Question Macbook Pro won't boot from USB or DVD

[yatesjw]

I had someone give me a Macbook Pro and didn't clear it out for a new owner, so I decided to do a clean install. I made a .dmg bootable dvd and usb drive. Neither of them will force boot and I can't get the OS to install on the HDD. HELP!

 

[Ijack]

How exacly did you make the bootable media?
Have you testd it on another Mac?
Does it show as bootable in System Preferences/Startup Disk?
How are you trying to boot from it?
What year is the MacBook Pro?