> My HP server DS15 does not boot anymore

> "anymore"?  What has changed?

> [...] my DS15 [...]

   Not a very detailed description of anything.  Was it previously used
as a workstation, with a keyboard+mouse and graphics card+display?

> [...] using a serial connection, [...]

   Not a very detailed description of anything.  How many serial ports
are there?  How many have you tried?

      >>>show console

Does it say "graphics" or "serial" (or nothing)?

> [...] the "^X" character appears [...]

   A DS15 is newer and nicer than my XP1000, so I know nothing, but this
suggests to me that the system thinks that something is the console, and
you are trying to use something else.  Ctrl/C and/or Ctrl/X may have
some effect.

> As the "dka100.1.0.8.0" is part of the boot definition, I have tried
> to pass around it while booting (boot dka0.0.0.8.0) but this did not
> solve the issue.

   You say that as if you think that any of your readers has any idea
what disks are in this system.  I, for one, have none.

      >>>show device