How do I test my iMac power supply with a multimeter?


  1. Turn to AC mode position on the meter. If you have a multimeter has auto detection function, you don’t need to do this step.
  2. First, use two probe plug in two holes of the power supply.
  3. The monitor will show a value of AC voltage. If the source does not have power. It has not value.

How do I reset the power supply on my iMac?

Unplug the power adapter from your Mac and the electrical outlet for several seconds, then plug it back in. Choose Apple menu > Shut Down and wait for your Mac to shut down. Remove and re-insert the battery if it’s removable. Press the power button again to turn on your Mac.

How much is a 2009 iMac worth today?

According to the estimated value is $700 to $900. Similar to selling a car, it will very according to location, condition and extras. When you do sell it be sure to prepare it for sale according to this Apple document: What to do before selling or giving away your Mac – Apple Support.

How long will a 2009 iMac last?

Most tend to agree that an iMac will last a year anywhere from six to eight years. Good years too, not a few good years, then the problems start either. iMac performance is renowned for being consistent over the long-term. In order to extract the most, though, you’ll want to go with the higher-spec models.

What is the power brick for iMac?

Apple just announced the new iMac powered by Apple’s own M1 silicon. Among the numerous updates and upgrades is a new power brick that sports something special to Apple’s lineup: an Ethernet port.

How do I know if my iMac power supply is bad?

Remove the iMac screen from its aluminium frame. Plugin the power cable back to the main powerpoint. Check for the four LED lights on the logic board. If no LED light is on, you have a faulty iMac power supply.

How do I test a Mac power supply?

How to Test a Power Adapter on a Mac

  1. Connect the “Magsafe” end of the connector to the power supply port on the left side of the Mac laptop.
  2. Verify a secure connection.
  3. Turn on the laptop.
  4. Unplug the power supply again from the wall outlet or power strip.
  5. Reconnect the power supply plug to the outlet.

Why is my Mac not charging when plugged in?

Check the power outlet If the power outlet works, connect your USB-C power adapter and try to charge your Mac. If your Mac still won’t charge, shut down your Mac and close the display for 30 seconds, then open the display and try to charge your Mac again. If you’re not using a Mac with Apple silicon, reset the SMC.

How do I fix my iMac if it wont turn on?

Fix the iMac not turning on problem step-by-step

  1. Make sure your iMac is receiving power.
  2. Check for stuck power button.
  3. Check for any faulty external devices.
  4. Reset the SMC or T2 chip.
  5. Perform a power cycle.
  6. Check for signs of power.
  7. Check for a faulty RAM.
  8. Restore corrupted T2 security chip firmware.