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What to do when your mac doesn't boot

If your Mac does not boot, or is stuck while booting, performing these steps will help you to solve the problem:

First, disconnect all peripherals (printers, cameras, etc...)To make sure your system files are OK, boot the mac holding the shift key to repair disk and to deactivate extensions. If it boots, it will ask for your password. Type your password, if you are able to see the desktop, then your problem can come from a third-party extension. Back-up all your files (mostly located in the home folder) and reinstall your system.
Secondly, if the solution above does not workYou can start to think about a hardware problem. Most of the time, a Mac does not boot because of a dead hard drive. But it can also be a faulty motherboard or RAM. I recommend to test all of these, using your hardware test, following these steps: http://support.apple.com/kb/HT1509 .
At last, If you can't eve test your hardware, think about a dead power supply or a dead motherboard/

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My CPU shows a yellow lite but won't turn on it doesn't boot on


Computer no boot means -a bad cmos, bad hard drive, corrupted OS, bad peripheral, bad memory, bad power supply. Start with the hard drive and perform diagnostics on it. Disconnect everything from mother board - leave just the memory and hook it up to a monitor and turn on. If it does not post cmos is bad - if it does post then something that was disconnected is the cause of the issue.

Sep 16, 2017 | Computers & Internet

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stuck on installing updates


DO THIS FIRST - Perform a hard resetIf a PC suddenly fails to boot properly, you should perform a hard reset as the first action. Performing the hard reset will correct many problems. If the computer still does not start properly, select your symptom from the list below to guide you to the recommended corrective actions.
  1. Disconnect all peripheral devices and remove all USB devices and SD media cards. You want to test the computer not the accessories!
  2. Disconnect the AC power adapter, remove the battery, and then press and hold the power button for at least 15 seconds to drain all residual power and restore default startup settings.
  3. Reconnect the AC power adapter (but do not insert the battery), Press the Power button, Look for glowing LEDs near caps lock and num lock keys, and Listen for sounds of a fan or other moving parts turning.

Feb 18, 2012 | HP Mini 1000 Netbook

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doesnt go to the start page


I would recommend that you try to boot the computer in Safe Mode. This will load the basic drivers and few programs, allowing you to determine if there is a hardware or software issue preventing the machine from performing a standard bootup.

Step 1. Remove any discs in the CD/DVD drives.

Step 2. Power off your computer.

Step 3. Disconnect all devices from your computer except the power cable.

Step 4. Power on your computer, and press the F8 button every second or so until you are brought to the Windows Safe Mode screen.

Step 5. Select the Safe Mode (without networking) option and hit Enter.

Step 6. The machine will then begin to load with the most basic drivers and basic programs.

Step 7. Be patient during this time. It may appear that the machine is stuck. Give it up to 5 minutes.

Step 8. If your machine performs a successful boot, log on with an administrator account.

Step 9. On the Desktop, right-click on My Computer and select Manage.

Step 10. In the Manage Your Computer Console, in the left hand side, expand Event Viewer.

Step 11. Scan through the logs to see if there is any issues recorded during the last successful boot.

Step 12. If you find any issues, read through them carefully to see what they say.

Step 13. Restart your computer and let it perform a regular boot.

Step 14. If you expereince anymore issues, let us know.

May 01, 2010 | HP Pavilion dv9000z Notebook

1 Answer

InstallatIon of Mac OS X 10.4.10


White screen issues on your Macbook are more often than not, an indication that you may have a connected peripheral or device which may be hindering your Macbook's normal start up function

What you need to do first, is remove all peripherals from (printers, scanners, USB drives etc.) and then reboot your Macbook.

If your Macbook starts up normally without a white screen, leave all the peripherals disconnected and see if you can proceed to run all of your software updates, in Apple menu>Software Updates, first, including updating to the final version of Mac OS X 10.4 Tiger, 10.4.11.

Once all of your updates are completed, then you will need to go through a process of elimination by connecting one peripheral at a time, then properly shutting down and restarting your Macbook with each device, to see if your Macbook goes to a White screen.

Depending on the number of peripherals you have normally connected to your Macbook, this may seem a little tedious at first. But considering how bothersome a White screen is, it will be worth it solving the mystery of which peripheral is causing the white screen and failure to boot up normally.

If it turns out that one of the devices you had connected was in fact, causing the white screen, this will be the opportunity for to research online, visiting the affected device's manufacturer's website or even use Google, to confirm if there are any known issues and/or updates available to address that issue.

There are other variables which can come into view with a white screen issue, but this is a good way to start in terms of working toward a viable solution to this issue with your Macbook.

I hope this helps, let me know if you have more questions.

Regards,

-Mactechtrainer
Sr. Mac Support Specialist


Jan 25, 2010 | Apple MacBook 13"White /2.0Ghz Intel Core2...

1 Answer

My mac mini gets stuck on the first screen (gray with the Apple logo and the spinning wheel) and won't continue loading.


Start here...  
Resolve startup issues and perform disk maintenance with Disk Utility and fsck

Mac OS X: How to start up in single-user or verbose mode

If that doesn't help, try booting into Safe Mode and see what happens, if it comes up hopefully another restart may solve, if not, you can at least use this as a starting point to try and resolve. Safe Mode will allow you to get around, surf, etc...
 
What is Safe Boot, Safe Mode?
 
Mac OS X: Starting up in Safe Mode

If Safe Mode comes up alright, I would install AppleJack, excellent troubleshooting article can be found here... Troubleshooting Tools: AppleJack

Another excellent free tool for performing maintenance is Onyx (be sure to download the right version for your system). Install the package, then run it, it will check your drive and the structure, after this, click on the automation tab and check on everything for Maintenance, Clear Cache, Cleaning, and check on Reset -> LaunchServices database and Mail's Envelope Index. When it completes, restart. Repeat any time something seems flaky, if not try to run at least once a month.

Jan 29, 2009 | Apple Mac Mini Desktop

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