Dell I15N-2727BK Owner's Manual page 11

CAUTION:
Only a certified service technician should perform repairs on your
computer. Damage due to servicing that is not authorized by Dell is not covered by
your warranty.
CAUTION:
When you disconnect a cable, pull on its connector or on its pull-tab,
not on the cable itself. Some cables have connectors with locking tabs; if you are
disconnecting this type of cable, press in on the locking tabs before you
disconnect the cable. As you pull connectors apart, keep them evenly aligned to
avoid bending any connector pins. Also, before you connect a cable, ensure that
both connectors are correctly oriented and aligned.
CAUTION:
To avoid damaging the computer, perform the following steps before
you begin working inside the computer.
1 Ensure that the work surface is flat and clean to prevent the computer
cover from being scratched.
2 Turn off your computer. See "Turning Off Your Computer" on page 10 and
all attached devices.
CAUTION:
To disconnect a network cable, first unplug the cable from your
computer and then unplug the cable from the network device.
3 Disconnect all telephone or network cables from the computer.
4 Press and eject any installed cards from the 3-in-1 media card reader.
5 Disconnect your computer and all attached devices from their electrical
outlets.
6 Disconnect all attached devices from your computer.
CAUTION:
To help prevent damage to the system board, remove the main battery,
see "Removing the Battery" on page 13, before working inside the computer.
7 Remove the battery. See "Removing the Battery" on page 13.
8 Turn the computer top-side up, open the display, and press the power
button to ground the system board.
Before You Begin
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