Acer Aspire S3 Ms2346 Service Guide

							CHAPTER 5
Jumper and Connector Locations 
						

							5-2
Mainboard Layout . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . 5-3
Clearing Password Check and BIOS Reco very . . . . . . . . . . . . . 5-5
Clearing the BIOS Passwords . . . . . . . . . . . .  . . . . . . . . . . . . . . 5-5
Performing a BIOS Recovery  . . . . . . .  . . . . . . . . . . . . . . . . . . . 5-6 
						

							Jumper and Connector Locations5-3
Jumper and Connector Locations
Mainboard Layout0
Figure 5-1. Mainboard Top
Table 5-1. Mainboard Top
No.CodeComponentNo.CodeComponent
1 HDMI1 HDMI out port 10 TPAD1 Touchpad connector
2 USB USB port 11 PCH1 Mobile Intel UM67 Chipset
3 CARD1 Card reader connector 12 PWR1 Power connector
4 FAN1 Fan connector 13 MISC1 WLAN connector
5 LOUT1 Mic/Headphone port 14 MINI1 Mini-board connector
6 RTC1 RTC battery connector 15 LVDS1 LCD cable connector
7 SPK1 Speaker connector 16 KB1 Keyboard connector
8 RAM1/3/5/7 Onboard memory 17 HDD1 HDD connector
9 CPU1 CPU 
						

							5-4Jumper and Connector Locations
Figure 5-2. Mainboard Bottom
Table 5-2. Mainboard Bottom
No.CodeComponent
1 G2201 Clear password hardware gap
2 RAM2/4/6/8 Onboard memory
3 DMIC1 Mic-in 
						

							Jumper and Connector Locations5-5
Clearing Password Check and BIOS Recovery0
This section provides procedures for:
Clearing the BIOS passwords
Performing a BIOS recovery
Clearing the BIOS Passwords0
To clear a lost BIOS password (user or supervisor password), you need to short the clear 
password hardware gap (G2201) located on the mainboard. 
Figure 5-3. G2201 Hardware Gap
1. Shut down the computer and disconnect the AC adapter and all other peripherals from the  computer. 
2. Perform the “ Removing the Middle Cover Assembly ” procedure described on page3-39.
3. Use an electrical conductivity tool to short  the two contacts on the hardware gap together.
4. Connect the DC-In cable to the mainboard.
5. While resting the tool on the two contacts, plug one end of the AC adapter into the DC-in  jack and plug one end to an electrical outlet.
6. Press the   button to turn on the computer. 
7. After the BIOS POST, remove the tool from the hardware gap. 
8. Perform the “ Replacing the Thermal Module ” procedure described on page 3-53.
9. Perform the “ Replacing the Battery Pack ” procedure described on page 3-73.
10. Perform the “ Replacing the Lower Case ” procedure described on page 3-76.
11. Turn on the computer and press  F2 during bootup to access the Setup Utility. If no 
password prompt appears, the BIOS password s have been cleared. If the prompt 
appears, repeat steps 4-10 until the BIOS passwords have been cleared.
12. Press  F9 to load the system defaults. 
13. Press  F10 to save the changes you made and close the Setup Utility.  
						

							5-6Jumper and Connector Locations
Performing a BIOS Recovery0
Boot Block0
An interruption during a BIOS flash procedure (e.g. a power outage) can corrupt the BIOS 
code, which will cause the system  to go into an unbootable state. The BIOS boot block refers 
to a special BIOS program that can be used to boot up a system with minimum BIOS 
initialization.You need to access and execute  the boot block to reboot the computer and 
recover the regular BIOS code. 
Creating the Crisis Disk0
NOTE:NOTE :
The BIOS crisis recovery disk should be prepared in a computer running the Windows 
XP, Vista, or 7 OS. 
1. Prepare a removable USB flash drive. Note that all data in the USB flash drive will  be cleared during the creation of the crisis 
disk.
2. Set up a computer running the Windows XP, Vi sta, or 7 operating system and plug in the 
USB flash drive into an available USB port.
3. Open the Notepad  program and create a new file. 
4. Type  startup.nsh .
For example, the USB key prompt is  fs0. The  PFlash.efi  and BIOS.cap  files are in the fs0: 
root directory .
Figure 5-4. Startup.nsh File
5. Save this file as  startup.nsh in the USB flash drive’s root directory. 
6. Decompress the Crisis Package Source in the USB flash drive’s root directory. 
7. Eject and reconnect the USB flash drive from  the computer, and make sure it contains the 
following files:
EFI folder
BIOS image file
BIOS.cap
PFlash.efi
PFlashX86efi
Startup.nsh 
						

							Jumper and Connector Locations5-7
Performing a BIOS recovery0
NOTE:NOTE:
Make sure the battery pack  is installed to the system and that the computer is 
connected to a UPS unit during the BIOS recovery process. 
The function hotkey sequence  Fn+Esc  is used to enable the BIOS recovery process when 
system is powered On during BIOS POST. If this function is enabled,  the system will force the 
BIOS to execute the boot block program.
To perform a BIOS recovery:
1. Shut down the BIOS failed-computer.
2. Connect the USB flash drive containing the Cr isis Recovery disk files to the computer.
3. Press and hold the Fn+Esc  keys, then press the power button  .
The BIOS recovery process begins. When th e process is complete the computer will 
automatically reboot.
4. Disconnect the USB flash drive from the computer.
5. Perform a BIOS flash procedure to update the BIOS firmware. Refer to the “ BIOS Flash 
Utilities ” section on page 2-12 for detailed instructions.  
						

							5-8Jumper and Connector Locations 
						

							CHAPTER 6
FRU List 
						

							6-2
Aspire S3 MS2346 Exploded Diagrams. . . . . . . . . . . . . . . . . . . . 6-4
Main Assembly  . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
FRU List . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6