Acer Aspire 5942 Service Guide

							Chapter 5159
LS-5515P Touch Pad Button Board
ItemDescriptionItemDescription
1 JP3 Finger Print Conn 3 JP2 TP Module Conn.
2 JP1 To M/B Connector 4 SW1/2 Left & Right Buttons
Bottom View
Top View
12 3
4 
						

							160Chapter 5
LS-5516P Power Saving Board
                 
ItemDescriptionItemDescription
1 SW1 Power Saving Button 2 JP1 To Media Board Conn.
        Top View               Bottom View
12 
						

							Chapter 5161
LS-5517P Volume Board
ItemDescriptionItemDescription
1 SW1 Volume Button 2 JP1 To Media Board Conn.
Top View                             Bottom View
1
2 
						

							162Chapter 5
LS-5518P Color Engine Board
   
ItemDescriptionItemDescription
1 SENSE1 Acer Logo Backlight 3 JP1 To TV-Tuner Board Conn.
2 SENSE2 Color Engine
12 3 
						

							Chapter 5163
Clearing Password Check and BIOS Recovery
This section provides you with the standard operating procedures for clearing passwords and BIOS recovery 
for the Aspire 5942 Series. The Aspire 5942 Series provides one Hardware Open Gap on the main board for 
clearing password check, and one Hotkey for enabling BIOS Recovery.
Clearing Password Check
Hardware Open Gap Description
The J4 and J5 Clear CMOS Jumpers are located inside the DIMM Module
Steps for Clearing BIOS Password Check
If users set BIOS Password (Supervisor Password and/or User Password) for a security reason, BIOS will ask 
the password during systems POST or when systems enter to BIOS Setup menu. However, once it is 
necessary to bypass the password check, users need to short the HW Gap to clear the password by the 
following steps:
• Power Off the system, and remove HDD, AC and Battery from the machine.
• Open the back cover of the machine, and find out the HW Gap on M/B as picture.
• Use an electric conductivity tool to short the two points of the HW Gap.
• Plug in AC, keep the short condition on the HW Gap, and press Power Button to power on the 
 ITEMDESCRIPTION
J4 Clear CMOS Jumper
J5 Clear CMOS Jumper
J4
J5 
						

							164Chapter 5
system till BIOS POST finish. Then remove the tool from the HW Gap.
• Restart system. Press F2 key to enter BIOS Setup menu.
• If there is no Password request, BIOS Password is cleared. Otherwise, please follow the steps and 
try again.
NOTE: The steps are only for clearing BIOS Password (Supervisor Password and User Password). 
						

							Chapter 5165
BIOS Recovery by Crisis Disk
BIOS Recovery Boot Block:
BIOS Recovery Boot Block is a special block of BIOS. It is used to boot up the system with minimum BIOS 
initialization. Users can enable this feature to restore the BIOS firmware to a successful one once the previous 
BIOS flashing process failed.
BIOS Recovery Hotkey:
The system provides a function hotkey: Fn+Esc, for enable BIOS Recovery process when system is powered 
on during BIOS POST. To use this function, it is strongly recommended to have the AC adapter and Battery 
present. If this function is enabled, the system will force the BIOS to enter a special BIOS block, called Boot 
Block.
Steps for BIOS Recovery by Crisis Disk:
Before doing this, a Crisis Diskette should be prepared ready in hand. The Crisis Diskette could be made by 
executing the Crisis Disk program in another system with Windows 7 OS.
Follow the steps below:
1.Plug in the USB disk.
2.Launch the wincris.exe program to create a USB Crisis Disk. Click Start to initiate the process.
3.Select the Quick Format option to format the disk and click Start. Follow the instructions on the screen to 
create the disk. 
4.Copy the KAYF0X64.fd BIOS file into USB flash disk root directory.
NOTE: Do not place any other *.fd file in the USB flash disk root directory.
To use the Crisis USB key, do the following:
1.Plug USB storage into USB port.
2.Press Fn + ESC button then plug in AC power.
The Power button flashes orange once.
3.Press Power button to initiate system CRISIS mode.
When CRISIS is complete, the system auto restarts with a workable BIOS. 
4.Update the latest version BIOS for this machine by regular BIOS flashing process. 
						

							166Chapter 5 
						

							Chapter 6167
FRU (Field Replaceable Unit) List
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of Aspire 5942 Series. Refer to this 
chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization).
Please note that WHEN ORDERING FRU PARTS, you should check the most up-to-date information available on your 
regional web or channel. For whatever reasons a part number change is made, it will not be noted on the printed Service 
Guide. For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code from 
those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer 
office to order FRU parts for repair and service of customer machines.
NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to 
dispose it properly, or follow the rules set by your regional Acer office on how to return it.
Chapter 6 
						

							168Chapter 6
Aspire 5942 Series Exploded Diagrams
Main Assembly
No.DescriptionAcer P/N
1 Keyboard KB.I140A.001
2 Upper Cover TBD
3 Mainboard MB.PH802.001
4 Thermal Module 60.PH702.008
5 Subwoofer 23.PH702.003
6 Lower Cover TBD
7 Hinge Saddle-L 33.PH702.002
1
2
43
5
6 7