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Are internal Apple cables not working?


Why are the internal Apple cables not working? – Updated 2024

  • Power Surge on your Mac
  • Lightning has struck your Mac
  • Load shedding damaging your Mac
  • Faulty Apple charger connected to your Mac
  • The heat from your logic board may have damaged internal cables.
  • Cables may have failed due to wear and tear.

An Apple Mac may not work if internal Apple cables have been critically damaged. There are many reasons which would result in intermittent or permanent failure. It is often difficult to identify the exact root cause, in which case you’ll need to speak to an Apple specialist. 

What are the common signs that Mac’s internal cables have been damaged?

  1. Mac doesn’t turn on.
  2. Mac turns on but the screen remains black.
  3. Mac starts then halfway through the booting up process turns off.
  4. Mac stops charging.
  5. You can hear parts moving inside the Mac but the screen remains off.
  6. The Mac intermittently has problems that seem to occur randomly.

What should you do if you suspect your internal Mac cables have been damaged?

If you have a MacBookPro, MacBook Air or MacBook that’s not turning on try:

  1. Check if there are any signs of external components which have been burnt.
  2. Specifically, look at the MagSafe port to check if there are black marks.
  3. Try and reset the SMC and PRAM. Check out ZA Support’s simple SMC and PRAM reset guide on YouTube how to reset the PRAM and SMC on your Mac.
  4. If this still doesn’t work and you have a Mac where the Apple RAM can be removed try and remove it and see whether the Mac turns on. WARNING removing RAM can cause damage to the Mac if not done properly. If you are not an Apple professional please be careful.
  5. At this point, the damage may be deep within the internal parts of the Mac.

If this is the case you’ll need to book it in with us. 

If you have an iMac or Mac Pro:

  1. Unplug the iMac or Mac Pro from the main power source.
  2. Leave the iMac or Mac Pro unplugged for 5 seconds.
  3. After that, the iMac or Mac Pro should have reset its own SMC controller.
  4. If you need to reset the PRAM on your iMac or Mac Pro you will follow the same steps as if you had a MacBook.

What to do if you’ve tried to correct the problem however, internal Apple cables are still not working?


As you can see there are a lot of factors that can cause internal Apple cables to fail. If you have tried our Mac not powering on expert guide it might be a consideration to bring the Mac in for a diagnostic. If you need to book your Mac in for an Apple diagnostic click here.


If you have your serial number it increases our response time. There's a link at the bottom of this form to help you find your serial number if you are unsure where to locate it.