    AST RESEARCH, INC.         TECHNICAL BULLETIN #1322              9-22-95

                         BRAVO MS AND MS-T SYSTEMS NOT BOOTING

    PROBLEM:     The system may not boot or may hang.

    CAUSE:       The issue has been traced to a particular TAG RAM
                 manufacturer. The TAG RAM chip manufactured by Paragon, was
                 found to have improper plating in the vias resulting in no
                 continuity between the PCB and the chip.

    SOLUTION:    If the error condition is experienced, the Authorized
                 Service Center technician should check location U-36 on the
                 motherboard. The offending part can be identified by the
                 chip being mounted on a PCB (printed circuit board). If the
                 part is identified, the cache including the TAG RAM
                 component should be removed to restore normal operation.
                 This part is only available in the 256K cache upgrade kit
                 for the Bravo MS and MS-T ( 501284-004) and should be
                 replaced with non-Paragon parts. Non-Paragon parts can be
                 identified by the chip not being mounted on a PCB. A
                 motherboard replacement is not required.

    SYSTEMS
    AFFECTED:    All Bravo MS and MS-T systems.