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Inspiron 7405 2n1 Service Manual
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Notes, cautions, and warnings
Working inside your computer
Before working inside your computer
Safety instructions
Electrostatic discharge—ESD protection
ESD field service kit
Transporting sensitive components
After working inside your computer
Removing and installing components
Recommended tools
Screw list
Major components of Inspiron 7405 2n1
Base cover
Removing the base cover
Installing the base cover
Battery
Lithium-ion battery precautions
Removing the battery
Installing the battery
Coin-cell battery
Removing the coin-cell battery
Installing the coin-cell battery
Memory modules
Removing the memory modules
Installing the memory modules
Speakers
Removing the speakers
Installing the speakers
Heat sink
Removing the heat sink
Installing the heat sink
Power-adapter port
Removing the power-adapter port
Installing the power-adapter port
Touchpad
Removing the touchpad
Installing the touchpad
Solid-state drive
Removing the M.2 2230 solid-state drive
Installing the M.2 2230 solid-state drive
Removing the M.2 2280 solid-state drive
Installing the M.2 2280 solid-state drive
Fan
Removing the fan
Installing the fan
I/O board
Removing the I/O board
Installing the I/O board
Power button with fingerprint reader
Removing the power-button board
Installing the power-button board
Display assembly
Removing the display assembly
Installing the display assembly
System board
Removing the system board
Installing the system board
Palm-rest and keyboard assembly
Removing the palm-rest and keyboard assembly
Installing the palm-rest and keyboard assembly
Drivers and downloads
System setup
Entering BIOS setup program
Navigation keys
Boot Sequence
One time boot menu
System setup options
Clearing CMOS settings
Clearing BIOS (System Setup) and System passwords
Troubleshooting
SupportAssist diagnostics
System-diagnostic lights
Recovering the operating system
Flashing the BIOS
Flashing BIOS (USB key)
Backup media and recovery options
WiFi power cycle
Flea power release
Getting help and contacting Dell
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Recommended tools
The procedures in this document may require the following tools:
Phillips screwdrivers #0 and #1
Plastic scribe
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