HP 9153 A Service Manual page 117

PRODUCT HISTORY
Service Notes for the HP 9153B
Service Note Description S/N Prefix Affected Part
Number
9153B-1 Winchester format information 45816-69111
9153B-4 Power-on Selftest failure New 2647A 02233 and 09153-69530
firmware lower
Service Notes for the HP 9154B
Service Note Description S/N Prefix Affected Part
Number
9154B-1 Winchester format information
11-4