NOTE: Do not remove the base cover or use any blower to clean the vents.
8. Enter the Service Mode.
Service Mode
Service Mode is used to cut off power without disconnecting the battery cable from the system board before conducting
repairs in the computer.
CAUTION: If you are unable to turn on the computer to put it into Service Mode, proceed to disconnect the
battery cable. To disconnect the battery cable, follow the steps in Removing the battery.
NOTE: Ensure that your computer is shut down and the power adapter is disconnected.
a. Press and hold the B key and the power button for 3 seconds or until the Dell logo appears on the screen.
b. Press any key to continue.
c. If the power adapter is not disconnected, a message prompting you to disconnect the power adapter appears on the
screen. Disconnect the power adapter and then press any key to enter into the Service Mode. The Service Mode process
automatically skips the following step if the Owner Tag of the computer is not set up in advance by the user.
d. When the ready-to-proceed message appears on the screen, press any key to proceed. The computer emits three short
beeps and shuts down immediately.
The computer shuts down and enters the Service Mode.
Service mode
Service Mode allows users to immediately cut off power from the computer and conduct repairs without disconnecting the
battery cable from the system board:
1. Shut down the computer and disconnect the AC adapter.
2. Press and hold the <B> key on the keyboard and then press the power button. The computer boots up.
Figure 12. Logo screen
3. When the Owner Tag information appears on the screen for models that are configured with owner tag, press any key to
proceed.
NOTE:
The Service Mode procedure will automatically skip this step if the Owner Tag of the computer is not set up in
advance by the manufacturer.
Working inside your computer 31
To Next Page
Loading...
