Acer Aspire 5942 Service Guide

Chapter 389
Removing the Card Reader Board
1.See “Removing the Saddles” on page 83.
2.Remove the four screws securing the Card Reader Board to the Lower Cover.
3.Lift the left side of the board to disconnect the reader interface from the Mainboard.
4.Remove the Card Reader Board from the Lower Cover.
StepSizeQuantityScrew Type
Card Reader 
BoardM2.5*3 4 

90Chapter 3
Removing the Hinge Wells
1.See “Removing the Subwoofer” on page 86.
2.Remove the two screws (one each side) securing the Hinge Wells to the Lower Cover.
3.Lift the Hinge Wells clear of the Lower Cover.
StepSizeQuantityScrew Type
Hinge Wells M2.5*3 2 

Chapter 391
Removing the Mainboard
1.See “Removing the Hinge Wells” on page 90.
2.Remove the single screw securing the Mainboard to the Lower Cover.
3.Pivot the Mainboard upward and remove it from the chassis, right side first. Place the Mainboard on a clean, 
dust-free surface.
StepSizeQuantityScrew Type
Mainboard M2.5*3 1 

92Chapter 3
Removing the RTC Battery
IMPORTANT: Follow local regulations for disposal of all batteries.
1.See “Removing the Mainboard” on page 91.
2.The RTC Battery is soldered to the Mainboard. To replace the battery, solder the new battery to the 
connections shown. 

Chapter 393
Removing the VGA/MXM Card
NOTE: The following procedure outlines the removal steps for models supporting VGA Cards. The procedure 
for MXM Cards requires the removal of two screws, though the remaining steps are identical.
1.See “Removing the Mainboard” on page 91.
2.Remove the single screw securing the VGA Card to the Mainboard.
NOTE: MXM cards are secured with and additional screw as indicated by the green callout.
3.Remove the VGA Card from the Mainboard connector.
StepSizeQuantityScrew...

94Chapter 3
Removing the Thermal Module
1.See “Removing the Mainboard” on page 91.
2.Disconnect the fan cable from the Mainboard.
3.Remove the single screw securing the Fan to the Mainboard (green callout).
4.Remove the four securing screws (in reverse numerical order from screw 4 to screw 1) from the Thermal 
Module (red callout).
StepSizeQuantityScrew Type
Thermal Module CPU_SCREW_SPRIN 5
1
23 4 

Chapter 395
5.Using both hands, lift the Thermal Module clear of the Mainboard. 

96Chapter 3
Removing the CPU 
1.See “Removing the Thermal Module” on page 94.
2.Turn the securing screw 180° to release the CPU from the socket.
3.Remove the CPU from the socket as shown.
IMPORTANT: The pins on the underside of the CPU are very delicate. If they are damaged, the CPU may 
malfunction. Place the CPU on a clean, dry surface when it is not installed. 

Chapter 397
Main Module Reassembly Procedure
Replacing the CPU
IMPORTANT: The CPU has a Pin1 locator that must be positioned 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 

98Chapter 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...