Recue disk on MP3 player

My PC won't boot up, and it's not a power problem. Everything I've been told to try (hold down power button for 30-60 seconds then plug power back in and boot) isn't working, so I thought a rescue disk might at least get the screen to turn on and boot it to safe mode. I have a Windows 7 Precario Compaq CQ57, and I've exhausted all options.

I did all that, in so many different ways, and nothing happens.m All I get is the power button flashing ever few seconds (about 5 or 6 seconds) and every time I press the button, nothing happens. Something will however happen if I hold down the F5 key. By doing so, the DVD tray makes its little techno gear sound, and the fan blows, and the power light stays on, but not only does the screen not turn on, but if I let go of the F5 key, or press any other button, everything shuts down.

The last time I had this problem, the screen just wouldn't turn on, and one time it randomly decided to open up the BIOS recovery menu. I can't even get there because if I hold down F5 and press F1 or F8, it all shuts down.