What do I do if my Mac won't turn on?

Work through these steps in order: (1) Check the power source and charger cable, (2) Perform a hard reset by holding the power button for 10 seconds, (3) Reset the SMC on Intel Macs, (4) Try a different power cable or adapter, (5) Disconnect all peripherals and try again, (6) Boot into Safe Mode, (7) Enter macOS Recovery Mode and run First Aid, (8) Test with an external display to rule out a display fault. Most startup failures are resolved by one of these steps.

My Mac makes no sound and screen is black — is it dead?

Not necessarily. A completely black screen with no fan activity usually indicates a power delivery issue — the most common causes are a flat battery that needs 15+ minutes of charging before it can start, a faulty charger cable, or a hung power state that a hard reset (hold power for 10 seconds) can clear. Try charging for 20 minutes and performing a hard reset before assuming hardware failure.

What does it mean when a MacBook has a black screen but the fan is running?

Fan running with a black screen means the Mac is starting but not displaying anything. Causes include: display backlight failure (test with a torch — look for a faint image), a failed display cable (common on MacBook Pros that hinge between the display and body), or a GPU fault. Connect an external monitor to determine if the Mac is actually starting successfully — if the external monitor shows your desktop, the fault is in the display assembly.

Will a Mac that won't turn on lose all my data?

In most cases, no. The majority of startup failures are software or power-related — the data on the SSD is intact even if the Mac cannot boot. Hardware failures like a dead battery or failed logic board do not directly affect SSD data. Even in logic board failure cases, the SSD can typically be read using specialist equipment. ZA Support retrieves data from non-booting Macs regularly.

How do I reset a Mac that won't turn on using SMC?

On a 2017 or later Intel MacBook: hold Shift + Control + Option (all on the left side of the keyboard) + the Power button simultaneously for 10 seconds. Release all keys. Press Power to start normally. On a pre-2017 Intel MacBook with removable battery: remove the battery, hold the Power button for 5 seconds, reinstall the battery, press Power. Apple Silicon Macs have no SMC — skip this step.

How much does it cost to fix a Mac that won't turn on in Johannesburg?

Cost depends on the cause. ZA Support offers a assessment assessment — we identify the exact fault and quote before any work begins. Software fixes, hardware repairs, and logic board repairs are all quoted individually after diagnosis. Assessment: R899 ex VAT. Hyde Park, Johannesburg.

Mac Won't Turn On? Work Through This Checklist First | ZA Support Blog

Before You Panic: Most Mac Startup Failures Are Fixable

A Mac that will not turn on is alarming, but in the majority of cases it is not a hardware failure. After 16 years of Mac repairs in Johannesburg, the most common causes we see are: a completely flat battery, a corrupted startup volume, a hung sleep state, or a failed macOS update that left the machine mid-boot.

This is a self-service checklist. Work through each step in order and stop when your Mac starts. If you reach the end without success, the problem is hardware — and that is what we are here for.

**Note:** This guide is about diagnosing and resolving startup issues yourself. If you need a repair service, see our [MacBook not turning on repair page](/macbook-not-turning-on).

Step 1: Check the Power Source

This sounds obvious, but it is the most frequently skipped step.

What to check:

If you are on a MacBook:

Is the charger cable securely connected at both ends — at the wall socket and at the MacBook?

Is the wall socket working? Plug a phone charger into the same socket to confirm.

Is the power adapter LED lit? On MagSafe chargers (older MacBooks), a green or amber LED confirms the adapter is working. On USB-C chargers, there is no visible indicator — try a different USB-C cable or adapter if you have one.

If the battery was completely drained, leave it charging for at least 15 minutes before pressing the power button. A fully discharged battery may not respond immediately.

Power LED indicator (older MacBooks with MagSafe):

Amber / orange = charging

Green = fully charged

No light = adapter not connected, faulty cable, or faulty power board on the Mac

If the charger shows no light at all and you have confirmed the socket is working, the issue may be with the MacBook's charging circuit rather than the battery. Note this and continue through the checklist.

Step 2: Perform a Hard Reset

A hung or frozen power state can prevent the Mac from starting normally. A hard reset forces all power to cycle.

Intel Mac (MacBook):

Hold the power button continuously for 10 full seconds until the Mac completely powers off (you may feel or hear a click). Release. Wait 5 seconds. Press the power button once normally.

Apple Silicon Mac (M1, M2, M3, M4):

Hold the power button for 10 seconds. The Mac will power off. Release. Wait 5 seconds. Press the power button once normally.

Mac desktop (iMac, Mac mini, Mac Pro):

Disconnect the power cable from the wall. Wait 15 seconds. Reconnect. Press the power button.

If you hear startup sounds (fan spin, hard drive activity, or startup chime on older models) but nothing appears on screen, proceed to Step 6.

Step 3: Reset the SMC (Intel Macs Only)

The SMC (System Management Controller) on Intel Macs manages power delivery, startup behaviour, and thermal management. A corrupted SMC state can prevent the Mac from powering on correctly even when all hardware is functioning.

Intel MacBook (non-removable battery, 2017 and later):

Shut down the Mac. Hold Shift + Control + Option (left side) + Power button simultaneously for 10 seconds. Release all keys simultaneously. Press the Power button to start.

Intel MacBook (removable battery, pre-2017):

Shut down. Remove the battery. Hold the Power button for 5 seconds. Reinstall the battery. Press the Power button.

**Apple Silicon Macs (M1 and later):** No SMC exists. Skip this step.

After the SMC reset, attempt to start the Mac normally. If you see charging behaviour change (MagSafe LED changes colour, or the Mac begins drawing charge), the SMC reset has taken effect.

Step 4: Try a Different Power Outlet and Cable

Faulty power cables are more common than people expect, and a partially failed cable can prevent charging without showing any obvious signs of damage. Fraying near the connectors is the most common failure point on both MagSafe and USB-C cables.

If you have access to a friend's compatible MacBook charger, test with that. For USB-C MacBooks, any USB-C cable rated for power delivery (not a data-only cable) should work for testing purposes.

If the Mac starts successfully with a different cable, the problem was the original charger.

Step 5: Check for External Display or Peripheral Conflicts

Some Mac startup failures are display-related rather than power-related — the Mac is actually starting, but nothing is appearing on screen.

Try this:

Disconnect all external monitors, USB hubs, dongles, and peripherals

Disconnect any external hard drives or USB drives

Attempt to start the Mac with only the power cable connected

On MacBooks, after disconnecting everything, press the power button and listen carefully. If you hear fan activity, keyboard backlight activation, or any startup sounds, the Mac is starting but the display may be the issue.

**Brightness check:** On MacBooks, try pressing the brightness increase key (F2 or the dedicated brightness key) several times after pressing Power. If you see any change in screen brightness, the Mac is on and the backlight level was simply at zero.

Step 6: Boot into Safe Mode

Safe Mode loads a minimal version of macOS, bypassing third-party extensions and running a basic file system check. If the Mac starts in Safe Mode but not normally, the problem is a software conflict or a corrupt system file.

Intel Mac:

Shut down. Press and hold the Shift key. Press the Power button. Keep holding Shift until you see the login screen (it will say "Safe Boot" in the top-right corner).

Apple Silicon Mac:

Shut down. Press and hold the Power button. Keep holding it until you see "Loading startup options." Select your startup disk. Hold the Shift key. Click "Continue in Safe Mode."

If Safe Mode works: your normal startup is being blocked by a third-party kernel extension, a startup item, or a corrupted login item. Common causes: a recently installed application or macOS update that did not complete cleanly.

If Safe Mode also fails: the issue is hardware or a more serious system software fault. Continue to Step 7.

Step 7: Enter macOS Recovery Mode

Recovery Mode allows you to repair the startup volume, reinstall macOS, or restore from a Time Machine backup — without the Mac needing to boot normally.

Intel Mac:

Restart (or press Power if the Mac is off). Immediately hold Command + R. Hold until you see the Apple logo or spinning globe. Release.

Apple Silicon Mac:

Press and hold the Power button until "Loading startup options" appears. Select "Options" then click Continue.

In Recovery Mode, try these in order:

1. **Disk Utility → First Aid on your startup volume.** This checks and repairs the file system. Many startup failures are caused by a corrupted journal that First Aid can fix in 2–5 minutes.

2. **If First Aid finds errors it cannot repair:** Use Disk Utility → Erase (this erases all data — only do this if you have a backup) and then reinstall macOS from the Recovery menu.

3. **Reinstall macOS:** In the Recovery main menu, select "Reinstall macOS." This reinstalls the operating system over the existing installation without erasing your data. It requires an internet connection. This resolves startup failures caused by a corrupted system installation.

Step 8: Check for Display vs Power Failure

If the Mac appears to be powering on (fan spins, keyboard lights activate) but the screen shows nothing, the problem may be the display rather than the Mac itself.

Test with an external monitor:

Connect the MacBook to an external monitor via HDMI or USB-C to DisplayPort. If the external monitor shows your desktop, the MacBook's internal display or its cable connection has failed. This is a hardware repair — not a data loss situation.

Flashlight test for backlight failure:

In a dark room, hold a torch directly against the MacBook screen and look closely. If you can faintly see the desktop or a login prompt through the screen when lit this way, the display backlight has failed. The Mac is working; only the backlight is not.

If None of These Steps Work

If you have reached the end of this checklist and the Mac still will not start, the fault is hardware. The most common hardware causes of a Mac that will not turn on are:

**Failed logic board** (power delivery circuit, often from a surge event or liquid exposure)

**Dead battery** that will not hold enough charge to initiate startup

**Failed SSD** (the Mac starts but cannot load an OS)

**Display cable failure** (Mac starts but shows nothing)

We diagnose each of these at ZA Support using a DC bench power supply (we bypass the battery entirely to test the logic board), a thermal camera, and direct schematic tracing. Most cases are diagnosed within an hour.

Assessment: R899 ex VAT assessment. Assessment: R899 ex VAT. [Read about our MacBook not turning on repair service](/macbook-not-turning-on) or contact us directly.

WhatsApp us on [064 529 5863](https://wa.me/27645295863) — we are based at Hyde Park, Johannesburg, 7 days a week.