Question Mark Folder and Keyboard isn’t working
I am trying to resurrect an old Mac Pro desktop. When I turn it on I hear the Apple ding, but after about 30 seconds the folder with the question mark appears. I know this means it’s trying to find an OS. But the hard drive inside the machine (brand new, a fresh os installed from another computer) has an os on it - so it shouldn’t be flashing. I tried a keyboard shortcut - but the keyboard isn’t working - even the num lock button won’t light up - but it works on any other computer. Pls advise! Thanks so much