    AST RESEARCH, INC.         TECHNICAL BULLETIN #0842A              09-30-93

                         BRAVO LC WITH CMOS BATTERY FAILURE

    PROBLEM:       After one week of operation the CMOS battery fails and the
                   system setup is lost.

    CAUSE:         The failure is caused by a Motorola chip, part number
                   MCCS146818B at location U41.  Only revision B of the chip will
                   experience this problem.  Motorola chip MCCS146818A is not
                   affected.

    AFFECTED
    SYSTEMS:       All models of Bravo LC and Advantage with motherboard part
                   number 202492-XXX or 202480-XXX with Motorola chip
                   MCCS146818B.

    SOLUTION:      Replace the system board with similar part number, which can
                   be located between the slots.  All stock at AST has been
                   reworked and the affected component is no longer used.  The
                   motherboard can be sent to AST for repair or the system can be
                   sent in to the AST Repair Center for the board to be replaced.