Power On Issue, Computer Shutsdown Intermittently | Panasonic 5741

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 140) 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 243.

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Chapter 4

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Panasonic 5741G manual Power On Issue, Computer Shutsdown Intermittently

Contents

Aspire 5741/5741G Series Service Guide Revision History Copyright III Conventions Preface Page Table of Contents Troubleshooting 129 Viii Microsoft Windows 7 Environment Test AspireAspire 5741G Table of Contents Features Chapter Storage subsystem AudioStorage Optical Media Drive Dimensions and weight Power subsystemPrivacy control Special keys and controls Warranty SoftwareOptional Items Environment System Block Diagram Your Acer Notebook tour Front ViewIcon Description HDD Closed Front View Left View Right View Hdmi Icon Function Description IndicatorsBottom View TouchPad Basics Function Left Button Right Button Main TouchPad Lock key Description Using the KeyboardLock Keys and embedded numeric keypad Windows Keys Key Description Hot Keys Hotkey Icon Function Description Hardware Specifications and Configurations SpecificationCPU Core Bus Cache Package Acer P/N Speed Size Voltage Fan Acoustic Specifications Operation Application Loudness Sone Tone dB Mode DBABios System Memory Specification 0MB Onboard LAN SpecificationMemory Combinations Slot Total Memory Hard Disk Drive Interface Specification Super-Multi Drive Module Audio Interface Specification Power and Keyboard Controller Specification Battery Specification Cell SANYO/SONY/PANASONIC/SAMSUNG/SIMPLO AS2009A Lvds LCD SpecificationCard Reader Specification Bios Setup Utility Navigating the Bios Utility Aspire 5741/5741G Bios InformationParameter Description Uuid Graphics 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 Exit Exit Saving Changes Bios Flash Utilities DOS Flash Utility USB HDDPage WinFlash Utility Remove HDD/BIOS Password Utilities Remove HDD PasswordPassword UnlockHD Removing Bios Passwords Cleaning Bios Passwords Using Boot Sequence Selector Output Using DMIToolsInput Using the LAN MAC Eeprom Utility Chapter Machine Disassembly and Replacement Disassembly Requirements Pre-disassembly Instructions Disassembly Process Main Screw List Quantity Part Number Screw List Step Quantity External Module Disassembly ProcessExternal Modules Disassembly Flowchart Removing the Battery Pack Removing the SD Dummy Card Removing the Optical Drive Module Step Size Quantity Screw Type ODD Module M2.5*8 Step Size Quantity Screw Type ODD Bracket M2*3 Removing the Logic Lower Door Step Size Quantity Screw Type Logic lower door M2.5*8 Removing the 3G Cover Step Size Quantity Screw Type 3G Cover M2.5*8 Removing the Dimm Module Removing the Wlan Module Step Size Quantity Screw Type Wlan Module M2*3 Detach the Wlan Board from the Wlan socket Chapter Removing the Hard Disk Drive Module Step Size Quantity Screw Type HDD Carrier M3*3 Main Unit Disassembly Process Main Unit Disassembly Flowchart Removing the Keyboard Chapter Removing the Upper Cover Step Size Quantity Screw Type Chapter Release the locking latch on a Disconnect a as shown Step Size Quantity Screw Type Upper Cover M2.5*5 Removing the Left Speaker Module Lift the Speaker clear of the Upper Cover Removing the Right Speaker Module Lift the Right Speaker Module clear of the device Removing the Power Board Step Size Quantity Screw Type Power board M2*3 Removing the TouchPad Bracket Step Size Quantity Screw Type TouchPad Bracket M2*3 Removing the Card Reader Board Step Size Quantity Screw Type Card Reader M2*3 Removing the USB Board USB Removing the Bluetooth Board Removing the Mainboard Step Size Quantity Screw Type Mainboard M2.5*5 Page Chapter Removing the Thermal Module Step Size Quantity Screw Type Thermal Module M1.98*3 Carefully lift the Thermal Module clear of the Mainboard Removing the CPU LCD Module Disassembly Process LCD Module Disassembly Flowchart Removing the LCD Assembly Chapter Step Size Quantity Screw Type LCD assembly M2.5*8 Removing the LCD Bezel Step Size Quantity Screw Type LCD Bezel M2.5*6 Removing the Camera Module Removing the LCD Panel Step Size Quantity Screw Type LCD Panel M2.5*6 Lift the LCD Panel clear of the module Chapter Removing the LCD Brackets and FPC Cable Step Size Quantity Screw Type LCD Brackets M2*3Page Disconnect the Lvds cable from the panel Removing the Microphone Cable Lift the microphone set clear of the panel Removing the Antennas Chapter LCD Module Reassembly Procedure Replacing the Antennas Chapter Replacing the Microphone Cable Replacing the LCD Brackets and FPC Cable Page Replacing the LCD Panel Replacing the Camera Module Place the Camera in the module Connect the camera cable Replacing the LCD Bezel Replacing the LCD Assembly 102 Chapter Page Main Module Reassembly Procedure Replacing the CPU Replacing the Thermal Module Replacing the Mainboard Page 108 Chapter Replacing the Bluetooth Board Replacing the USB Board Replacing the Card Reader Board Replacing the TouchPad Bracket Page Replacing the Power Board Replacing the Right Speaker Module Replacing the Left Speaker Module Replacing the Upper Cover 118 Chapter Connect B as shown Connect a as shown Replacing the Keyboard Replacing the Hard Disk Drive Module Replacing the Wlan Module Replacing the Dimm Modules Replacing the 3G Cover Replacing the Logic Lower Door Replacing the ODD Module Replacing the SD Dummy Card Replacing the Battery 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 Select Set up microphone Sound ProblemsMicrophone Problems Select Startup Repair HDD Not Operating CorrectlySelect Repair your computer ODD Failure ODD Not Operating Correctly Discs Do Not Play Drive Not Detected Wireless Function Failure Thermal Unit Failure External Mouse Failure Other Failures Dimm Intermittent ProblemsUndetermined Problems 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 Fast Recovery Start Flash Smmacpidisablestart SMM Smmacpidisableend SMM Top View SW2/SW3JTP1 JUSB2 JHP1 JBT1JDIMM1 JDIMM2 Power Board USB ConnectorUSB/B Board Description JREAD1 3G/B BoardCR/B Board Clearing Password Check and Bios Recovery Clearing Password CheckSteps for Clearing Bios Password Check Clear Cmos Jumper Bios Recovery by Crisis Disk Bios Recovery Boot BlockBios Recovery Hotkey Steps for Bios Recovery from USB Storage FRU Field Replaceable Unit List Description Acer P/N Aspire 5741/5741G Exploded DiagramsMain Assembly Upper Assembly TBD LCD Assembly Antenna WlanMain AUX Description Acer P/N LCD Cover 60.PSV02.003 Aspire 5741/5741G FRU List CategoryAcer Description AcerPN Board CASE/COVER/BRACKET Assembly Keyboard LCD Mainboard HeatsinkSpeaker Miscellaneous HDD/HARD Disk Drive CPU/PROCESSORLCD Panel Battery DVD RW DriveBD Combo Drive Memory Adapter Hipro 90W 19V 1.7X5.5X11 Blue HP AdapterAdapter Hipro 65W 19V 1.7X5.5X11 Yellow HP Screw Screw ListCategory Description Chapter 169 Model Definition and Configuration Appendix a Aspire Model Acer Part No Country DescriptionAAP Emea TWN Gctwn China AS5741 LX.PSV02.053 AS5741 LX.PSV02.038 USA Memory Chip Model Acer Part NoCPU LCD VGA Vram 433G25Mn AS5741 LX.PSV02.05 AS5741 LX.PSV02.02 Model Acer Part No Memory HDD ODDMedia 1GB 2GB Processor AS5741 LX.PSV02.089 N320GB5 AS5741 LX.PSV02.067 N640GB5 AS5741 LX.PSV02.047 N320GB5 AS5741 LX.PSV02.023 N320GB5 LAN1 VoipSW1 187 SW1 189 Voip Aspire 5741G W7HP64ATFR1 MCW7HP64ATES1 MC W7HP64ATDE1 MC W7HP64ATGR1 MC W7HP64KATKR1 MCW7HP64ATPL1 MC W7HB64SCATCN1 MC W7HP64ATNL1 MC W7HP64ATLU3 MCW7HP64ATBE1 MC W7HP64ATTW1 MC W7HP64ATSG1 MC W7HP64ATEU5 MCW7HP64ATEU7 MC W7HP64RUATUK1 MC W7HP64RUATRU1 MCW7HP64EMATME4 MC W7HP64EMATME2 MC W7HP64EMATDZ1 MC W7HP64EMATZA1 MCW7HP64EMATME3 MC W7HP64EMATME6 MC W7HP64ATGB1 MC W7HP64ATHU1 MCW7HP64ATCZ2 MC W7HP64ATBC4 MC W7HP64ATBC3 MC W7HP64ATCS1 MCW7HP64ATEU4 MC W7HP64ATCH1 MC W7HP64AWW1 MC AS5741G LX.PSZ02.061 AS5741G LX.PSZ02.053 AS5741G LX.PSZ02.043 AS5741G LX.PSZ02.030 W7HP64ATHK2 MC N11PG 1G-DDR3 SO2GBI SO2GBIII Wxgag V2HN11PG 1G-DDR3 SO2GBI SO1GBIII N11PG 1G-DDR3 SO4GBI SO2GBIII N11PG 1G-DDR3 SO2GBI N11PG 1G-DDR3 SO4GBI 64*16*8 II10 AS5741G LX.PTD02.030 N11PG 1G-DDR3 SO1GBI SO1GBIII ParkSO2GBI SO2GBIII Wxgag DDR3 SO1GBI SO2GBIII AS5741G LX.PSZ02.048 II10 32*16*8 AS5741G LX.PSZ02.030 II10 32*16*8 AS5741G LX.PSZ02.013 HDD 1GB ODD NBDCB4XS AS5741G LX.PTD02.067 333G32Mn AS5741G LX.PTD02.045 333G32Mn AS5741G LX.PTD02.021 334G50Mn AS5741G LX.PSZ0C.009 334G64Mn AS5741G LX.PSZ01.001 334G32Mn AS5741G LX.PSZ02.027 LX.PTD0C.0 Model Acer Part No Media Extra Card Wireless BluetoothPhone SW1 223 Voip LX.PSZ0C.0 AS5741G LX.PSZ02.05 McAfee 3rd WiFi 333G32Mn Build 2x2 BGN 227 Voip Test Compatible Components Appendix B Microsoft Windows 7 Environment Test Vendor Type DescriptionRAM Sodimm DDR3-1G RAM Sodimm DDR3-2G HDD LCD N15.6WXGAGLCD NLED15.6WXGAG VGA ChiP Power Cord BatteryNB ChiPset AdaPter Touch Pad Hinge NEW80LCDBRKR156ASSY Assy NEW80LCDBRKR156ASSY Assy ChaoliNEW90LCDBRKR156ASSY Assy 3G card Wlan Card Antenna Wire Set Blue ToothCamera DC-IN Jack Conn SET 0C9 LED LCD-M/B WConn SET 0C9 LED LCD-M/B W/O Camera MEC Cmos Conn SET 0C9 LED LCD W/O Camera MEC FFC Inverter SPeaker Thermal Module UMA Core Logic 242 Online Support Information Appendix C 244 Index Removing 68, 69, 70 247 248