Acer Aspire 5940g Service Guide

							Chapter 3101
Main Module Reassembly Procedure
Replacing the CPU
IMPORTANT: The CPU has a Pin1 locator that must be positi oned corresponding to the marker on the CPU 
socket.
1. Carefully turn the mainboard upside down (CPU side  up), and place the CPU into the CPU socket as shown, 
taking note of the Pin1 locator.
2. Turn the securing screw 180° to secure the CPU in the socket.
Socket Pin1 
LocatorCPU Pin1 
Locator 
						

							102Chapter 3
Replacing the Thermal Module
IMPORTANT: Apply a suitable thermal grease and ensure all heat  pads are in place before replacing the Thermal 
Module.
The following thermal grease types are approved for use:
•Silmore GP50
•Honeywell PCM45F-SP
•ShinEtsu 7762
The following thermal pads are approved for use:
• Eapus XR-PE
1. Remove all traces of thermal grease from the CPU  using a lint-free cloth or cotton swab and Isopropyl 
Alcohol, Acetone, or other  approved cleaning agent. 
2. Apply a small amount of thermal grea se to the centre of the CPU—there is no need to spread the grease 
manually, the force used during the installation of the Thermal Module is sufficient.
3. Align the screw holes on the Thermal Module and 
Mainboard then replace  the module. Keep the 
module as level as possible to spread the thermal 
grease evenly. 4.
Replace the single Fan screw and the four Thermal 
Module screws (in numerical order from screw 1 to 
screw 4) to secure the Thermal Module in place.
5. Connect the fan cable to the Mainboard.
1
2 3
4 
						

							Chapter 3103
Replacing the VGA/MXM Card
NOTE: The following procedure outlines the installation steps for models supporting VGA Cards. The 
procedure for MXM Cards requires  two screws, though the remaining steps are identical.
1. Insert the card in to the Mainboard connector as 
shown. 2.
Replace the single screw se curing the card to the 
Mainboard.
NOTE:  MXM cards are secured with and additional  screw as indicated by the green callout. 
						

							104Chapter 3
Replacing the Mainboard
1.Insert the Mainboard in to the Lower Cover, left side fi rst. Ensure that the I/O ports on the left side of the 
Mainboard are located correctly through the Lower Case.
2. Pivot the Mainboard in to the Lower Cover as 
shown. 3.
Replace the single screw securing the Mainboard 
to the Lower Cover. 
						

							Chapter 3105
Replacing the Hinge Wells
Replacing the Card Reader Board
1.Replace the left and right Hinge Wells in the Lower  Cover as shown. Ensure that the Wells are seated 
correctly on the locating pins.
2. Replace the two screws to secure the Hinge Wells in the Lower Cover.
1. Insert the Card Reader Board right side first as 
shown. Ensure that the I/O ports on the right side of 
the board are located correctly through the Lower 
Case.  2.
Lower the board in to place and press down as 
indicated to connect the board to board interface. 
						

							106Chapter 3
Replacing the Bluetooth Module
3.Replace the four screws to secure the Card Reader Board to the Lower Cover.
1. Connect the Bluetooth cable to the module as 
shown. 2.
Place the module in the Lower Cover. Ensure that 
the module is seated correctly on the locating pins.
3. Run the cable along the cable channel as shown, and connect it to the Mainboard. 
						

							Chapter 3107
Replacing the Subwoofer
Replacing the USB Board
1.Place the module in the Lower Cover. Ensure that 
the module is seated correctly on the locating pins. 2.
Run the cable along the cable channel using all 
available clips.
3. Connect the Subwoofer cable  to the Mainboard as shown.
1. Place the board in the Lower Cover. Ensure that 
the board is seated correctly on the locating pins. 2.
Replace the single screw securing the board to the 
Lower Cover. 
						

							108Chapter 3
Replacing the Saddles
1.Align the screw holes and locating pins on the Saddles and the Lower Cover and replace the Saddles.
2. Replace the two screws to secure the Right Saddle to the Lower Cover.
NOTE:  The Left Saddle is not secured with screws. 
						

							Chapter 3109
Replacing the LCD Module
IMPORTANT: The LCD Module cannot be disassembled outside of  factory conditions. If any part of the LCD 
Module is faulty, such as the camera, antenna or LCD panel, the whole module must be replaced.
1. Align the LCD hinges with the Lower Cover screw holes and replace the LCD Module.
IMPORTANT:  Ensure that the cables pass through the Hinge Wells as shown to avoid trapping when the Upper 
Cover is replaced.
2. Replace the four screws to secure the LCD Module to the Lower Cover. 
						

							11 0Chapter 3
Replacing the TouchPad Bracket
IMPORTANT: The TouchPad cannot removed from the Upper Cover. Replace the entire Upper Cover if the 
TouchPad malfunctions.
1. Insert the TouchPad Bracket into the upper cover so the  tabs slide into the securing slots in the upper cover.
3.
Run the Conductive cable along the cable channel 
using all the cable clips. 4.
Run the LVDS cable along the cable channel using 
all the cable clips.
5. Connect the LVDS cable to the Mainboard as 
shown. 6.
Connect the Conductive cable to the Mainboard as 
shown.