Console screen looks strange

When booting, if the console screen blanks, the cursor is gone, or the display is garbled, you may have an incompatible video card. If the card does not work, check the card hardware documentation. See if there are ways to configure the switch settings so the card is in an IBM-compatible emulation mode, and that it is addressing the kind of monitor attached. In particular, disable AUTOSWITCH modes. If changing the switch settings fails, then your video card is incompatible and must be replaced with a compatible card.