iMac 5K restarts to a black screen

Question

Level 1

4 points

iMac 5K restarts to a black screen

My brand new iMac 5K starts up normal. I hear the chime. Then the screen goes black.

It will only start when I power it off, then on again. And this happens after every restart. If I restart, I will get the black screen, then I click and hold on the power button, then when it is completely off, I turn it back on, and it will work.

I migrated my old iMac info to my new iMac, so I thought it was from the back up, so I formatted the iMac and started a new clean copy, but the same thing happened.

1. This happens even after a shutdown.

2. I have reset the the System Management Controller (SMC), NVRAM, and nothing happened.

Anyone can help? my new iMac feels so old...

iMac with Retina 5K display, OS X Yosemite (10.10.3)

Posted on Jun 30, 2015 1:02 AM

Reply

Answer 1

Best reply

rkaufmann87

Level 10

140,214 points

Jun 30, 2015 6:09 AM in response to Ahmed Muh

You have 14 days to return the machine for ANY reason if you bought it from Apple. Take advantage of that!

You also have 90 days of Complimentary AppleCare Support, contact Apple immediately!

Reply

Answer 2

ejpeiker

Level 1

18 points

Jul 19, 2015 9:04 AM in response to Ahmed Muh

My new iMac 5K which was just delivered yesterday does exactly the same thing. Restart gets you to the the restart chime and then the screen just stays blank. The only way to restart the computer is to shut it down and the start it up.

Reply

Answer 3

rkaufmann87

Level 10

140,214 points

Jul 19, 2015 10:37 AM in response to ejpeiker

Complimentary AppleCare Support

Reply

Answer 4

ejpeiker

Level 1

18 points

Jul 19, 2015 10:58 AM in response to rkaufmann87

I spent 1.5 hours with AppleCare, with both first line and advanced support and they were unable to get this issue resolved. We tried at least a dozen things from simple PRAM resets to reinstallation of the OS and many other things. The machine works perfectly if power down and start it up but will not restart and goes to a blank backlit black screen after the start-up chime on a simple restart command.

Reply

Answer 5

ejpeiker

Level 1

18 points

Jul 19, 2015 12:37 PM in response to ejpeiker

I just solved the problem. If I unplug my external drive that is being used for a TimeMachine backup, there is no problem with a normal restart. Even after reformatting the external drive, the system will only boot with a cold power down start-up, as soon as I remove the external drive, the restart works again.

Reply

Answer 6

Acp2011

Level 1

0 points

Dec 21, 2015 3:46 PM in response to ejpeiker

The Same thing happened to me . I just purchased a Brand new late 2015 imac 5k retina 1tb Fusion and was so excited. Well excitement turned to pure frustatuon. I would like to add this is an 2 exchange in 2 days. I came home placed imac on desk and booted up fine and then allowed the apple update and when the imac restarted it went to a black screen. I pulled powered and everything else. Spent nearly 2 hours with. Apple care with no resolution. Finally gave up and returned it the next morning, very disappointed. I can't explain how bad I felt no one could help me. Not to mention 2 in a row! I'm don't know what to do now. I couldn't bare a 3rd try at another one. 6 hours in the car driving to the store to replace these brand new imacs. Just speechless...

Reply

Answer 7

ejpeiker

Level 1

18 points

Dec 21, 2015 3:49 PM in response to Acp2011

For me, the problem was resolved by replacing my TimeMachine backup drive.

Reply