HP Compaq DC7900 SFF - no support BIOS for USB keyboard/mouse

I recently bought a lease out vintage 2009 DC7900-Windows 7 Home Premium running. It has connectors from the motherboard and BIOS support for a PS2 Keyboard and mouse. There also card mother support for USB but apparently BIOS does not support a USB keyboard and a mouse. Y at - it a BIOS update that adds support for USB keyboard and a mouse?

Thank you

Well, I found what seems to be the problem. My USB keyboard and mouse are connected to a KVM switch that in turn connects to the HP PC. The KVM cable provides keyboard and mouse via a simple USB connection. I have connected a second USB keyboard directly to another USB port, and as you say, the BIOS it supported. I then connected the USB keyboard and mouse for a simple USB hub and then to the HP PC, and BIOS does not recognize the keyboard once more. It would seem that the problem is that the BIOS of the PC HP does not support keyboard behind a USB hub connectivity. I have no detailed knowledge of USB connectivity but could guess that there must be a difference Protocol when I hub is in the Middle – obviously the PC must focus on a specific device behind the hub.

In the end, I think I'm stuck just keep a separate keyboard (PS/2 or USB) around for those times when I need to communicate to the BIOS.

I have another PC of the same vintage - a custom platform - and it handles the keyboard behind the hub very well. I wonder if all new PC BIOS handle this.

Thanks again for your responses - very useful.

Tags: HP Desktops

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