My macbook (late 2009) is not booting up

..Stemontu:

Any indications of an attempt to start up?

Some noises, are often involved if power

is added; or none, if the hardware is inert.

"Learn what to do if your Mac starts up to a blank screen, such as an empty gray, black, or blue screen."

Other screens may appear to give clues on status.

• If your Mac doesn't start up all the way - Apple Support

https://support.apple.com/en-us/HT204156

• How to Fix a Mac or MacBook That's Not Turning On - MacWorld UK (w/ ads?)

https://www.macworld.co.uk/how-to/wont-turn-on-boot-3423817/

..An older MacBook from Late 2009 may have a failed hard drive..

Reset the SMC:

1. Shut down the computer.
2. Disconnect the MagSafe power adapter from the computer, if it's connected.
3. Remove the battery - if it is user removable.
4. Press and hold the power button for 5 seconds.
5. Release the power button.
6. Reconnect the battery and MagSafe power adapter.
7. Press the power button to turn on the computer.

If there is any expansion seen of the case from where the battery would go on an all in one unit, if the battery is not removable, bring to an authorized service center to have the battery disconnected.

Request to relocate to the proper forum area: