I am trying to install Windows Server 2008 32bit on a HP ProLiant D380 G9 Server and after legacy boot, at the language select page I don't have mouse and keyboard available. Switched between several mice and keyboards, none of them working. Since I don't have keyboard available, I cannot continue the installation. I don't use a KVM and nothing else is attached to USB ports.
I'd suggest using the ILO if possible. I'm glad you don't have a KVM in the mix.
But are you CERTAIN that the keyboard doesn't work? I'm sure I've had situations where the mouse didn't work, but I could still navigate the installer interface using the keyboard (tab, space bar and Enter).
Another thing you could try is bootstrapping your Windows installation using the Intelligent Provisioning utility (hit
F10). This may be important because you're installing an ancient 32-bit OS (why not 2008 R2?) on equipment that wasn't designed for it. Many of the requisite drivers would be missing if you didn't do an assisted installation.