H136617: 9546 COMBINED SYSBRD & CPU FRU REPLACEMENT INFO. TEXT: There are two levels of system board and CPU that could be installed in the following 9546 or 9547 model 760 systems. The new level CPU operates correctly with either level system board, but the early level CPU will only operate correctly with the early level system board. SYMPTOM: If the early level CPU is installed in a newer level system board the system will not power-on the first time the power switch is pushed. At the second power-on the system will power- on correctly and operate without error. If the system is shut down, but still at normal operating temperature, it will power- on during the first try. FIX: When replacing a system board FRU, identified by the bar code in FIG 1 or by the level of module in Fig 2 and 3, a new CPU should be ordered. This is because the early level system board will most likely have an early CPU that will not match the newer level system board from FRU stock. NOTE: The CPU level can not be determined until it is removed from the system. DETAIL: ThinkPad 760 Systems affected: Model EL/ELD U4H,U4F,U6F,U6G,U3F,U4R,U4S,U6R Model E/ED U3A,U3B,U4A,U4B,U3L SYSTEM BOARD IDENTIFICATION METHOD 1. (FIG 1) When ordering a replacement system board for one of the above 760 models check the bar code of the failing board. If the bar code contains 1MH, 1MP or 1MR, the system board is at the early level and the CPU level should be checked before it is swapped from the old system board to the new level system board. If the CPU that was ordered is not used return it. (Check FIG 4 for CPU FRU numbers.) The bar code is located below the option in the ULTRA BAY. Lift the keyboard and remove the option to see the Bar code. The X in the figure represents any letter or number and is not relevant. There are two types of BAR Codes today, type 1 in Fig 1a and type 2 in Fig 1b. Both of these types of Bar Code are on the early level system boards. _______________________________________________________ |FIG 1 a | | __________________________________ | |BAR CODE | |||||||||||||||||||||||||||||| | | |EXAMPLES | |||||||||||||||||||||||||||||| | | |TYPE 1 | 1MHXXXXXXXX XXXXXXX X XXXXXX | | | |__________________________________| | | OR | | __________________________________ | | | |||||||||||||||||||||||||||||| | | | | |||||||||||||||||||||||||||||| | | | | 1MPXXXXXXXX XXXXXXX X XXXXXX | | | |__________________________________| | | OR | | __________________________________ | | | |||||||||||||||||||||||||||||| | | | | |||||||||||||||||||||||||||||| | | | | 1MRXXXXXXXX XXXXXXX X XXXXXX | | | |__________________________________| | | | |_______________________________________________________| _______________________________________________________ |FIG 1 b | |BAR CODE | |EXAMPLES | |TYPE 2 | | ______________________________________ | | | ||||||||||||||||||||||||||||||||| | | | | ||||||||||||||||||||||||||||||||| | | | | XXXXXXXXXXX1MHXXXXXXXXXXXXXXXXXX XXX | | | |______________________________________| | | OR | | ______________________________________ | | | ||||||||||||||||||||||||||||||||| | | | | ||||||||||||||||||||||||||||||||| | | | | XXXXXXXXXXX1MPXXXXXXXXXXXXXXXXXX XXX | | | |______________________________________| | | OR | | ______________________________________ | | | ||||||||||||||||||||||||||||||||| | | | | ||||||||||||||||||||||||||||||||| | | | | XXXXXXXXXXX1MRXXXXXXXXXXXXXXXXXX XXX | | | |______________________________________| | | | |_______________________________________________________| SYSTEM BOARD IDENTIFICATION METHOD 2. (FIG 2) Alternative method to identify older level system boards if the bar code is damaged: This can only be done after the system board is removed from the computer. NOTE: When the early level system board is reworked during the repair process the system board FRU part number and BAR Code are changed to the new level board numbers, but the module identifier in Fig 3 is not changed. Because of this the alternative method can only be used on the early level system board FRUs and early level Bar Coded (Fig 1a&b) system boards. _______________________________________________________________ | FIG. 2 BATTERY HARD DISK | | ___ DSKT _______ _________ ____________ | | | |________| |__| | ___| | | | | |_| | | | | | | | | Check this module | | | | BOTTOM VIEW OF SYSBRD | | | | | _____ __|__ | | | | | | | See || | | | | | |Fig 3|| | | | |_____| |_____|| | | | | | | |____________________________________________________| | | (---) (--------) (---) (----------------) | | SERIAL PARALLEL DSP EXPANSION CONNECTOR | |_____________________________________________________________| _______________________________________________________ | __________________ | | | | | | FIG 3 ------> | INTEL | | | | PCIset | | | | SB82437MX | | | | SU037 <--------|----- Identifier | | | intel c '95 | SU036 or SU037| | | | | | | | | | |__________________| | |_______________________________________________________| NOTE: If the sysbrd module identified in Fig 2 and 3 has SU036 or SU037 on it the system board is at the older level. If the CPU that was ordered is not used return it. (Check FIG 4 for CPU numbers.) ________________________________________ |FIG 4. | | | | OLD NEW | |100 MHz CPU FRU P/N46H5598 P/N11J9673 | |120 MHz CPU FRU P/N39H6230 P/N11J9672 | |120 MHz CPU FRU P/N46H5597 P/N82H8927 | |133 MHz CPU FRU P/N39H6231 P/N82H8897 | |133 MHz CPU FRU P/N46H5596 P/N11J9674 | |________________________________________|