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Computer doesn't start up

Computer was running on battery power. Battery ran low and computer turned off. I connected the computer to the wall outlet but I get no indicator light on the power connection where it plugs into computer. I have verified that the wall outlet is working. I am assuming a faulty power adaptor except that when I measure the output of the power adaptor with a volt meter I get two pins each with 6.5V on them. Do you know if this is correct?

Also, is there any kind of reset on the computer? I have seen some that have a small hole that accepts the straightend end of a paper clip in order to reset some sort of trip.

Thank you for your time

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Mine does this sometimes. Usually when I let the battery run all the way down while I'm still using it.  
What I do is attach the power cord. Then I sort of flex the magnetic  connection up and down to see if the light will flick on. If so, I then press the esc or space bar, or clik the track pad a couple of time to jar it out of the sleep mode.   This is especially useful if I have unsaved work that I was working on before the battery ran down.  
Otherwise, you just leave it plugged in for about 10 minutes to let it charge some. Press the button on the bottom of the batter to see if the charge has built, then try to wake it up with some of the previous mentioned tactics above.  
And if that doesn't work, just hold down the power key til you hear it clik or power down, then hold it down again til you hear a loud beeeeeeeeep noise. Then release it.  The computer should then restart...but any unsaved work will be lost.  : (

Hope this helps!
Let me know!
Enov8

Posted on Mar 04, 2009

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Reset is take the battery out hold the power button down 15sec obviously with the lead in

actionman

Posted on Feb 27, 2009

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Why wont my computer turn on macbook air. what do you think?


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Computer will not turn on even with power cord


1. Disconnect any devices connected to the computer including printers, hubs, and third-party keyboards or mice, and test the computer again by trying to turn it on.
2. Find out whether the battery on your Apple portable has power. Press the small button on the side or bottom of the computer, depending on the model. Lights should indicate the battery's level of charge. A single blinking light means the battery needs to be recharged. Connect the adapter to recharge the battery.
3. Unplug the power adapter from the electrical outlet and from the MacBook Pro. Wait one minute. Plug it back into the wall first, then to the computer. Make sure the electrical outlet is working by plugging in another device (such as a lamp). When you plug the adapter back into the computer, the power adapter LED should light up green or amber. If the light does not come on or the computer continues to not power on, proceed to step four.
4. Inspect your MagSafe power adapter. See Apple Portables: Troubleshooting MagSafe adapters for instructions on cleaning the adapter and more details for these steps:
  • Check the MagSafe connector on the adapter for any bent or damaged pins, debris, or alignment issues with the connector.
  • Check the MagSafe connector on the computer for any debris, damaged pins, or alignment issues.
  • Check the MagSafe adapters cabling for any wear or cable issues.
5. Make sure you are using the adapter that was designed for your computer. If you aren't sure or if you need a different adapter, learn which adapter is appropriate for your computer.
6. Review the steps for resetting the SMC (System Management Controller) on your Apple portable computer.
7. If you recently installed additional memory or a hard drive not made by Apple, make sure it is installed correctly and is compatible with your computer.
8. If you are still unable to start up your computer after trying each of these steps, schedule a service appointment with an Apple Retail Store or an Apple Authorized Service Provider.

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1 Answer

Lap top won't come on


Hi,

Follow the steps below and it should solve your mac problem..

  1. Disconnect any devices connected to the computer including printers, hubs, and third-party keyboards or mice, and test the computer again by trying to turn it on.
  2. If you're using a MacBook or MacBook Pro, check the battery level. Press the small button on the battery or on the side of the computer. You should see lights indicating the battery's level of charge. If you see just one light blinking, the battery needs to be recharged. Use the fluorescent pen computer with the adapter connected to recharge the battery.
  3. Unplug the power adapter from the electrical outlet and from the MacBook, MacBook Air, or MacBook Pro. Wait one minute. Plug it back into the wall first, then to the computer. Make sure the electrical outlet is working by plugging in another device (such as a lamp). When you plug the adapter back into the computer, the PowerBook G4 Battery 15" power adapter LEDs should light up green or amber.
  4. Inspect the MagSafe port on the computer for debris, such as metal stuck to the magnet in the port, which might prevent the connector from seating properly. On the adapter side, look at the DC connector for dust or other debris and check whether pins are missing, bent, or stuck down. If you find any of these to be true, see Apple Portables: Troubleshooting MagSafe adapters for instructions on cleaning the adapter.
  5. Make sure you are using the adapter that was designed for your computer. If you aren't sure or if you need a new adapter,learn which adapter is appropriate for your computer.
  6. Press the control key, the command key, and the sony vgp-bps13a/b battery power button simultaneously and hold for three seconds to try to restart the computer.
  7. Reset the PRAM. After pressing the power button, hold down these keys simultaneously: Command-Option-P-R, until you hear the startup chime at least one additional time after the initial startup chime.
  8. Reset the SMC for the MacBook And MacBook Pro by removing the AC power, removing the sony vgp-bps13 battery and then holding down the power button for five seconds. On the MacBook Air, press (left) Shift-Control-Option along with the power button once. Note: You must use the keys on the left side of the MacBook Air keyboard.
  9. If you recently installed additional memory, make sure it is correctly installed and is compatible with your computer. Remove the new memory to see if the computer starts up properly without it.
  10. If you are still unable to start up your computer after trying each of these steps, schedule a service appointment with either an Apple Retail Store or an Apple Authorized Service Provider.
Regards,
Ron

Jun 02, 2011 | Apple 13" MacBook Notebook Computer ...

2 Answers

My laptop has suddenly frozen, i turned it off by the power button and whenever i try to turn it on it turns white screen, then shutsoff after 3-5minutes.


Resolution
  1. Disconnect any devices connected to the computer including printers, hubs, and third-party keyboards or mice, and test the computer again by trying to turn it on.
  2. If you're using a MacBook or MacBook Pro, check the battery level. Press the small button on the battery or on the side of the computer. You should see lights indicating the battery's level of charge. If you see just one light blinking, the battery needs to be recharged. Use the computer with the adapter connected to recharge the battery.
  3. Unplug the power adapter from the electrical outlet and from the MacBook, MacBook Air, or MacBook Pro. Wait one minute. Plug it back into the wall first, then to the computer. Make sure the electrical outlet is working by plugging in another device (such as a lamp). When you plug the adapter back into the computer, the power adapter LEDs should light up green or amber.
  4. Inspect the MagSafe port on the computer for debris, such as metal stuck to the magnet in the port, which might prevent the connector from seating properly. On the adapter side, look at the DC connector for dust or other debris and check whether pins are missing, bent, or stuck down. If you find any of these to be true, see Apple Portables: Troubleshooting MagSafe adapters for instructions on cleaning the adapter.
  5. Make sure you are using the adapter that was designed for your computer. If you aren't sure or if you need a new adapter, learn which adapter is appropriate for your computer.
  6. Press the control key, the command key, and the power button simultaneously and hold for three seconds to try to restart the computer.
  7. Reset the PRAM. After pressing the power button, hold down these keys simultaneously: Command-Option-P-R, until you hear the startup chime at least one additional time after the initial startup chime.
  8. Reset the SMC for the MacBook And MacBook Pro by removing the AC power, removing the battery and then holding down the power button for five seconds. On the MacBook Air, press (left) Shift-Control-Option along with the power button once. Note: You must use the keys on the left side of the MacBook Air keyboard.
  9. If you recently installed additional memory, make sure it is correctly installed and is compatible with your computer. Remove the new memory to see if the computer starts up properly without it.
Also:
The MacBook SMC Firmware Update v1.1 improves the MacBook's internal monitoring system and addresses issues with unexpected shutdowns. This update is recommended for all MacBook systems, including those that received warranty repair.
You can use the Software Update feature of System Preferences, or download the MacBook SMC Firmware Update v1.1 from Apple Software Downloads.
Note: If your MacBook is running Mac OS X 10.4.6, you won't be able to see the SMC Update until you update to Mac OS X 10.4.8. Once you have updated your system software, the SMC Update will appear as an option in Software Updates.
MacBooks running Mac OS X 10.4.7 will be able to download and install the SMC Update, so it is not essential that you update your system software, although Apple always recommends updating to the latest version of the system software.
If your MacBook is in a state where it will not remain on long enough to install the update, wait for the issue to reproduce itself. Once the MacBook has turned itself off, turn the computer on by holding the power button down. Keep the button down until you hear a single long tone. Once you hear the tone you can release the button, install the recommended updates, and restart normally.

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1 Answer

Will boot up on charge but when in the process of starting up will turn off again


If you can take the battery out of the computer. plugin the power adapter to the computer and the wall start the computer using only the power adapter for your source of power.
If everything starts up normally you will need to replace the battery.

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1 Answer

Macbook a1181 works for a couple days and then does not want to start again for another couple days. please advise


Your best bet is to reset the System Management Controller;
(I'm not sure if your model has a removable battery or not, so I'm providing both methods)

Resetting the SMC on Mac portables with a battery you can remove
Note: Learn about removing the battery on MacBook and MacBook Pro.

  1. Shut down the computer.
  2. Disconnect the MagSafe power adapter from the computer, if it's connected.
  3. Remove the battery.
  4. Press and hold the power button for 5 seconds.
  5. Release the power button.
  6. Reconnect the battery and MagSafe power adapter.
  7. Press the power button to turn on the computer.

Resetting the SMC on portables with a battery you should not remove on your own
Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).

  1. Shut down the computer.
  2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
  3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
  4. Release all the keys and the power button at the same time.
  5. Press the power button to turn on the computer.
    Note
    : The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.



...and then reset the Parameter RAM:

  1. Shut down the computer.
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  3. Turn on the computer.
  4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
  5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
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If your Notebook computer battery is not charging, try the following:
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    • Make sure your AC adapter is properly inserted into your laptop.

    • Connect your computer to its AC adapter, shut it down, and then let it charge overnight. If it does not charge, it's likely you have a hardware fault in your computer, battery, or adapter, and you should have it repaired.

    • Test your AC outlet. See if your battery will charge if you plug it into a different outlet, or see if another electrical device will work in your original outlet.

    • Test your AC adapter. Try connecting a different AC adapter to your computer and see if it recharges.

    • If it's removable, test your battery. Try using a different battery with your computer and see if it will recharge.

    • In some of the early PowerBooks, the battery will not charge unless the computer is turned on. If you have an old PowerBook and your battery isn't charging while it's turned off, power it on, put it to sleep, and then see if it recharges.
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1 Answer

Laptop crashes (G4) often and boots up to an error message stating the date is before 2001. The date reverts back to 12/31/1969. Programs are out of wack as a result.


sounds like you have a power problem. Can your computer run on the battery? If you run it on the battery and pick it up and jiggle it, does it turn off. The reason the date is reverting to 1969 is because once the computer loses all it's power (battery and cord), it loses all information that requires power, which includes the date. I'm guessing that your power cord requires some tweaking to get it to turn on properly (light up) and that the battery is close to dead or doesn't have a great connection so it sometimes loses contact and your computer just clicks off.

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