Ahh.. Ok, lets try some steps that may work. Then we will move on to the harder stuff.
Lets start here.
Shut down your Mac.
Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on your Mac.
Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.
Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.
Release the keys.
Will it boot past the no entry sign now?
If not, lets try this next. Shut down the mac, start it and immediately press and hold the keys below.
- Hold both the Command and R keys on the keyboard until you hear the chime noise.
The Mac will now start in OS X Recovery mode. In recovery mode you should be able to choose reinstall osx.
I just seen your request for a phone call, which will cost more. Id like you to try the above steps first and see if they work, ( and save you the extra $$ for a phone call ) and if they dont then we can move to phone support.
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