IBM ThinkPad T21 Hardware Maintenance Manual page 138

Removing and replacing a FRU
When installing, do the following:
v Attach the I/O card spacer ( a ) onto the new sub card
and make sure that the connector is firmly attached.
v Make sure that the eject lever is poped out b and then
install the sub card.
v Take care not to damage the switch on the sub card (A).
v Make sure that the guide of the card is firmly attached
c as shown in the figure.
132
ThinkPad T20, T21, T22, T23 (MT 2647/2648)
4
A
c
a
b