That's typical if one loads their own OS. If you don't use the IBM restore CDs you learn about drivers. Motherboard, video, USB, audio, and what else?
I just got an ibm t21 from a friend, the only problem is when i turned it on the screen size is about half as big as its supposed to be. I dont if there is some setting or a button to press to fix it but i absolutely cannot figure it out. if anyone can help that would be great.