Acer Aspire 7420 Service Guide

							Chapter 363
Removing the SD dummy card
1.Push the SD dummy card all the way in to eject it (1, 2).
2.Pull it out from the slot (2). 
Removing the PC and ExpressCard dummy cards
1.Press the eject button to pop out the button. 
						

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2.Press it again (1) to pop out the PC dummy card (2). Remove the PC dummy card from the slot.
3.Push the ExpressCard dummy card all the way in to eject it. 
4.Pull it out from the slot.
Removing the Lower Cover
1.See “Removing the Battery Pack” on page 62. 
						

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2.See “Removing the SD dummy card” on page 63.
3.See “Removing the PC and ExpressCard dummy cards” on page 63.
4.Loosen the nine screws (B) on the lower cover.   
5.Use a plastic screw driver to carefully pry open the lower cover. 
6.Remove the lower cover from the lower case. 
Removing the Secondary HDD Cover
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the SD dummy card” on page 63.
3.See “Removing the PC and ExpressCard dummy cards” on page 63.
4.See “Removing the Lower Cover” on page 64.
StepSize (Quantity)ColorTo r q u e
1~9 M2 x L4 (9) Black 1.6 kgf-cm 
						

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5.Loosen the two screws (B) from the secondary HDD cover.  
6.Use a plastic screw driver to pry open the secondary HDD cover.
7.Remove the secondary HDD cover from the lower case.
Removing the Secondary HDD Bracket and Connector
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the Secondary HDD Cover” on page 65.
StepSize (Quantity)ColorTo r q u e
1~2 M2 x L4 (2) Black 1.6 kgf-cm 
						

							Chapter 367
3.Remove the HDD Bracket from the slot.
4.Disconnect the SATA power connector. 
5.Disconnect the SATA connector.
6.Remove the aluminum tape together with the connector. 
						

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Removing the DIMM 
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the SD dummy card” on page 63.
3.See “Removing the PC and ExpressCard dummy cards” on page 63.
4.See “Removing the Lower Cover” on page 64.
5.See “Removing the Secondary HDD Cover” on page 65.
6.Push out the latches on both sides of the DIMM socket to release the DIMM. 
7.Remove the DIMM module. 
Removing the WLAN Board Modules
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the SD dummy card” on page 63.
3.See “Removing the PC and ExpressCard dummy cards” on page 63.
4.See “Removing the Lower Cover” on page 64.
5.Remove the tape holding the gray antenna.  
						

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6.Disconnect the antenna cables from the WLAN board. 
7.Move the antenna away from the WLAN board and remove the two screws (C) on the WLAN board to 
release the WLAN board.   
8.Detach the WLAN board from the WLAN socket. 
NOTE:  When attaching the antenna back to the WLAN board, make sure the cable are arranged properly. 
Removing the Hard Disk Drive Module 
1.See “Removing the Battery Pack” on page 62.
2.See “Removing the SD dummy card” on page 63.
3.See “Removing the PC and ExpressCard dummy cards” on page 63.
4.See “Removing the Lower Cover” on page 64.
StepSize (Quantity)ColorTo r q u e
1~2 M2 x L4 (2) Silver 1.6 kgf-cm 
						

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5.Disconnect the hard disk module from the connector by pulling on the mylar tab on the hard disk module.
6.Remove the hard disk module.  
NOTE: To prevent damage to device, avoid pressing down on it or placing heavy objects on top of it. 
7.Remove the four screws (G) as shown. 
8.Remove the hard disk drive from the bracket.
Removing the Optical Drive Module
1.See “Removing the Battery Pack” on page 62.
StepSize (Quantity)ColorTo r q u e
1~4 M3 x L4 (4) Silver 1.8 kgf-cm 
						

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2.Turn the base unit over, then remove the one screw (A) on the bottom side of the unit. 
3.Carefully use a plastic screw driver to eject the optical drive tray. 
4.Pull the optical drive module out from the main unit. 
StepSize (Quantity)ColorTo r q u e
1 M2.5 x L6 (1) Black 3.0 kgf-cm 
						

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5.Remove the two screws (K) securing the locker bracket and remove the locker bracket from the optical 
disk drive module.  
StepSize (Quantity)ColorTo r q u e
1~2 M2 x L3 (2) Black 1.6 kgf-cm