Hackintosh Slav has a large page of errors and troubleshooting steps for Hackintoshes in general:

Scrambled Login Screen

Scrambled Screen

Enable CSM in your UEFI settings. This may appear as "Boot Legacy Roms" or some other legacy setting.

Trackpad does not work but keyboard, buttons, and trackstick do!

Make sure that within your Config.plist under Kernal/Add, that VoodooInput is above/before any of the VoodooPS2 and VoodooI2C kexts. Voodooinput needs to be loaded before the VoodooPS2Trackpad kext specifically for it to attach and function.