IBM NB1003 Hardware Maintenance Manual - Page 144
Important, remove, security, system, board, cannot
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Removing and replacing a FRU v System board without the security chip (bottom view) Begin by checking the FRU number of the system board, and be sure to use the correct system board for the computer. For the FRU numbers, see "Parts list" on page 190. Important If the ThinkPad computer you are servicing has a security chip, bear the following in mind: v Do not remove the security chip from the system board. If the security chip is removed by accident, reinstall it on the system board immediately. Make sure that it is firmly fixed on the system board and does not move easily. v The security chip cannot be used with any other system board. v The system board cannot be used with any other security chip. v The system board cannot be used without the security chip. v If you return a defective system board, you must check whether the security chip is embedded. If it is not, the board may not be covered under warranty. 138 T40/T40p, T41/T41p, T42/T42p