So far the Iwill KA266(ALi) and the MSI KLE(Via) chipset both cause random non boot problems when a usb mouse and/or keyboard is attached, usually hitting reset start the system. Soft resets cause system to initialize but no video display. Anyother systems/mobos displaying this problem? I use USB Kb/mouse to save IRQs on my RAID systems and SCSI systems with video capture and IRQ hungry video/sound cards. KT133/A and KM133 systems don't exihibit these problems.
You don`t say which O/S you are useing.
However, it would appear that because the problem is USB in origin, you may have to use the two Microsoft USB patches which were designed for VIA chipset & Win95B use.
Let me know if it makes any difference.
On the Edge of Extremity
Microsoft Registered OEM,DSP,MCP
Custom Building of PC`s.
I'm using WinMe on both systems, I have the Via 4in1 v 30 installed, I forgot about the usb patch. I'll give it a try and let you know