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Old Jan 29, 2013, 07:38 AM   #1
windowstomac
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Bizarre Keyboard Problem - Please Help!

Hi there,

I have a major problem.

A whole bunch of keys on my MacBook Pro have gone dead - they are random and not in top left to bottom right lines like I have seen in the past when a keyboard has shorted or has water damage.

More bizarrely still the exact same keys don't work on an external USB keyboard.

I have full disk encryption on. I can't type in my password.

I've seen stuff online about this being related to "mousekeys" but I can't get into OS X. I have reset PRAM and SMC, or at least I think I have, as I can't be sure whether the option and control keys work.

I can't boot to CD as the C key doesn't work.

Please help - I have deadlines!

B
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Old Jan 29, 2013, 07:43 AM   #2
yusukeaoki
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Well did you do water damage or anything you can think of to the computer?
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Old Jan 29, 2013, 02:45 PM   #3
duervo
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Quote:
Originally Posted by windowstomac View Post
Hi there,

I have a major problem.

A whole bunch of keys on my MacBook Pro have gone dead - they are random and not in top left to bottom right lines like I have seen in the past when a keyboard has shorted or has water damage.

More bizarrely still the exact same keys don't work on an external USB keyboard.

I have full disk encryption on. I can't type in my password.

I've seen stuff online about this being related to "mousekeys" but I can't get into OS X. I have reset PRAM and SMC, or at least I think I have, as I can't be sure whether the option and control keys work.

I can't boot to CD as the C key doesn't work.

Please help - I have deadlines!

B
Boot the system in safe mode, then remove your third-party software that has anything to do with the keyboard or mouse. (Hopefully the keys needed to boot into safe mode still work.)

http://support.apple.com/kb/HT1455
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Old Jul 2, 2013, 09:33 AM   #4
windowstomac
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Just thought I'd update on this. After replacing the keyboard (NOT an easy job), the problem remained. None of the startup shortcut keys worked either. Eventually, after hours of frustration I managed to get in and wipe the hard drive, then reinstalled Snow Leopard and hey-presto, it was back and working!

Moral of the story: Macs can have some STRANGE software / firmware problems. I've worked in the IT industry for many years and I was utterly convinced it was a hardware issue.
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