Hi,
I'm having the same problem. I have followed the steps in "Clearing the CMOS Settings" many times but it still does not work for me.
If I wait for something to appear in the monitor, the blue screen with the HP logo, like you have had, appears with "Press the ESC key for Startup Menu". However, when I press something, nothing happens.
When I keep pressing a button before this screen appears (F10 - Setup, ESC - Startup, etc.) it will direct me to the same screen you saw before, the black screen with some stats and "Press the ESC key for Startup Menu" and whatever button I pressed in the corner.
is there anything I can do?? I've tried moving the jumper to the same position as you and then changing it back, but it didn't work.