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CAUTION: Safety Instructions (continued)
•
Do not plug a modem or telephone cable into the network interface controller (NIC) receptacle.
•
Disconnect the modem cable before opening a product enclosure, touching or installing internal
components, or touching an uninsulated modem cable or jack.
Products With Laser Devices
•
Do not open any panels, operate controls, make adjustments, or perform procedures on a laser device other
than those specified in the product's documentation.
•
Only trained service technicians should repair laser devices.
When Working Inside Your System
Before you remove the system covers, perform the following steps in the sequence indicated.
CAUTION: Many Dell systems can be serviced only by trained service technicians because
of high voltages and energy hazards. Do not attempt to service the system yourself,
except as explained in your system documentation. Always follow installation and service
instructions closely.
NOTICE: To help avoid possible damage to the system board, wait 5 seconds after turning off
the system before removing a component from the system board or disconnecting a peripheral
device.
1
Turn off the system and any devices.
2
Ground yourself by touching an unpainted metal surface on the chassis before touching anything inside
the system.
While you work, periodically touch an unpainted metal surface on the chassis to dissipate any static
electricity that might harm internal components.
3
Disconnect your system and devices from their power sources. To reduce the potential of personal injury or
shock, disconnect any telecommunication lines from the system.
In addition, take note of these safety guidelines when appropriate:
•
When you disconnect a cable, pull on its connector or on its strain-relief loop, not on the cable itself. Some
cables have a connector with locking tabs; if you are disconnecting this type of cable, press in on the locking
tabs before disconnecting the cable. As you pull connectors apart, keep them evenly aligned to avoid
bending any connector pins. Also, before you connect a cable, make sure that both connectors are correctly
oriented and aligned.
•
Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card
by its edges or by its metal mounting bracket. Hold a component such as a microprocessor chip by its
edges, not by its pins.
Protecting Against Electrostatic Discharge
Static electricity can harm delicate components inside your system. To prevent static damage, discharge static
electricity from your body before you touch any of the electronic components, such as the microprocessor. You
can do so by periodically touching an unpainted metal surface on the chassis.
Unmanaged Sw itches Sy stem Infor m ation Guide
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