I unplugged the Thunderbolt cable several times but it still didn't work.
#Macbook no sleep mac
This morning when I powered up, the monitor would not wake up or I assume the Mac mini did not recognize the monitor. For example, last night I shut down the computer completely just to leave it off and not worry about the problem overnight. However the problem I have persists even on startup of the new computer. So the problem persists anytime you just want to lock your screen to step away from your desk. I assumed "sleeping" had to do with the computer and not the display, meaning certain systems in the computer would not "sleep."Īlso, even if I use a hot corner to enable Lock Screen when I step away from the computer for 10 minutes or so, the Lock Screen will eventually "sleep" the monitor - even though I have "Turn display off after" set to 3 hours. Replace the logic board.The box I have checked (since yesterday) in Energy Saver says "Prevent computer from sleeping automatically when the display is off." That's the only box that has to do with sleep that I can find. If the computer starts up, inspect any suspect flex cable connectors and their terminals on the logic board for damage and replace any damaged parts.ġ4.
Try removing the AirPort Extreme card from its socket and start the computer. With the keyboard disconnected,restart the system using the on-board startup jumper pads. 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. Go to the Power, but No Video troubleshooting section.ħ. If it turns on solid and turns off, the main logic board is getting power and completing the boot cycle. Try to power up the system and check the sleep indicator. Manager (SMC) heading in the Hardware Troubleshooting Tools and Tips section.Ħ. See the procedure under the Resetting the Power If the battery is fully depleted and no 85W adapter is available, allow the battery to charge first before turning on the system.ĥ.
#Macbook no sleep portable
Note: With the MacBook Pro (15-inch 2.4/2.2GHz), unlike previous models, if you use the MacBook Apple 60W Portable Power Adapter to power the system, the battery will need a minimum charge to be able to boot the system. If it does not boot, replace the battery connector cable.
Try powering up without the battery installed. If the DC plug is properly inserted, the LED should light up if not, go to the MagSafe connector troubleshooting section.Ĥ. Connect a known-good Apple 85W Portable Power Adapter and power cord or plug to a knowngood power outlet. At least one LED must light solid (not flashing). 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). Remove any connected peripherals and eject any ExpressCard.Ģ. Use the ‘Display: Dim Video’ troubleshooting section to resolve this issue.ġ. In this case, the system is working properly except for the backlight. An image may be barely present on the screen, but with no backlight clearly illuminating the image. Move on to the Power, but No Video troubleshooting section. At this point, the issue is no longer a ‘No Power, No Video’ problem. In this case, hold down the power button for six seconds to insure the system is shut down before working on the machine. 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. Note: After each step, check that the system is not supplying power to the logic board. The computer will not power on (no sleep light, no fan movement, no hard drive spin-up,no Caps Lock LED illumination when pressed, and no display illumination). AppleCK, you may want to try the Apple way first:"
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