Try Booting as far as you can, then press (and hold) the power switch until it shuts down, then power back up; it should boot normaly with a BIOS/Boot menu prompt.
It works(I have to stay on the power button for many seconds), in sense that the system boots from the internal hdd and Windows 8.
There is no way to start the system using a different device.
Also the 16GB emergency boot pendrive created with windows 8 itself does not start (selecting its starting from windows 8 UEFI... but doesn't work).
It seems that the only way to recover from an hdd failure is to replace the disk with another model set up by a different PC... after disassembling half notebook.