briefly, then it shuts down. During the longer times it stays on (4 seconds) the screen briefly comes on with the "ACER" logo.
I've eliminated heat as an issue based on the short time before it shuts down, so I'm investigating power issues. It shuts down regardless of whether the power supply is plugged in or not, though I've found that it won't boot at all if the battery is removed from the chassis.
I've removed the HD and memory, and tried booting without them... same symptoms. After re-seating them, same symptoms.
I'm suspecting a bad main board, but given that this was a free laptop, I'm not going to invest any money into fixing it. Any last minute ideas to try before I scrap it?