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IMac 27inch won't boot up

Paul Bade Sep 29, 2012

Do you get a gray screen with a flashing question mark in the center, or some other display? Do you hear a start-up chime, a series of tones, or at least a fan running? Does it sound normal, but show a black display? Your response will help us shorten the list of possible faults to check.

1 Answer

Doctor PC

Master 7,733 Answers
Posted on Mar 03, 2015

Doctor PC

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Power issues After ruling out display issues, and if your computer won't turn on, try each of these steps.

Verify you have a good connection from your Mac to the wall outlet by confirming the power cord and adapter are securely connected and plugged in. To check if the wall outlet is working, plug in a lamp or other electrical device
If the wall outlet is working and you continue to have no power, try another power cord or adapter if available. If it works you may need a replacement cord or adapter. If you're using a Mac notebook, see Apple Portables: Troubleshooting MagSafe adapters for further troubleshooting with MagSafe adapters.
Disconnect all accessories that are plugged in to your computer. This includes things like printers, USB hubs, or mobile devices.
Hold down the power button for ten seconds. Then, press the power button again to see if the computer turns on.
Reset the SMC.
If you recently installed memory or a drive in your Mac, make sure it's compatible, supported, and installed correctly. If possible, reinstall the original memory or drive to see if the issue persists afterwards.
If you're still unable to start up your computer after trying each of these steps, visit an Apple Store or Apple Authorized Service Provider (AASP) for further diagnosis. If you plan to visit an Apple Retail Store, make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/ (available in some countries only).

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2 Related Answers

Jim Thomson

1099 Answers
Posted on Mar 28, 2012

SOURCE: my computer won't boot from the new disk warrior

Usually three beeps indicate a problem with the RAM, reseat the RAM and then try to boot up with disk warrior. Hope this hels.

Laurie

15 Answers
Posted on Apr 09, 2013

SOURCE: my computer won't boot from the new disk warrior

If you try to use a diskwarrior CD (as I just did on my iMac running 10.7.3) you will get 3 beeps. I used the DVD version they sent me and it works. It takes a really, really long time to boot, so be patient.

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www.dell.com/support/drivers/us/en/04/DriverDetails/DriverFileFormats?c=us&l=en&s=bsd&cs=04&DriverId=R102523

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Trustworthy Expert Solutions

IMac 27inch won't boot up

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Doctor PC

2 Related Answers

Jim Thomson

Laurie

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How to install El Capitan with USB bootable stick on iMac 2010 27inch desktop. The hard drive is completely empty.

Mac g4 added more memory won't boot up

IMAC G-5 POWER PC......Computer Will NOT Boot Up...It Tries to, and while Doing so, it makes a very loud "Wooshing Sound", like a Fan or Drive Spinning at Incredible Fast Speed...occasional clicks, Bu

My iMac froze and won't reboot

My mac won't start

Why won't disk insert into iMac

Imac won't detect keyboard

My computer won't boot from the new disk warrior

Software CD won't work in the iMac

I have a apple Imac g5 that only boots colored screens

Not finding what you are looking for?

Computers & Internet

How to install El Capitan with USB bootable stick on iMac 2010 27inch desktop. The hard drive is completely empty.

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Trustworthy Expert Solutions

IMac 27inch won't boot up

1 Answer

Doctor PC

2 Related Answers

Jim Thomson

Laurie

Add Your Answer

Attachments: Added items

Related Questions:

How to install El Capitan with USB bootable stick on iMac 2010 27inch desktop. The hard drive is completely empty.

Mac g4 added more memory won't boot up

IMAC G-5 POWER PC......Computer Will NOT Boot Up...It Tries to, and while Doing so, it makes a very loud "Wooshing Sound", like a Fan or Drive Spinning at Incredible Fast Speed...occasional clicks, Bu

My iMac froze and won't reboot

My mac won't start

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Imac won't detect keyboard

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Software CD won't work in the iMac

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How to install El Capitan with USB bootable stick on iMac 2010 27inch desktop. The hard drive is completely empty.

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