Troubleshooting Steps for a 2015 MacBook Pro That Won’t Boot

If your 2015 MacBook Pro is experiencing these symptoms—no display, no sound, and only momentary fan and touchpad activity before shutting down—several possible causes could be at play. Here are steps to help diagnose and potentially resolve the issue.

Troubleshooting Steps for a 2015 MacBook Pro That Won’t Boot

1. Perform an SMC Reset (System Management Controller)

• Shut down the MacBook.
• Connect it to a power source.
• Press Shift + Control + Option on the left side and the Power button simultaneously.
• Release all keys and press the Power button again to see if it powers up normally.

2. Try an NVRAM/PRAM Reset

• Press the Power button and immediately hold down Option + Command + P + R.
• Hold these keys for about 20 seconds, during which the Mac may restart.
• This resets certain settings that can sometimes interfere with booting.

3. Check for Display Issues

• Shine a flashlight at an angle on the display to see if there’s a faint image, which might indicate a backlight issue.
• If you see an image, the MacBook may be working but has a display/backlight failure. You can connect it to an external monitor to verify.

4. Inspect for Signs of Power or Battery Issues

• Disconnect any peripherals.
• If you have a USB-C to USB-A adapter, try connecting an external USB drive or another device to test if power is being delivered.
• Connect a different compatible charger if possible, as sometimes chargers can fail even while showing a charging indicator.

5. Run Diagnostics (If Possible)

• Press the D key while powering on. If Apple Diagnostics starts, it may reveal hardware issues.
• Since the MacBook isn’t showing any screen, this may not work, but it’s worth attempting.

6. Remove or Replace SSD (If Possible)

• If you’re comfortable doing so and have the tools, remove the SSD and then try powering on the MacBook. Without the SSD, the Mac should at least display a folder icon or question mark.
• If the Mac powers on with the SSD removed, it’s likely that the SSD or its connection is the issue.

7. Inspect Logic Board for Physical Issues

• If the MacBook has been exposed to moisture or physical shock, the logic board could be damaged. Signs include corrosion, burnt areas, or damaged connectors.
• While this requires disassembly, it may be worth having a technician or repair shop inspect the board if the simpler steps don’t resolve the issue.

Possible Causes Based on Symptoms

• Faulty SSD: An SSD issue could prevent booting, but the Mac would typically still show the folder/question mark icon. Complete silence with a quick power-down could point elsewhere.
• Logic Board Issue: Frequent in 2015 models, logic board issues can cause symptoms like yours, especially if no display or sound is present.
• Battery or Power Management Issue: If the Mac is shutting off immediately, this might point to a failing battery or SMC problem.

If these steps don’t bring it back to life, the issue may require a professional diagnosis, particularly focusing on the logic board and SSD.