How do I reset MacBook Air when it won't turn on

"How do I reset MacBook Air when it won't turn on: […]I went to the Apple Store they told me they have to change something inside and it costs a ridiculous amount of price. I got the computer at that price 3 years ago. Since my warranty ended, I am left with a dead MacBook."

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And what did they say you had to have replaced?

Links to go by:

Troubleshooting Mac Power:

A. Black Mac Screen:

Go Here: If your Mac doesn't Turn On or Start Up - Apple Support

Using External Devices: Try Resetting the SMC and NVRAM, but this time, using an external keyboard. Connect an external monitor and see if you get an output.

B. Mac Power Issues:

Try a New Charger:

If it is currently charging from a charger, then use a new charger:

• Power & Cables - Mac Accessories - Apple - Select "Mac Compatibility" on the left
• Find the right power adapter and cable for your Mac notebook - Apple Support

C. A Few Links to Refer to Power:

• If your Mac doesn't Turn On - Apple Support

• How to Turn your Mac On or Off - Apple Support

• About Mac Notebook Batteries - Apple Support

• Charge the MacBook Pro Battery - Apple Support

• If your Mac Battery won't Charge - Apple Support

You can provide Apple with product feedback here:

Product Feedback - Apple

Or you can contact Apple corporate to let them know how you feel (this is the better option to get their attention).

Contact - How to Contact Us - Apple

Hardware can fail at any time. You can repair or replace the device if you so wish.