MacBook Air won’t start, makes clicking noise

Hello jingjing240,

It sounds like you are hearing a clicking noise when turning on you Mac.

Here are some resources that can help:

When it comes to holding down the power button for a few seconds and not seeing anything on the screen, this would be expected as you are forcing a shutdown as seen here Shut down or restart your Mac.

For the sound, see if one of these articles relates to what you are hearing:

• About fans and fan noise in your Apple product
• If your Mac beeps during startup

For your startup issue see:

• If your Mac doesn't turn on
• If your Mac starts up to an Apple logo or progress bar

If it continues, you may want to Contact Apple Support or this Get Support link for assistance.

Hope this information helps.

Have a good day.