@gaping46and2:
It passes the memory test and gets to the Booting OS… dialog on the front LCD, then a few seconds later the 4,5,6,7 LEDs flash in sequence followed by 0,1,2,3. After that, it doesn't seem to do anything else. I can see the Storage LED on the front lights up during the boot process, but after the link LEDs blink in sequence, nothing happens. Any ideas?
Do you have a pcie graphics card ?? If so i would recommend hocking it up and have a proper look at at the bootup and see on what and where it hangs/crashes