Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Well, when I try to boot it stucks on grey screen with thunderbolt and firewire symbols, it is always trying to boot on target disk mode, I believe its a driver problem with the built-in keyboard, before shuting the computer down it usually got the "t" key held pressed by its own, i tried removing the key and claening under it but the problem remains.

OS X commands for boot don't work, and plugging another keyboard with the USB port doesn't help neither because it takes to long to recognize the external keyboard. Is there a way I can deactivate the built-in keyboard even with no access to the OS?

share|improve this question

I'm not sure, but you can give this temporary solution a try.

Push down every numerical keys or so many keys you can with your fingers, also try other keys than numerical. It may interrupt the boot process to recognize the "t".

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .