MacBook Pro A1150/OSX 10.6 OSX fails to boot. Stuck on Apple logo with spinning wheel. Tried safe boot and resetting PRAM. No luck. Tried to get to the Disk Utility via the install disk but fails to boot from CD. Internal optical drive is dead and am trying to boot from an external USB connected optical drive via the C key at boot up option. Removed the HDD and verified it on my desktop G5. It passed and is OK. Don't know what else to try or what the problem can be. I can only think it may be system board related. ¿? ¿?