Removing and replacing a FRU
vSystem board without IBM security chip (bottom view)
Begin by checking the FRU number of the system board, and be sure to use the correct system board FRU for the computer. For the FRU numbers, see “Parts list” on page 136.
Important
If the ThinkPad computer you are servicing has the security chip, mind the following:
vDo not remove the security chip from the system board. If the security chip is removed by accident, reinstall it on the system board immediately. Then make sure that it is firmly fixed on the system board and does not move easily.
vThe security chip cannot be used with any other system board.
vThe system board cannot be used with other security chip.
vThe system board cannot be used without the security chip.
vWhen you return the defective system board FRU, you must check whether the security chip is firmly attached to the system board. If it is not embedded, it may not be covered under warranty.
