I'd check ibm.com for what latest video driver was available and install it.
I have a laptop IBM ThinkPad 600 with Windows 98. Windows was damaged somehow, but I was able to restore it. However, it only restored to 16 colors and the option for 256 colors isn't even listed anymore when you go to "properties" and "settings". Because of it, my DVD player won't view anymore. Is there a file that can be downloaded to restore it? Thanks.