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    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1247                  7-6-95

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    BRAVO MS P/90 WITH AN ATI GRAPHIC EXPRESSION CARD

    PROBLEM

    The Bravo MS P/90 system, with ATI's Graphic Expression card, is unable to
    run the Windows 3.1 software.

    CAUSE

    A timing problem on the RSTDRV line causes a Graphics Expression card
    failure.

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501534-411      BRAVO MS P/90         Revision
    202720-001      PCBA RISER CARD       X03 or lower

    SOLUTION

    Replace the PCBA riser card with p/n 202720-001, revision X04 or higher.

    CAUTION

    This modification should be performed ONLY by a qualified service technician.
    It is strongly recommended that this change be completed by an AST Authorized
    Service Center.  In no case will AST Research, Inc. be liable for damage to
    the system and its components, or loss of data caused by improper
    modification.

    PREREQUISITES

    A full backup of all data on the hard drive in the computer is strongly
    suggested.

    TIME REQUIRED

    30 minutes.

    STATUS VERIFICATION

    The revision level of the AST riser card can be identified by observing the
    revision letter at the end of the nine-digit part number located on the solder
    side of the card.

    TOOLS REQUIRED

    Standard computer tools.

    INSTALLATION PROCEDURE

    Refer to the system Hardware Maintenance Manual.

    Removal and replacement of system "Field Replaceable Units" (FRUs) should
    only be performed according to the installation procedures approved and
    prescribed by AST Research, Inc.

    Remove the riser card according to procedures approved and prescribed by
    AST Research, Inc.

    CHECK-OUT PROCEDURE

    To verify proper operation of the system upon completion of this change,
    follow the setup and test procedures described in the AST User's Manual.

    NOTE

    Warranty reimbursement for this change requires prior AST Research, Inc.
    approval.

    The warranty on this system will become VOID if this change is completed
    by ANYONE other than an AST Authorized Service Center.