I can't get anything other than a flashing question mark at bootup?
So, my dad gave me his old business iMac as he was due for a new one, but wanted me to wipe everything, so i did a reset by unmounting the disk in disk utility and erasing. Then when i restarted I was taken to a screen with a flashing question mark inside a folder. Originally when i googled it, I found that I could hold CMD+R and it would take me to a image of a globe. On this screen i connected to my WIFI and it started doing something, but after about 30 mins, came up with error message 501 0F? Now, when i CMD+R on startup, absolutely nothing happens, and I am taken to the flashing question mark once again?
How can I resolve this? Id rather not go to an apple store as Im miles away from one and its a rather heavy unit to be lugging around London.
Is this a good question?