    AST RESEARCH, INC.         TECHNICAL BULLETIN #0763                  07-16-92

                             AST MONOCHROME VGA MONITORS

    PROBLEM:       When using the AST Monochrome VGA monitor near fluorescent
                   lighting, the display may flicker slightly, especially when
                   turning on fluorescent lights.

    CAUSE:         The flicker is caused by the frequency difference between the
                   fluorescent light (60Hz) and the scanning frequency of the
                   monitor (50Hz).

    AFFECTED
    SYSTEMS:       AST Monochrome VGA monitors.

    SOLUTION:      It is recommended that any fluorescent lighting, such as that
                   found in modular workstations, be located at least 20" or more
                   from the rear of the monitor to prevent flickering.