    AST RESEARCH, INC.          TECHNICAL BULLETIN # 0942                 6-24-94

                          ASCENTIA 900N BOOTING AND POWER SOURCE

    PROBLEM:        The Ascentia 900N systems may hang during the booting process
                    if the power source is changed before the system has completed
                    boot up.

    CAUSE:          The system has been designed to boot up from a single power
                    source only.

    SYSTEMS
    AFFECTED:           AST                                                REVISION
                    PART NUMBER          DESCRIPTION                         LEVEL

                    501299-2XX      ASCENTIA 900N 4/50 CS10                   All
                    501300-3XX      ASCENTIA 900N 4/50 CT9                    All
                    501302-2XX      ASCENTIA 900N 4/75 CS10                   All
                    501304-3XX      ASCENTIA 900N 4/75 CT10                   All

    SOLUTION:       Use a single power source (either AC or battery) during boot.