yes.

your hard drive has either been locked or is dying.

symptoms of this include applications struggling to load, strange sounds which 
you haven't heard before. irratic booting, etc. this is a dead hard disk.

please could you drop me an email off list with details of your machine, if you 
have apple care cover, etc and I can walk you through various test steps, etc 
to identify a dead drive.

from what you have described, your drive has failed. 

Hard drives have a shelf life, because of their rotational speed, heat, data 
read and write processes, drives fail. When they do, you know about it.

I've been there only yesterday with an SCSI drive which failed, had to 
disassemble it, clean, respin and reassemble it to bring it back to life to 
back up the contents to install on a nwer drive.

lew

On 4 Dec 2011, at 21:30, Roger Woolgrove wrote:

> Hi all,
> 
> After installing some software and returning to desktop, MacbookHD is dimmed 
> and I seem unable to access it.  In some instances a reboot resolves this and 
> in others it doesn't unless I leave it for somewhere between 24 and 48 hours.
> Does anyone know why the prolonged wait and better still, how do I prevent it 
> happening.
> 
> Thanks
> 
> Roger
> 
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Mr. L. Alexander.
Free Macs For The Blind.
E-Mail: freemacsfortheb...@mac-access.net
Direct line: 07936 877500

Free Macs For The blind is a charity project supplying older but working apple 
macs for blind and visually impaired people throughout the UK FOR FREE!

Do you have an old unwanted mac, any hardware, software, old PC's, etc or a 
copy of outspoken 9.2 you would be willing to donate? please get in touch.

Mac Access Dot Net; The British Mac Accessibility Network, we're here to help 
anybody disabled with anything Apple!
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