1. I/O card.
Many are hard on end-users to configure to enable the serial port or such.
2. The serial port cables.
Are not interchangable. A new system builder had upgraded their motherboard and the serial ports were dead. They had sent back the board twice and then I asked if they used the cables that came with the board. It was working in a few minutes...
A friend gave me a box full of parts including a couple of Pentium motherboards. Installed Windows 98 SE. on both. Everything works wonderfully on both.... except for the mouse. I downloaded the manuals for both boards and have read them over and over, changed jumpers, tried a diferent I/O card etc. The mouse doesn't show on the device manager and when I try to re-install the mouse drivers it still tells me that no mouse is present. I know the mice I'm trying to attach both work. Any other ideas?!