|I suspect the blinking light is a network card. |
I'd unplug the AC plug and press power button a few times. The put ac back and test. Take note of any signs of life. Fans, keyboard lights.
If it fails then next step may be to test power supply.
In all of this be careful to AC shocks to you and static damage to boards.
1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.