Dell
™
Latitude™ E6420 XFR Service Manual
Page 8
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then
unplug it from the network device.
4. Disconnect any telephone, network, and USB cables from the computer.
NOTICE: To help prevent damage to the system board, you must remove the battery from the
battery bay before you service the computer.
NOTE: See the battery removal instructions adhered to the edge of the battery.
5. Open the rear battery door by sliding the latch to the right and then downward.
6. Turn the computer upside down.
7. Slide the battery release latches toward each other to place them in the unlocked position.
8. Open door fully and pull the battery tab to slide the battery out of the battery bay.
9. Disconnect any external devices and remove any installed cards before working on your computer:
• To remove any installed cards, such as an ExpressCard Card, see the Dell™ Technology Guide on your
computer or at support.dell.com.
• To undock from a docking station, see the E-Port User’s Guide or the E-Port Plus User’s Guide on
support.dell.com.
• To remove the docking adapter, see the documentation that shipped with your E-Port Adapter or see
the E-Port Adapter Quick Setup Guide on support.dell.com.
• To remove a battery slice, see the documentation that shipped with your battery slice or on
support.dell.com.
10. Turn the computer topside up, open the display, and press the power button to ground the system board.
1.3 After Working On Your Computer
After you have completed the replacement procedures, ensure you connect the external devices, cards, cables, etc.
before turning on your computer.
NOTE: To avoid damage to the computer, use only the battery designed for this particular Dell
computer. Do not use batteries designed for other Dell computers.
1. Connect any external devices, such as a port replicator, or battery slice, and replace any cards, such as an
ExpressCard.
2. Connect any telephone or network cables to your computer.
3. Replace the battery. Slide the battery into the battery bay until it clicks into place and close the battery door.
4. Connect your computer and all attached devices to their electrical outlets.
5. Turn on your computer.
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