No power no video no sleep light no fan movement no hard drive spin no Caps Lock LED when pressed and no display illumination

Note: After each step, check that the system is not supplying power to the logic board. If you see the sleep LED come on or the Caps Lock LED illuminate when the key is pressed, then the system is indeed drawing power. In this case, hold down the power button for six seconds to ensure the system is shut down before working on the computer. At this point, the issue is no longer a 'No Power, No Video' problem. Move on to the "Power, but No Video" troubleshooting section.

Note: Examine the display carefully. An image may be barely present on the screen, but with no backlight clearly illuminating the image. In this case, the system is working properly except for the backlight. Use the "No display or dim display" symptom to resolve this issue.

  1. Remove any connected peripherals.
  2. Check that the battery has enough charge to start the computer by pressing the button next to the LEDs on the battery (on the bottom of the machine). At least one LED must light continuously (not flashing). Make sure the battery is fully seated.
  3. Connect a known-good Apple 60W MagSafe Power Adapter and power cord to a known-good power outlet. If the cord is properly inserted, the LED should light up; if not, go to the "MagSafe power adapter" symptom.
  4. Check for damaged pins or magnetic debris on MagSafe power adapter. If pins are okay, reseat power adapter connector and make sure it is fully inserted. Refer to Knowledge Base articles 303566 "MacBook Pro: Troubleshooting MagSafe power adapters with stuck pins" and 302461 "Portable Computers: Troubleshooting power adapters."
  5. Try powering up without the battery installed. If it starts up, try a known-good battery. If it does not boot, replace the battery connector cable.
  6. Press Caps Lock key to see if light on key comes on. If it does, hold power button down for six seconds to shut down the computer and restart.
  7. Reset PRAM. Restart the computer, then hold down the Option-Command-P-R keys until you hear the startup sound at least one additional time after the initial startup sound.
  8. Reset the SMC. See Knowledge Base article 303319, "Resetting MacBook and MacBook Pro System Management Controller (SMC)'; Resetting the SMC means you will also need to reset the date and time (using the Date & Time pane of System Preferences).

Warning: Make sure you do not hold down the "fn" key when resetting the SMC.

  1. Try to power up the system and check the sleep indicator. If the LED lights up solidly and turns off, the logic board is getting power and completing the boot cycle. Go to the "Power, but No Video" troubleshooting section.
  2. Verify that the power button cable is connected properly to the top case flex cable assembly and that the flex cable is connected correctly to the logic board. Try turning on the system.
  3. Disconnect the top case. Inspect the connectors. With the top case removed, restart the system using the on-board startup jumper pads, as shown below. If it starts up, replace the top case.

Caution: Use a jeweler's flat-blade screwdriver that is just wide enough to short the two small solder pins (jumper pads) located directly below the power symbol.

Macbook Start Two Pads
  1. Test each RAM slot individually with known-good RAM. (The computer should still start with only one known-good DIMM.)
  2. Try removing the AirPort Extreme card from its socket and start the computer. If it starts, shut it down and check the flex cable connector and the connector on the logic board and replace the damaged parts.
  3. Reseat these cables:
  • Hard drive flex cable (will start up to flashing folder if not connected or corrupt)
  • Optical drive flex cable
  • Trackpad flex cable
  • LVDS cable
  • Battery connector with sleep switch cable
  1. If computer starts on battery power only, replace MagSafe board with a known-good MagSafe DC-in board.
  2. If computer starts up, inspect any suspect flex cable connectors and their terminals on the logic board for damage and replace any damaged parts.
  3. Replace logic board.
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Responses

  • Mhret
    Where are small power pads macbook logic board?
    7 years ago
  • MILEN
    What does it mean when cap locks and keypad light, and hardrive light are blinking?
    7 years ago
  • matthias
    Did not shut down MacBook pro correctly. will not turn on. no lights?
    7 years ago
  • Clara Marshall
    How to short the board booting macbook without topcase?
    7 years ago
  • mebrahtu
    What does it mean when only the caps light work when trying to power on a powerbook g4 17?
    7 years ago
  • ROBERT
    How to short power pads on logic board?
    7 years ago
  • julia
    Where to find the jumper pads to start macbook pro?
    7 years ago
  • ruby
    How to properly pin hdd power and led cable?
    7 years ago
  • nuguse
    Where is the onboard startup jumper pads on MacBook?
    7 years ago

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