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CAUTION:
To disconnect a network cable, first unplug the cable from your computer and then unplug the
cable from the network device.
5. Disconnect all network cables from the computer.
6. Disconnect your computer and all attached devices from their electrical outlets.
7. Close the display and turn the computer upside-down on a flat work surface.
NOTE:
To avoid damaging the system board, you must remove the main battery before you service the computer.
8. Remove the main battery.
9. Turn the computer top-side up.
10. Open the display.
11. Press the power button to ground the system board.
CAUTION:
To guard against electrical shock, always unplug your computer from the electrical outlet before
opening the display.
CAUTION:
Before touching anything inside your computer, ground yourself by touching an unpainted metal
surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted
metal surface to dissipate static electricity, which could harm internal components.
12. Remove any installed ExpressCards or Smart Cards from the appropriate slots.
Turning off your computer
Turning off your computer — Windows 10
CAUTION:
To avoid losing data, save and close all open files and exit all open programs before you turn off your
computer.
1. Click or tap
.
2. Click or tap
and then click or tap Shut down.
NOTE:
Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not
automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds
to turn them off.
Turning off your computer — Windows 7
CAUTION:
To avoid losing data, save and close all open files and exit all open programs before you turn off your
computer.
1. Click Start.
2. Click Shut Down.
NOTE:
Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not
automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds
to turn them off.
After working inside your computer
After you complete any replacement procedure, ensure that you connect external devices, cards, and cables before turning on
your computer.
Working on your computer
7
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