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In this Dell laptop tutorial we are going to show you how to install and replace the Modem Port Circuit Board on your Dell Inspiron 1420n laptop. These installation instructions have be made into 28 easy to follow printable steps. We have also create a video tutorial that shows you how to install your Dell Inspiron 1420n Modem Port Circuit Board.
Before you begin
Please take the time read the following safety guidelines when working on static sensitive electrical components. Dell repair manual service precautions
Tools needed for this laptop repair
1 x small phillips head screwdriver
1 x small flat head screwdriver
1 x plastic scribe (optional)
Inspiron 1420n Modem Port Circuit BoardInspiron 1420n Modem Port Circuit Board
Video tutorial repair manual
Installation and Removal Instructions Dell Inspiron 1420n Modem Port Circuit Board
Step 1
Slide the 2 battery latches towards the outside of the laptop.
Slide the battery out.
Step 2
Loosen the 2 retaining screws.
Lift the hard drive door away form the laptop.
Step 3
Using the black tape, lift the hard drive and caddy out of the laptop.
Step 4
Loosen the 3 retaining screws.
Lift the memory door away form the laptop.
Step 5
Separate the the memory clips until the memory stick lifts up.
Lift the memory stick away from the motherboard.
Repeat the process for the second memory stick.
Step 6
Remove the 2mm x 3mm screw.
Unplug the modem card from the motherboard.
Unplug the modem cable.
Step 7
Loosen the 3 retaining screws.
Remove the CPU processor door.
Step 8
Loosen theLift the heat sink away from the motherboard. 4 heat sink screws.
Step 9
Using a flat head screw driver, turn the CPU locking screw counterclockwise approximately 180 degrees.
Lift the CPU processor away from the motherboard.
Step 10
Remove the (2) 2.5mm x 8mm hinge screws on the bottom of the laptop.
Remove the (2) 2.5mm x 8mm hinge screws on the back of the laptop.
Step 11
Remove the (13) 2.5mm x 8mm bottom base screws.
Step 12
Remove the (3) 2mm x 3mm bottom base screws.
Remove the 2.5mm x 5mm bottom base screw.
Step 13
Turn the laptop over an open it up.
Using a flat head screw driver pry up the power button cover starting on the right side and work your way to the left.
Step 14
Unscrew the (2) 2mm x 3mm screws.
Carefully lift the keyboard up and position it above the power button.
Step 15
Carefully pivot up the blue latch on the keyboard cable connector and slide the cable out.
Step 16
Remove the left and right hinge covers.
Step 17
Unplug the WLAN antenna cables.
Unscrew the 2mm x 3mm screw.
Remove the WLAN card from the motherboard.
Step 18
Unplug the WWAN antenna cables.
Unscrew the 2mm x 3mm screw.
Remove the WWAN card from the motherboard.
Step 19
Remove the 2mm x 3mm screw on the media button circuit board.
Loosen the media button circuit board and remove the antenna cables from under it.
Step 20
Unplug the LCD cable.
Lift the LCD display assembly away from the laptop.
Step 21
Remove the (3) 2.5mm x 5mm top palmrest screws.
Unplug the palmrest cables.
Step 22
Remove the palmrest from the laptop base.
Step 23
Unplug the audio board cable and speakers.
Remove the 2.5mm x 5mm screw.
Step 24
Remove the (2) 2mm x 3mm screws.
Lift the motherboard out of the base and turn it over.
Step 25
Unplug the fan cable.
Remove the 2.5mm x 5mm fan screw and lift the fan from the motherboard.
Step 26
The remaining piece is the complete motherboard.
Step 27
Remove the 2.5mm x 5mm Right speaker screw.
Lift the speaker away from the base.
Step 28
Remove the 2.5mm x 5mm screw.
Lift the modem port away form the base.
Inspiron 1420n Modem Port Circuit BoardInspiron 1420n Modem Port Circuit Board
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Please take the time read the following safety guidelines when working on static sensitive electrical components.
