Power On Issue, Computer Shutsdown Intermittently | Acer 4240

Power On Issue

If the system doesn’t power on, perform the following actions one at a time to correct the problem. Do not replace a non-defective FRUs:

Computer Shutsdown Intermittently

If the system powers off at intervals, perform the following actions one at a time to correct the problem.

1.Check the power cable is properly connected to the computer and the electrical outlet.

2.Remove any extension cables between the computer and the outlet.

3.Remove any surge protectors between the computer and the electrical outlet. Plug the computer directly into a known good electrical outlet.

4.Disconnect the power and open the casing to check the Thermal Unit and fan airways are free of obstructions.

5.Remove all external and non-essential hardware connected to the computer that are not necessary to boot the computer to the failure point.

6.Remove any recently installed software.

7.If the Issue is still not resolved, see “Online Support Information” on page 211.

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Chapter 4

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Acer 4240 manual Power On Issue, Computer Shutsdown Intermittently

Contents

Aspire 4540/4240 Series Service Guide Revision History Copyright III Conventions Preface Page Table of Contents Troubleshooting 137 Viii Aspire 4540/4240 Series Microsoft Windows 7 Environment Test Table of Contents Features Chapter Dimensions and Weight Power subsystemCommunication Privacy control Environment System Block Diagram Icon Description Your Acer Notebook tourHDD Closed Front View Left View Hdmi Right View Bottom View Icon Function Description Touchpad Basics with fingerprint reader Function Left Button Right Button Main touchpad Using the Keyboard Desired access Num Lock on Num Lock offLock key Description Fn + F11 Windows Keys Key Description Euro symbol Using the System UtilitiesUS dollar sign Acer GridVista dual-display compatible Hardware Specifications and Configurations Processor SpecificationProcessor Specifications System Board Major Chips Specifications Smbios 1MB System Memory Specifications Memory Combinations Slot Total Memory Hard Disk Drive Interface Specifications RPM Rate Mbytes/sec Max DC Power Requirements Voltage Super-Multi Combo Module Specification LCD Specification VGA Graphic Controller Specification Keyboard SpecificationAudio Interface Specification Bluetooth Specification Finger Print Reader Specification BatteryPifa Sony AS-2007A Bios Setup Utility Navigating the Bios Utility Information Parameter Description Enables or disables the Press F12 to display boot DisabledMain IDE Ahci Disabled or SecurityParameter Description Option Clear or Set Setting a Password Removing a Password Changing a Password Enter New Password Boot USB CD/DVD ROM Exit Cmos Bios Flash Utilities DOS Flash Utility Flash process begins as shown WinFlash Utility Progress screen displays Chapter Remove HDD/BIOS Password Utilities Remove HDD Password Removing Bios Passwords Cleaning Bios Passwords Using DMITools Using Boot Sequence SelectorMiscellaneous Utilities Using the LAN MAC Eeprom Utility DOS mode, run the MAC.BAT file to write MAC values to eeprom Machine Disassembly and Replacement Disassembly Requirements Pre-disassembly Instructions Disassembly ProcessGeneral Information Main Screw List Description Quantity Acer P/N External Modules Disassembly Flowchart External Module Disassembly ProcessScrew List Step Quantity Removing the Battery Pack Removing the SD Dummy Card Removing the Lower Covers Dimm Remove the HDD Cover as shown Chapter Removing the Wlan Module Step Size Quantity Screw Type Wlan Module M2*3 Removing the Dimm Modules Removing the Hard Disk Drive Module Step Size Quantity Screw Type HDD Carrier M3*3 Removing the Optical Disk Drive Module Step Size Quantity Screw Type ODD Module M2.5*5 Step Size Quantity Screw Type ODD Bracket M2*3 Main Unit Disassembly Process Main Unit Disassembly Flowchart Removing the Hinge Covers Step Size Quantity Screw Type Hinge Covers M2*3 Removing the Switch Cover Step Size Quantity Screw Type Chapter Removing the Keyboard Removing the Speaker Module Step Size Quantity Screw Type Speaker Module M2.5*3Page Removing the LCD Module Step Size Quantity Screw Type LCD Module M2.5*5Page Chapter Remove the two securing screws from the left LCD hinge Remove the two securing screws from the right LCD hinge Removing the Upper Cover Chapter Page Removing the Finger Print Reader Page Removing the TouchPad Bracket Remove the two screws from the TouchPad Bracket Removing the RTC Battery Removing the Bluetooth Module Bluetooth Module Removing the USB Board Step Size Quantity Screw Type USB Board M2.5*3 Removing the Modem Module Step Size Quantity Screw Type Modem Module M2*3Page Removing the Mainboard Step Size Quantity Screw Type Mainboard M2.5*3 Removing the RJ-11 Port Chapter Removing the Thermal Module Step Size Quantity Screw Type Thermal Module 5*3.2 Chapter Removing the CPU LCD Module Disassembly Process LCD Module Disassembly Flowchart Removing the LCD Bezel Step Size Quantity Screw Type LCD Bezel M2.5*5 Lift the bezel away from the panel Removing the Camera Module Step Size Quantity Screw Type Camera Module M2.5*3 Removing the LCD Panel Lift the LCD Panel out of the casing as shown Chapter Removing the LCD Brackets and FPC Cable Removing the Antennas Removing the MIC Module Replacing the MIC Module LCD Module Reassembly ProcedureReplacing the Antennas Chapter Page Replacing the LCD Panel Page Replacing the Camera Module Replacing the LCD Bezel Main Module Reassembly Procedure Replacing the CPU Replacing the Thermal Module Connect fan cable to the mainboard as shown Replacing the RJ-11 Port Replacing the Mainboard Insert the single securing screw Replacing the USB Board Replacing the Bluetooth Board 110 Chapter Replacing the Modem Module Replacing the TouchPad Bracket Page Replacing the Finger Print Reader Replace the single securing screw Chapter 115 Replacing the Upper Cover Page Replace the two securing screws in the Upper Cover Replacing the LCD Module Reconnect the Microphone cable to the Mainboard as shown Page 122 Chapter Replacing the Speaker Module Replacing the Keyboard Page Replacing the Switch Cover Step Size Quantity Screw Type Replacing the Hinge Covers External Module Reassembly Process Replacing the ODD Module Replacing the Hard Disk Drive Module Replace the four securing screws two each side Replacing the Dimm Modules Replacing the Wlan Module Replace the two screws to secure the module Replacing the Lower Covers Replacing the SD Dummy Card Replacing the Battery 136 Chapter Common Problems Symptoms Verified Go To Power On Issue Computer Shutsdown Intermittently No Display Issue No Post or Video Random Loss of Bios Settings Abnormal Video Display LCD Failure Built-In Keyboard Failure Touchpad Failure Internal Speaker Failure Sound Problems Select Set up microphone Microphone ProblemsInternal Microphone Failure Select Repair your computer HDD Not Operating CorrectlySelect Startup Repair ODD Failure ODD Not Operating Correctly Discs Do Not Play Drive Not Detected 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 SecMemory Code Description BDS & Specific action Each Peim entry point used in 80PORT Each Driver entry point used in 80PORT CF9RESET BootpriorityFvbservice Savememoryconfig Legacybios LegacybiosplatformSetuputility Fwblockservice Each SmmDriver entry point used in 80PORT Top View Bottom View JUSB1 JHP1Vram JMIC1 JPLINE1 Clearing Password Check Steps for Clearing Bios Password CheckHardware Open Gap Description Description Location Clear Cmos Jumper Memory bay Bios Recovery by Crisis Disk Bios Recovery Boot BlockBios Recovery Hotkey Steps for Bios Recovery by Crisis Disk 166 Chapter FRU Field Replaceable Unit List Main Module Aspire 4540/4240 Exploded DiagramsCPU Base Category Description Acer PN Battery Aspire 4540/4240 FRU ListBoard Cable Case/Cover/Bracket Assembly Category Description Acer PN Hinge CAP L Hinge CAP RHDD Bracket Mini Card Bracket Keyboard Acer AC4T JV40 Internal KeyboardStandard 87KS Black Nordic Texture Super Multidrive Combo Drive Assy LCD Module 14 Wxga Glare W/ Antenna CAMERA, IMR LED LCD AUO 14 Wxga Glare B140XW01 V0 0A LFLED LCD AUO 14 Wxga Glare B140XW01 V0 1A LF LED LCD Samsung 14 Wxga Glare LTN140AT01 Antenna Mimo R-3X3 LCD Bezel W/O Cmos Lvds Cable W/O Cmos Screw List 33.PAA02.006Speaker Miscellaneous Chapter 179 Appendix a Aspire 4540/4240 SeriesModel Country Acer Part No Description AAP 181 Model Country Acer Part No Description CHI AclaUSA Model Country Acer Part No Description 185 Model Country Acer Part No Description 187 Model Memory Chip NLED14WXGAG UMA SO2GBII6 SO1GBII6 Appendix a 190 ATUM600 NLED14WXGAG UMA SO1GBII6 ATUM620 NLED14WXGAG UMA SO1GBII6Media Processor Extra SW1 NSM8XS NBDCB4XS AS4540-302G25Mn N250GB5.4KS Model Card Reader Wireless LAN1 Bluetooth Voip Phone 195 1-Build 3rd WiFi 1x2 BGN Appendix a 196 197 Appendix a 198 Test Compatible Components Appendix B Microsoft Windows 7 Environment Test BOMNameType Description Adapter Audio Codec Camera Type DescriptionCard Bus1 Finger Print Reader WD3200BEVT-22ZCT0 ML160 Sata LF F WD5000BEVT-22ZAT0 ML250 Sata LF F 204 Acer AC4T AUO NLED14WXGAGSamsung NLED14WXGAG LPL NLED14WXGAG Memory Modem Northbridge Chipset AMD AMDSB710 AMD SB710 Southbridge ChipsetSoftware WiFi Antenna VGA Chip 210 Online Support Information Appendix C 212 Index ODD