Power On Issue, Computer Shutsdown Intermittently | Acer 4736G

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 183.

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Chapter 4

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Acer 4736G, 4736Z manual Power On Issue, Computer Shutsdown Intermittently

Contents

Aspire 4736G/4736Z Series Service Guide Revision History Copyright Conventions Preface Page Table of Contents Viii Aspire 4736G/4736Z Series Microsoft Windows Vista Environment Test Table of Contents Features Chapter Communication Dimensions and WeightPower subsystem Privacy control Environment System Block Diagram Intel Penryn Processor Your Acer Notebook tour Front ViewIcon Description Closed Front View Left View Hdmi Right View Rear View Bottom View Indicators Easy-Launch ButtonsIcon Function Description Touchpad Basics with fingerprint reader Function Left Button Right Button Main touchpad Using the Keyboard Lock Keys and embedded numeric keypad Windows Keys Key Description Hot Keys Hotkey Icon Function Description Euro symbol Special KeyUS dollar sign Using the System Utilities Acer GridVista dual-display compatiblePage Processor Specifications Hardware Specifications and ConfigurationsProcessor Specification System Board Major Chips Specifications Specification System Memory Specifications Memory Combinations Slot Total Memory Hard Disk Drive Interface Specifications Model Name Super-Multi Combo Module Specification Sata Specification Super-Multi Combo Module Blueray Combo Drive Specification DMA LCD Specification LG LP140WH1 Media Card Reader Specification VGA Graphic Controller SpecificationKeyboard Specification Audio Interface Specification Finger Print Reader Specification Battery Chapter Bios Setup Utility Navigating the Bios Utility Information Parameter Description Enables or disables the Press F12 to display boot MainParameter Description Format/Option Parameter Description Option Disabled orSecurity Clear or Set Setting a Password Removing a Password Changing a Password Power Parameter Description Submenu Items Acpi S3 Boot Exit Bios Flash Utility DOS Flash Utility Page WinFlash Utility Remove HDD/BIOS Password Utilities Remove HDD Password Removing Bios Passwords Key in biospw 14452 Cleaning Bios Passwords Using Boot Sequence Selector Using DMIToolsMiscellaneous Utilities Example 2 Write Product Name to Eeprom Chapter Machine Disassembly and Replacement Disassembly Requirements General Information Pre-disassembly InstructionsDisassembly Process Main Screw List Description Quantity Acer P/N External Module Disassembly Process External Modules Disassembly FlowchartScrew List Step Quantity Removing the Battery Pack Removing the SD dummy card Removing the Lower Covers Carefully open the HDD Cover 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 Step Screw Quantity 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 Base Chapter Page Removing the Finger Print Reader Page Removing the TouchPad Bracket Remove the TouchPad Bracket from the Upper Base Chapter Removing the Media Board Step Size Quantity Screw Type Media Board M2.5*3 Removing the USB Board Step Size Quantity Screw Type USB Board M2.5*3 Lift the USB Board clear of the casing Chapter Removing the Modem Module Step Size Quantity Screw Type Modem Module M2*3 Removing the Bluetooth Module Removing the Mainboard Step Size Quantity Screw Type Mainboard M2.5*3Page Removing the RJ-11 Port Page Removing the Thermal Module Page 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 Chapter 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 Removing the LCD Brackets and FPC Cable Removing the Antennas Removing the MIC Module LCD Module Reassembly Procedure Replacing the MIC Module Replacing the Antennas 106 Chapter Ensure that the securing pin is properly located Chapter 107 Replacing the LCD Panel Page Replacing the Camera Module Replacing the LCD Bezel Main Module Reassembly Procedure Replacing the CPU Replacing the Thermal Module Replacing the RJ-11 Port Page Replacing the Mainboard Replacing the Bluetooth Board Replacing the Modem Module Replacing the USB Board Replacing the Media Board 120 Chapter Replacing the TouchPad Bracket Replacing the Finger Print Reader 122 Chapter Replacing the Upper Cover 124 Chapter Page Replacing the LCD Module Chapter 127 Replace the adhesive strip to secure the cables in place Replace the two securing screws Chapter 129 Replacing the Speaker Module Replacing the Keyboard Replacing the Switch Cover Page Replacing the Hinge Covers Replacing the ODD Module Replacing the Hard Disk Drive Module Replacing the Dimm ModulesPlace the HDD carrier on the HDD Replacing the Wlan Module Replacing the Lower Covers Replacing the Battery Replacing the SD Card Dummy Trays 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 Microphone Problems Select Set up microphoneInternal Microphone Failure HDD Not Operating Correctly Select Repair your computerSelect 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 Memory Post Codes TablesSec Code Description BDS & Specific action Each Peim entry point used in 80PORT Each Driver entry point used in 80PORT Securitystub Moniterkey Each SmmDriver entry point used in 80PORT Top View Pin Description Bottom View Steps for Clearing Bios Password Check Clearing Password Check and Bios RecoveryClearing Password Check Hardware Open Gap Description Bios Recovery Hotkey Bios Recovery by Crisis DiskBios Recovery Boot Block Steps for Bios Recovery by Crisis Disk FRU Field Replaceable Unit List Aspire 4736G/4736Z Series Exploded Diagrams Main Module Board Aspire 4736G/4736Z Series FRU ListCategory Description Acer P/N Adapter Cable Case/Cover/Bracket Assembly Category Description Acer P/N CPU/Processor Combo DriveSuper Multi Drive Blueray Combo HDD 33.AD302.004 Keyboard Assy LCD Module 14.1 IN. Wxga Glare W Screw List Appendix a Aspire 4736G/4736Z Series Test Compatible Components Appendix B Microsoft Windows Vista Environment Test Vendor Type Description Finger Print Reader Seagate Sata LF F/W0001SDM1 Norhtbridge Remote ControlVendor Type Description Modem Southbridge Vram Online Support Information Appendix C 184 Index 186