Power On Issue, Computer Shutsdown Intermittently | Acer 5942G

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 (see “Thermal Unit Failure” on page 144) 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 231.

132

Chapter 4

Image 144

Acer 5942G manual Power On Issue, Computer Shutsdown Intermittently

Contents

Aspire 5942/5942G Series Service Guide Revision History Copyright III Conventions Preface Page Table of Contents Troubleshooting 131 Viii Aspire 5942 Series Microsoft Windows 7 Environment Test Table of Contents Features Chapter Dimensions and Weight Power subsystemAudio Communication Interface Environment System Block Diagram Clock Generator Your Acer Notebook tour Front ViewIcon Description HDD1 Closed Front View Rear ViewLeft View Hdmi Right View 1394 Bottom View 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 KeysUS dollar sign Hardware Specifications and Configurations System Memory Specification 2MB4GB 8GB LAN Interface Specification Wireless Module SpecificationMemory Combinations Slot Total Memory 0MB Specification Hard Disk Drive Interface Specification Performance SpecificationsDC Power Requirements Drive Format Blueray Drive BD-RE, BD-R, BD-ROMDVD-R, DVD-RW, +R, +RW, CD-R, CD-RW Blueray Combo Module Audio Interface Specification Super-Multi Drive ModuleSystem Board Major Chips Controller Keyboard Specification Battery Specification CellLCD 15.6 HD Specification Chapter Bios Setup Utility Navigating the Bios Utility Information Parameter DescriptionUuid Disabled MainParameter Description Format/Option Disabled or SecurityParameter Description Option Clear or Set Setting a Password Removing a Password Changing a Password Continue Boot USB Cdrom Exit Cmos Bios Flash Utilities DOS Flash Utility Chapter WinFlash Utility Remove HDD/BIOS Password Utilities Remove HDD PasswordPassword UnlockHD Removing Bios Passwords Cleaning Bios Passwords Using Boot Sequence Selector Using DMITools InputOutput Using the ICW50/ICY70 LAN MAC Utility Chapter Machine Disassembly and Replacement Disassembly Requirements Pre-disassembly Instructions Disassembly ProcessGeneral Information Main Screw List Quantity Part Number External Module Disassembly Process External Modules Disassembly FlowchartScrew List Step Quantity ODD Removing the Battery Pack Removing the Express Dummy Card Removing the SD Dummy Card Removing the Lower Covers Wlan HDD Removing the Optical Drive Module Step Size Quantity Screw Type ODD Module M2.5*5 Step Size Quantity Screw Type ODD Bracket M2*3 Removing the Hard Disk Drive Module Step Size Quantity Screw Type HDD Carrier M3*3 Removing the Dimm Modules Removing the Wlan Module Step Size Quantity Screw Type Wlan Module M2*3 Chapter Main Unit Disassembly Process Upper Cover Disassembly Flowchart Lower Cover Disassembly Flowchart VGA/MXMCpuscrewsprin Removing the Keyboard Chapter Removing the Upper Cover Step Size Quantity Screw Type Step Size Quantity Screw Type Keyboard Cover M2.5*5 Page Removing the Media Board Securing ClipPage Removing the Launch Board Page Removing the Speaker Module Step Size Quantity Screw Type Speaker Module M2.5*3Page Removing the Power Saving Board Step Size Quantity Screw Type Power Saving M2.5*3 BoardPage Removing the Volume Control Board Step Size Quantity Screw Type Volume Control M2.5*3 Board Removing the MIC Board Removing the Button Board and Finger Print Reader Step Size Quantity Screw Type Button Board M2.5*5 Step Size Quantity Screw Type Finger Print M2*3 Reader Remove the Finger Print Reader from the bracket as shown Removing the TouchPad Bracket Step Size Quantity Screw Type TouchPad M2.5*3 Bracket Removing the LCD Module Chapter Page Chapter Step Size Quantity Screw Type LCD Module M2.5*5 Chapter Removing the Saddles Step Size Quantity Screw Type Right Saddle M2.5*5 Lift the right side Saddle clear of the Lower Cover as shown Removing the USB Board Step Size Quantity Screw Type USB Board M2.5*3 Removing the Subwoofer Removing the Bluetooth Module Disconnect the cable from the Bluetooth Module Removing the Card Reader Board Step Size Quantity Screw Type Card Reader M2.5*3 Board Removing the Hinge Wells Step Size Quantity Screw Type Hinge Wells M2.5*3 Removing the Mainboard Step Size Quantity Screw Type Mainboard M2.5*3 Removing the RTC Battery Removing the VGA/MXM Card Removing the Thermal Module Step Size Quantity Screw Type Thermal ModulePage Removing the CPU Main Module Reassembly Procedure Replacing the CPU Replacing the Thermal Module Replacing the VGA/MXM Card Replacing the Mainboard Replacing the Hinge Wells Replacing the Card Reader Board Replacing the Bluetooth Module Connect the Bluetooth cable to the module as shown Replacing the Subwoofer Replacing the USB Board Replacing the Saddles Replacing the LCD Module Replacing the TouchPad Bracket Step Size Quantity Screw Type TouchPad M2.5*3 Bracket Replacing the Button Board and Finger Print Reader Page Adhere the Button Board FFC to the back of the touchpad Replacing the MIC Board Replacing the Volume Control Board Replacing the Power Saving Board 114 Chapter Replacing the Speaker Module 116 Chapter Replacing the Launch Board 118 Chapter Replacing the Media Board Replacing the Upper Cover Page 122 Chapter Step Size Quantity Screw Type Replacing the Keyboard Replacing the Wlan Module 126 Chapter Replacing the Dimm Modules Replacing the Hard Disk Drive Module Replacing the ODD Module Replacing the Lower Covers Replacing the SD Dummy Card Replacing the Battery Replacing the PCI Express Dummy Card 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 Wireless Function Failure Modem Function Failure Thermal Unit Failure External Mouse Failure Other Failures Intermittent Problems Undetermined ProblemsDimm Post Code Range Phase Post Codes Peicpuhtreset PEI Peimemoryinstall PEIPeiswitchstack PEI Peienterrecoverymode PEI DXECF9RESET Dxesmmaccess DXEDxesmarttimerinit DXE Dxetcgdxe DXE Bdsinstallhotkey BDS Bdsbeforepciioinstall BDSBdsenumerateallbootoption BDS Bdsendofbootselection BDS Bdsrecoverystartflash BDS PostbdsnobootdevicePostbdsjumpbootsector Smmacpienablestart SMM Smmacpidisablestart SMM Smmacpidisableend SMM Top View Bottom View LS-5511P Switch Board LED3SW3 LED2 LS-5512P Media Board LS-5513P TV-Tuner Board ANT1 LS-5514P Card Reader Board JMINI2JREAD1 JMINI1 LS-5515P Touch Pad Button Board LS-5516P Power Saving Board Top View Bottom View Description LS-5517P Volume Board LS-5518P Color Engine Board Clearing Password Check and Bios Recovery Clearing Password CheckSteps for Clearing Bios Password Check Hardware Open Gap Description 164 Chapter 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 Aspire 5942 Series Exploded Diagrams Main AssemblyDescription Acer P/N Base Assembly Aspire 5942 Series FRU List Description Acer Part Number Power Saving Cable Blue Tooth CableFFC USB Cable HDD Connector VR Button Volume ControlHDD Door Mini Door Keyboard ODD SUPER-MULTI Drive Module ODD BEZEL-SMODD Bracket ODD BD Combo Module ODD BD RW Module Assy LED Module 15.6W Wxga GlareLCD COVER-IMRBLUE Antenna WIMAX-MAIN CPU Thermal Moudle CAF CPU Thermal Moudle ArrandaleMIC Speaker R&L Screw List Category Description Acer P/N ScrewScrew M2.5D 5L K 5.5D ZK NL CR3 Appendix a Aspire 5942 SeriesModel Country Acer Description China W7HP64EMATMY1 MC W7UT64EMATPH1 MC W7HP64EMATME2 MC W7HP64EMATME9 MC W7HP64EMATME3 MCW7HP64EMATME6 MC Emea LX.PM AS5942G-728G64Bn W7HP64ATGR1 MC AS5942G-724G64Bn EM W7HP64EMATZA4 W7HP64EMATTR1 MC W7HP64EMATZA2 MCTWN Gctwn LX.PM S2.PM LX.PMT Emea LX.PMT AS5942G-434G64Bn W7HP64ATGR1 MC W7HP64EMATDZ1 MC W7HP64EMATZA1 MCW7HP64EMATZA4 MC AS5942G-434G64Mn W7HP64ATPL1 MC AS5942G-434G64Mn W7HP64ATES1 MC AS5942G-334G50Mn W7HP64ATDE1 MC AS5942G-334G50Mn W7HP64ATGB1 MC Gctwn S2.PMT Gctwn S2.PM AS5942G-434G64Mn W7UT64ATES1 MC AS5942G-334G32Mn W7HP64ATEU5 MC LX.PS5 Model BOM Name VGA Chip 334G50Mi PbkQV3 Appendix a 200 334G64Bn PbkQV3 434G50Mi PbkQV3 434G64Mn PbkV3 436G64Mn PbkV3 524G64Bn PbkV3 724G50Mn PbkV3 207 AS5942GMADISONPRO1GBC AS5942G AS5942GMADISONPRO1GBCb Ci3330M AS5942GMADISONPRO1GBTC ParkxtDDR3 Card Reader Wireless 1GB Model Memory N320GB5 1-Build 3rd WiFi 334G50Mn 4KS 2x2 BGN 1-Build 3rd WiFi 334G64Bn 4KS 2x2 BGN AS5942G 1-Build 3rd WiFi 434G50Mn 4KS 2x2 BGN AS5942G 1-Build INT6300H 434G64Mn 4KS AS5942G 1-Build 3rd WiFi 436G64Mn 4KS 2x2 BGN AS5942G 1-Build 3rd WiFi 524G50Mn 4KS 2x2 BGN AS5942G 1-Build 3rd WiFi 724G50Mn 4KS 2x2 BGN AS5942G 1-Build 3rd WiFi 724G64Bn 4KS 2x2 BGN Appendix a 220 1-Build INT6200H 724G64Bn 4KS AS5942G 1-Build INT6200H 726G64Mi 4KS AS5942G 1-Build INT6200H 728G64Bn 4KS AS5942G 1-Build INT6200H 728G64Mi 4KS AS5942G Test Compatible Components Appendix B Microsoft Windows 7 Environment Test Type Description Keyboard NB Chipset Remote Controller TV AntennaTV Tuner 230 Online Support Information Appendix C 232 Index ODD 235 236