If you are using Window's HyperTerm to do your OS install (because your HP is insisting that the console device is the serial port), make sure that your HyperTerm is
not set to
vt100 when you begin. Set it to something else (like
ansi) and then wait for it to ask you what terminal type you are using. At that point, set it to
vt100, and inform the installer that is what you are using.
If you don't do this, the auto-detection string that the installer uses to see what kind of terminal you have will blow you straight through into
Recovery mode. And you can't do installations in
Recovery mode.