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    AST RESEARCH, INC.         TECHNICAL BULLETIN # 1134                4-11-95

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    				 MANHATTAN P OR V REPORTING "NVRAM BAD"

    PROBLEM

    After a cold boot of a correctly configured Manhattan P or V system, the
    following error message may be reported during POST:

    	EISA Configuration NVRAM Bad - Run Configuration Utility

    This symptom may be correctly reported when some changes are made to the
    system.  For example, the CMOS battery backup is defective or the `Clear EISA
    CMOS' switch on the system board has been set.

    CAUSE

    The Power Supply Unit (AST part number: 230717-001) corrupts the EISA CMOS.

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501500-XXX     MANHATTAN V5090
    501502-XXX     MANHATTAN P5090

    SOLUTION

    Check the revision of the power supply unit.  If the power supply unit is at
    revision A, replace the power supply unit with revision B or higher.
    Run EISACU to reconfigure the EISA CMOS.

    The revision letter can be located on the power supply unit inside the system.
    For information on obtaining a replacement power supply unit, call your
    nearest AST Authorized Service Center.

    For procedures on opening the system and replacing the power supply unit,
    please refer to the AST Manhattan P and V Series Computer User's Manual.

    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.

    INSTALLATION PROCEDURE

    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.

    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.