Before you begin, Preparing to work inside the computer – Dell Latitude C640 User Manual
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Before You Begin
Dell™ Latitude™ C540/C640 Service Manual
Preparing to Work Inside the Computer
Preparing to Work Inside the Computer
CAUTION:
Before working inside your computer, read the safety instructions in your System Information
Guide.
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.
NOTICE:
To avoid damaging the computer, perform the following steps before you begin working inside the computer.
1. Ensure that the work surface is clean to prevent scratching the computer cover.
2. Save any work in progress and exit all open programs.
3. Turn off the computer and all attached devices.
NOTE:
Before turning off the computer, ensure that the computer is not in a power management mode. If you
cannot shut down the computer using the computer operating system, press and hold the power button for 4
seconds.
4. If the computer is connected (docked) to a docking device, undock it. See the documentation that came with the
docking device for instructions.
5. Disconnect the computer and any attached devices from electrical outlets.
6. To avoid possible damage to the system board, wait 10 to 20 seconds and then disconnect any attached devices.
7. Disconnect all other external cables from the computer.
8. Remove any installed PC Cards or plastic blanks from the PC Card slot.
9. Close the display and turn the computer upside down on a flat work surface.
NOTICE:
To avoid damaging the system board, you must remove the main battery and secondary battery (if present)
before you service the computer.
10. Remove the primary battery from the battery bay and the secondary battery from the module bay, if a secondary
battery is in use.
11. Remove any installed device in the module bay.
12. To dissipate any static electricity while you work, use a wrist grounding strap or periodically touch an unpainted metal
surface.
13. Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by it edges
or by its metal mounting bracket. Hold a component such as a microprocessor by its edges, not by its pins.