Handleiding
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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.
Safety precautions
This section details the primary steps to be followed before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break-fix procedures involving disassembly or
reassembly:
ā Turn off the computer and all attached peripherals.
ā Disconnect the computer from AC power.
ā Disconnect all network cables and peripherals from the computer.
ā Use an ESD field service kit when working inside any to avoid electrostatic discharge (ESD) damage.
ā Place the removed component on an anti-static mat after removing it from the computer.
ā Wear shoes with nonconductive rubber soles to reduce the chance of getting electrocuted.
ā Unplugging, pressing, and holding the power button for 15 seconds should discharge residual power in the system board.
Standby power
Dell products with standby power must be unplugged before you open the back cover. Systems that are equipped with standby
power are powered while turned off. The internal power enables the computer to be remotely turned on (Wake-on-LAN) and
suspended into a sleep mode and has other advanced power management features.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done by using
a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare metal
and never to a painted or nonmetal surface. Ensure that the wrist strap is secure and in full contact with your skin. Remove all
jewelry, watches, bracelets, or rings before grounding yourself and the equipment.
Electrostatic dischargeāESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards,
processors, memory modules, and system boards. A slight charge can damage circuits in ways that may not be obvious, such
as intermittent problems or a shortened product life span. As the industry pushes for lower power requirements and increased
density, ESD protection is an increasing concern.
Two recognized types of ESD damage are catastrophic and intermittent failures.
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Working inside your computer
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Productinformatie
| Merk | Dell |
| Model | 14 Plus DB14250 |
| Categorie | Laptop |
| Taal | Nederlands |
| Grootte | 38915 MB |
