iMac freezing on startup/booting from usb/cd
I have an 24' iMac from 2008.
It started by freezing at startup screen, So I replaced the HDD thinking that was the fault, but the original HDD had no faults with it.
Now when I try to boot it from a USB/CD it freezes at the loading circle ( Can't enter the Resotre program)
Tried an SMC Reset and also a NVRAM reset.
Also tried with different RAM Sticks
But it still freezes.
Apple Hardware Test does not show any problems either.
Is this a good question?