Macbook air mid-2013 won't start

My macbook air mid-2013 won't start. I've tried basic steps recommended on Apple's Support site

1) Press & hold Start button 10 seconds then press Start button normally

2) Press & hold Shift, Control, Option, Start 10 seconds then release then press Start normally

but not seeing any signs of life in the laptop. (Charging cable light doesn't come on, no backlight or screen lighting, etc.)

Any suggestions?