fan not working

What is the exact model of your Mac? You can get this information by entering your system serial number here:

Check Your Service and Support Coverage - Apple Support

Try an SMC Reset.

Does the Magsafe LED light up at all? Is it amber or green?

If your MagSafe cable or power adapter isn't working - Apple Support

When was the last time you powered on this Mac? If the battery has been left discharged for any length of time it can prevent the laptop from power on or even charging.

Welcome Richard743,

It's hard to say what may be happening with your MacBook Air. If it doesn't start up, then we'd recommend taking these relevant steps: If your Mac doesn't turn on - Apple Support

If your Mac doesn't turn on

If your Mac doesn't seem to turn on after you press the power button, follow these steps.

1. Make sure that your Mac is connected to AC power. If it doesn't have a built-in display, make sure that your external display is connected to power, connected to your Mac, and turned on.

2. Press and hold the power button on your Mac for at least 10 seconds, then release.

Every Mac has a power button. On notebook computers that have Touch ID, press and hold Touch ID.

3. If you see no change on your Mac, press and release the power button normally.

4. If your Mac now turns on but stops at some other screen during startup, follow the steps for when your Mac doesn't start up all the way.

If your Mac still doesn't turn on, please contact Apple Support.

For an Intel Mac, you could also try resetting the SMC or System Management Controller, which handles the power management: How to reset the SMC of your Mac - Apple Support

In case these steps don't help, then we'd recommend bringing it in for an inspection:

Mac Repair - Official Apple Support

Get prepared for your visit: Get your Mac ready for service - Apple Support

To check your coverage, go to: Check Your Service and Support Coverage - Apple Support

Select your region and search nearby for locations: Find Locations

Hoping this helps out, take care.

richard743 Said:

"fan not working: computer won't start , can fan not working keep computer from starting?"

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Troubleshooting MacBook Air Power:

As for replacing that battery, that may not be necessary. Try troubleshooting it.

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