=

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

=



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.