Status Indicators - Lenovo ThinkPad X121e User Manual

2 SIM card slot
If your computer has a wireless WAN feature, it might require a SIM (Subscriber Identification Module) card
to establish a wireless WAN (Wide Area Network) connection. Depending on the country of delivery, the SIM
card may be already installed in the SIM card slot.
3 Memory slot
You can increase the amount of memory in your computer by installing a memory module in the memory
slot. Memory modules are available as options.
4
PCI Express Mini Card slot for wireless WAN
Your computer might include a PCI Express Mini Card for wireless WAN in the PCI Express Mini Card
slot for wireless WAN communications.
5 PCI Express Mini Card slot for wireless LAN/WiMAX
Your computer might include a PCI Express Mini Card for wireless LAN/WiMAX in the PCI Express Mini
Card slot for wireless LAN/WiMAX communications.
6 Hard disk drive or solid state drive slot
Your computer may have a large-capacity, customer-upgradable hard disk drive that can meet a variety of
storage demands. To keep the drive safe, Active Protection System™ is installed on your computer. For
details, refer to "Active Protection System" on page 17.
Some models are equipped with a solid state drive to provide enhanced performance, energy savings, and
reduced weight.
Note: The hidden service partition is the reason why there is less free space than expected on your hard
disk drive or solid state drive. This reduction is more noticeable on the solid state drive because of its
smaller capacity.

Status indicators

Your computer has two system-status indicators and a power-status indicators. The status indicators
show the current status of your computer.
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User Guide