Macbook Pro boot up problems

Hi
I have a Macbook Pro from 2006. Recently, it boots up to the stage of the Apple logo and a grey bar appears to load twice but then shuts down. I took it to an Apple reseller who said it was a problem with the logic board. I started it up in verbose mode, and although I know very little about technical details, the start up comments that look negative are:
-Invalid sibling link
-Disk full error
-The volume Macintosh HD could not be repaired
-fsck failed
-Can't get kextd port
-Killing all processes
-CPU halted
It doesn't sound good to me. I wondered if anyone could offer any further insights?
Thanks!

P.S I just took the case i had on it off then shut down and restarted twice and it came on both times. I don't know if this means anything

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Hi, I bought a 13” macbook pro 3 yrs ago.. Its running the latest version of Lion.
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Initially the boot up sound will go off and get stuck on a white screen.
I’ve left it on for 30mins….it took me to a disk disk utility screen…
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WB

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I would think seriously about a backup strategy for the future:
Basic Backup
Get an external drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
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SuperDuper!
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Visit The XLab FAQs and read the FAQ on backup and restore. Also read How to Back Up and Restore Your Files.
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