Could someone help me please.. Startup problems

[SamThompson1990]

Hi.
My macbook keeps freezing when ever I try to boot it up. It's get to the apple logo with all spiny cog thing, and then it freezes. I tried to open up the help menu, but it did the same thing. Anyone got any ideas on what to do or is it a case of i'm gonna have to whip the harddrive?

Thanks

 

[GGJstudios]

This may help, if you haven't seen them already:

Mac OS X: Gray screen appears during startup
Troubleshooting: My computer won't turn on
Mac doesn't boot​

A flashing question mark appears when you start your Mac
OS X Mountain Lion: If a flashing question mark appears
Mac OS X 10.6: If a flashing question mark appears

 

[SamThompson1990]

I've tried all of those. and none of them seem to work.
safe mode freezes.

I'm also using an external hard drive as my hard drive, i dunno if that makes any difference. and it's mountain lion.

 

[DanielCoffey]

You could always ask in the MacBOOK Pro forum - this is the Mac Pro Desktop forum.