User's Manual
Table Of Contents
- System Specifications
- System Utilities
- Machine Disassembly and Replacement
- Disassembly Requirements
- General Information
- External Module Disassembly Process
- Main Unit Disassembly Process
- Main Unit Disassembly Flowchart
- Removing the Hinge Covers
- Removing the Switch Cover
- Removing the Keyboard
- Removing the Speaker Module
- Removing the LCD Module
- Removing the Upper Cover
- Removing the Finger Print Reader
- Removing the TouchPad Bracket
- Removing the RTC Battery
- Removing the Bluetooth Module
- Removing the USB Board
- Removing the Modem Module
- Removing the Mainboard
- Removing the RJ-11 Port
- Removing the Thermal Module
- Removing the CPU
- LCD Module Disassembly Process
- LCD Module Reassembly Procedure
- Main Module Reassembly Procedure
- Replacing the CPU
- Replacing the Thermal Module
- Replacing the RJ-11 Port
- Replacing the Mainboard
- Removing the RTC Battery
- Replacing the USB Board
- Replacing the Bluetooth Board
- Replacing the Modem Module
- Replacing the TouchPad Bracket
- Replacing the Finger Print Reader
- Replacing the Upper Cover
- Replacing the LCD Module
- Replacing the Speaker Module
- Replacing the Keyboard
- Replacing the Switch Cover
- Replacing the Hinge Covers
- External Module Reassembly Process
- Troubleshooting
- Common Problems
- Power On Issue
- No Display Issue
- Random Loss of BIOS Settings
- LCD Failure
- Built-In Keyboard Failure
- Touchpad Failure
- Internal Speaker Failure
- Internal Microphone Failure
- HDD Not Operating Correctly
- ODD Failure
- USB Failure (Rightside)
- Modem Function Failure
- Wireless Function Failure
- Bluetooth Function Failure
- EasyTouch Button Failure
- Media Board Failure
- Fingerprint Reader Failure
- Thermal Unit Failure
- External Mouse Failure
- Other Failures
- Intermittent Problems
- Undetermined Problems
- POST Codes Tables
- Common Problems
- Jumper and Connector Locations
- FRU (Field Replaceable Unit) List
- Model Definition and Configuration
- Test Compatible Components
- Online Support Information
- Index
Chapter 2 163
LS-4494P Fingerprint Board
LS-4495P USB Board
Clearing Password Check and BIOS Recovery
This section provide you the standard operating procedures of clearing password and BIOS recovery for
Aspire 4540/4240. Aspire 4540/4240 provides one Hardware Open Gap on main board for clearing password
check, and one Hotkey for enabling BIOS Recovery.
JUSB1 USB Connector JHP1 Head-Phone Jack
U6 VRAM JMIC1 MIC-In Jack
JPLINE1 Line-In Jack U4 GPU
U8 VRAM U14 South Bridge
JREAD1 Card Reader Connector JDIMM1 MemoryDIMM1 Connector
JDIMM2 MemoryDIMM2 Connector JSATA1 ODD Connector
JSATA2 HDD Connector JMINI1 Wireless Card Connector
PJP2 Battery Connector JCPU1 CPU Socket
U3 North Bridge
Item Description Item Description