I have a 2010ish MacBook Pro that was working fine this morning. I installed a new version of the Dropbox client and rebooted. It now won't boot up. No video, no chime. It does, however, hit the SuperDrive.

Any suggestion how to troubleshoot? I can't get into safe mode or single-user mode or anything.

  • Do you have the default HDD or is it a SSD? If it's a HDD can you hear it spin when you hit the power button? – Dima Aug 7 '15 at 2:07
  • I'd try resetting the SMC – Tetsujin Aug 7 '15 at 6:49
  • It has an SSD. I also noticed when I turned it on in the dark that the loading progress bar shows up very faintly but about ⅓ of the way through the process the video dims to 0 and I can't see anything. – Steve Ross Aug 7 '15 at 16:31
  • I tried resetting the SMC by making sure the computer was off and then using ctrl+option+shift+power but there is no flash of the power connector and no visible or audible confirmation. I then powered it on and it still behaves the same. No boot sequence. – Steve Ross Aug 7 '15 at 19:21

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