Physical disk loss then. Have you tried to boot with the disk physically removed? Some servers will attempt to boot the first disk they find.
What do you get on the console when you power on? There must be some POST messages somewhere as the BIOS / Firmware probes the hardware, then you should get some messages or prompts on the console.
Of course, I'm hoping that it is not a console that is off with the server and takes an age to warm up. From experience, they can be a nightmare.
Any change of a screen shot? Of course, this assumes that you have a remote/virtual console.
- POST = Power On Self Test