Mac Startup with no logo

[Beeblebrox42]

As per my previous post i have been having issues with a 2007 MBP.

I have narrowed the problem down to a faulty hard drive, I did this by successfully installing snow leopard on an external and booting from there, however, when I start the mac, press the option key and select the external, it initially sits there on the apple logo and cog, but after a while that apple logo disappears and is replaced by a circle with a line through it, much like a no entry sign.

Any ideas?

 

[mrbash]

It does sound like a faulty HDD. You will likely have to replace the internal HDD. Fortunately, a replacement drive is very cheap, and if you have the screwdrivers, it is a very easy to do.

Go to iFixit.com for some visual tutorials.

Once you have replaced your internal HDD, you can use something like SuperDuper to clone your external drive to your internal.