If this happens, check your BIOS setup device boot order. It is possible that some device has been listed before your real boot device.
In my case, my boot SSD drives had been moved below ALL PCI SCSI and there are other drives in the machine which are not bootable causing this problem for me.
https://media01.nerdia.net/uploads/nerdia-logo-340x156.png00Stefan Helanderhttps://media01.nerdia.net/uploads/nerdia-logo-340x156.pngStefan Helander2012-07-15 09:01:582012-08-14 08:43:17Ubuntu boot hangs with black screen and blinking cursor