70 Solve problems Non-System Disk or Disk Error message displayedIf you are booting from the diskette drive, insert a diskettewith system files into drive A.If a bootable diskette does not boot, use the Setup Utility toverify that the initial boot parameter is set to diskette drive Aand not to a hard disk.Monitor problems Monitor screen is darkCheck that the monitor power cable is connected to themonitor and a power outlet, the monitor signal cable isconnected to the system, and the brightness and contrastcontrols are adjusted.Press the space bar or move the mouse to take the system outof sleep mode. Distorted image appears on your monitor screenAdjust the monitor’s video controls. If this does not help, turnthe monitor off for several seconds, then back on. There is constant movement on the screenA magnetic field is affecting your monitor. Move any devices(fan, motor, another monitor) that generate magnetic fieldsaway from your monitor. The screen display is fuzzy or flickering; graphicscharacters or garbage appears on the screen.Check that your monitor is set up correctly and that allconnections have been made.