Lenovo ThinkPad L421 Hardware Maintenance Manual - Page 118
Rear view, Bottom view, In some models
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Rear view 7 6 1 2 3 4 5 1 Combo audio jack 2 DisplayPort connector 3 eSATA/USB combo connector 4 RJ-45 (Ethernet) connector 5 External monitor connector 6 Security keyhole1 7 Always On USB connector 1: In some models, the security keyhole is located on the right side of the computer. Bottom view 1 2 3 67 6 4 5 1 Battery pack 2 Battery pack latch 3 Docking connector (for some models) 4 Thermal slot cover1 5 ExpressCard slot 6 Wireless WAN card slot 7 SIM slot 1: The DIMM, hard disk drive, and thermal module are located underneath the thermal slot cover. 112 Hardware Maintenance Manual
Rear view
2
3
4
1
6
7
5
1
Combo audio jack
5
External monitor connector
2
DisplayPort connector
6
Security keyhole
1
3
eSATA/USB combo connector
7
Always On USB connector
4
RJ-45 (Ethernet) connector
1
: In some models, the security keyhole is located on the right side of the computer.
Bottom view
1
2
4
5
6
6
7
3
1
Battery pack
5
ExpressCard slot
2
Battery pack latch
6
Wireless WAN card slot
3
Docking connector (for some models)
7
SIM slot
4
Thermal slot cover
1
1
: The DIMM, hard disk drive, and thermal module are located underneath the thermal slot cover.
112
Hardware Maintenance Manual