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Aspire Digital 4625G manual Power On Issue, Computer Shutsdown Intermittently

Models: 4625G 4625

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Power On Issue

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 118) 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 165.

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Chapter 4

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Aspire Digital 4625G manual Power On Issue, Computer Shutsdown Intermittently

Contents

Aspire 4625/4625G Series Service Guide PRINTED IN TAIWANDate Revision HistoryUpdates ChapterCopyright DisclaimerConventions SCREEN MESSAGESPreface Page Machine Disassembly and Replacement Table of ContentsSystem Specifications System UtilitiesTable of Contents TroubleshootingTable of Contents Jumper and Connector LocationsTable of Contents Chapter System SpecificationsFeatures Operating SystemStorage Dimensions and weightAudio Optical DriveI/O interface Power adapter and batterySpecial keys and controls SoftwareOptional Items One-year International Travellers Warranty ITW WarrantyEnvironment Temperature Operating 41 F to 95 F 5 C to 35 CNORTH BRIDGE System Block DiagramAMD Champlain ChapterIcon Your Acer Aspire Notebook tourFront View DescriptionIcon DescriptionIcon Closed Front ViewLeft View DescriptionIcon Right ViewBottom View DescriptionDescription IndicatorsIcon IconLeft Button TouchPad BasicsFunction Right ButtonDesired access Using the KeyboardLock Keys and embedded numeric keypad Lock keyWindows Keys DescriptionIcon Hot KeysHotkey FunctionSkew Comparison Hardware Specifications and ConfigurationsPart CPU Fan True Value Table Performance Mode SpecificationProcessor Specifications PartSpecification CPU Fan True Value Table Power Saving ModeBIOS SpecificationMemory Combinations SpecificationSpecification SlotSpecification Wireless ModuleSpecification BluetoothSpecification Hard Disk Drive InterfaceSpecification Super-Multi Drive ModuleBattery SpecificationSpecification SpecificationSpecification SpecificationSystem LED Indicator SpecificationSpecification LCD Display Supported ResolutionResolution SpecificationSpecification SpecificationSpecification Card ReaderStandby System Power ManagementInitial SuspendChapter System Utilities BIOS Setup UtilityNavigating the BIOS Utility ChapterExit Aspire JV41 BIOSInformation F5/F6Security MainBoot ExitInformation SecurityBoot MainSet Supervisor Password Setting a PasswordRemoving a Password Confirm New PasswordInformation Main BootBoot SecurityInformation ExitBoot SecurityBIOS Flash Utilities Information Main DOS Flash UtilityBoot SecurityPerform the following steps to use the WinFlash Utility WinFlash Utility2. Click OK to begin the update. A progress screen displays 1. Double-click the WinFlash executableRemove HDD/BIOS Password Utilities Remove HDD PasswordRemoving BIOS Passwords Chapter Clearing BIOS Passwords ChapterUsing Boot Sequence Selector Using DMIToolsUsing the LAN MAC EEPROM Utility Configuring UUID Values2. Run UUID.bat Disassembly Requirements Machine Disassembly and ReplacementChapter General Information Pre-disassembly InstructionsDisassembly Process Main Screw ListScrew List External Module Disassembly ProcessExternal Modules Disassembly Flowchart StepPlease detach the battery and follow local regulations for disposal Removing the Battery PackChapter 2. Pull it out from the slot Removing the SD dummy card1. Push the SD dummy card all the way in to eject it ChapterSize Removing the Lower CoverStep QuantitySize Removing the Optical Drive ModuleStep QuantityQuantity StepSize Screw Type3. Remove the DIMM module Removing the DIMM Modules1. See “Removing the Lower Cover” on page 4. Repeat steps for the second DIMM module if presentSize Removing the WLAN ModuleStep Quantity4. Detach and remove the WLAN Board from the WLAN socket ChapterSize Removing the Hard Disk Drive ModuleStep QuantityScrew List Main Unit Disassembly ProcessMain Unit Disassembly Flowchart StepRemoving the Keyboard Removing the Upper Cover C D AB4. Release the locking latch and remove B as shown 3. Disconnect A as shown5. Release the locking latch and remove C as shown 6. Release the locking latch and remove D as shownQuantity StepSize Screw Type1. See “Removing the Upper Cover” on page Removing the Power Switch Board2. Locate the Power Switch Board in the Upper Cover ChapterSize Removing the Function BoardStep QuantityQuantity StepSize Screw TypeSize Removing the USB BoardStep QuantityStep Removing the Bluetooth ModuleBluetooth Board Size1. See “Removing the Upper Cover” on page Removing the LCD Module2. Disengage the WiFi antennas from the guides on the bottom cover Chapter5. Pull up on the LVDS cable to disconnect it from the mainboard 4. Peel back the adhesive holding the LVDS cableChapter Size 7. Remove the four securing screws two each side from the LCD moduleStep Quantity2. See “Removing the LCD Module” on page Removing the Mainboard1. See “Removing the Bluetooth Module” on page 3. Disconnect the right speaker cableSize Removing the Thermal ModuleStep QuantityQuantity StepSize Screw Type1. See “Removing the Mainboard” on page Removing the PCH Thermal ModuleRemoving the CPU 2. remove the two 2 screws from the PCH Thermal ModuleRemoving the RTC Battery Please detach the mainboard and follow local regulations for disposalScrew List LCD Module Disassembly ProcessLCD Module Disassembly Flowchart StepSize Removing the LCD BezelStep Quantity2. Disconnect the camera cable 3. Remove the Camera from the module Removing the Camera Module1. See “Removing the LCD Bezel” on page ChapterSize Removing the LCD PanelStep Quantity1. See “Removing the LCD Panel” on page Removing the FPC Cable5. Lift the LCD Panel clear of the module as shown 4. Remove the FPC cable from the panel2. Remove the adhesive tape covering the microphone cable Removing the Microphone Module1. See “Removing the LCD Panel” on page 3. Disengage the cable from the cable guides2. Disengage the left antenna cable from the guides Removing the Antennas1. See “Removing the LCD Panel” on page 3. Disengage the right antenna cable from the guidesSize Removing the HingesStep QuantityLCD Module Reassembly Procedure Replacing the MIC and WiFi Antennas7. Ensure the antenna cables pass through the hinge well as shown Replacing the FPC Cable6. Replace the adhesive tape onto the microphone cable Chapter3. Place the LCD Panel into the module as shown Replacing the LCD Panel2. Press down on the adhesive tape to secure the FPC cable in place 4. Replace the four 4 securing screws to secure the LCD Panel2. Connect the cable to the camera module Replacing the Webcam1. Place the camera in the LCD Module ChapterReplacing the LCD Bezel Replacing the CPU Main Module Reassembly ProcedureReplacing the RTC Battery CPU Pin1 LocatorReplacing the Thermal Module 2. Replace the two 2 screws to secure the PCH Thermal Module Replacing the PCH Thermal Module1. Replace the PCH Thermal Module onto the Mainboard ChapterPage 2. Replace the four securing screws two each side to the LCD module Replacing the LCD Module1. Replace the LCD module onto the chassis Chaptercover 6. Replace the WLAN cables into the cable guides 4. Snap the FPC cable into place 5. Connect the right speaker cableChapter 8. Insert the WLAN cables into the cable guides as shown Chapter1. Connect the Bluetooth cable to the Mainboard Replacing the Bluetooth Module2. Secure the Bluetooth module in place using the one 1 screw Chapter4. Replace the single securing screw Replacing the USB Board1. Replace the USB Board in the Lower Cover ChapterReplacing the Power Switch Board Replacing the Function Board2. Lower the cover into position and press down the sides as shown Replacing the Upper Cover1. Place the Upper Cover on the Lower Cover back edge first Chapter5. Connect the four cables to the Mainboard as shown C D AB4. Replace the eight 8 securing screws as shown Chapter7. Insert B as shown and close the locking latch 6. Connect A as shown8. Insert C as shown and close the locking latch 9. Insert D as shown and close the locking latch3. Press down as indicated to secure the Keyboard in place Replacing the KeyboardChapter 2. Secure the ODD bracket with the two screws Replacing the ODD ModuleReplacing the Hard Disk Drive Module 4. Replace the single screw to secure the Module3. Slide the HDD to the right to connect the interface 2. Insert the HDD, left side first, and lower it into placeChapter 1. Insert the WLAN board into the WLAN socket Replacing the WLAN BoardReplacing the DIMM Modules 1. Insert the DIMM Module in place2. Secure the five captive screws to hold the covers in place Replacing the Lower Covers1. Replace the HDD Cover as shown ChapterReplacing the Battery Pack Replacing the Dummy CardsSymptoms Verified TroubleshootingCommon Problems ChapterPower On Issue Computer Shutsdown IntermittentlyNo Display Issue No POST or VideoRandom Loss of BIOS Settings Abnormal Video DisplayBuilt-In Keyboard Failure LCD FailureChapter TouchPad Failure Internal Speaker FailureMicrophone Problems Sound Problemsb. Select Set up microphone d. Select Repair your computer HDD Not Operating Correctlyg. Select Startup Repair ODD Failure ODD Not Operating CorrectlyPlayback is Choppy Discs Do Not PlayDiscs Do Not Burn Properly a. Navigate to Start´ Control Panel´ Hardware and Sound´ AutoPlayDrive Not Detected Drive Read FailureWireless Function Failure Thermal Unit FailureExternal Mouse Failure Other FailuresIntermittent Problems Undetermined ProblemsPOST Routine Description Post CodesCode CodePOST Routine Description CodeBeeps CodePOST Routine Description CodeBeeps CodeBeeps For Boot Block in Flash ROMCode POST Routine DescriptionChapter Jumper and Connector LocationsTop View DescriptionDescription Bottom ViewDescription Steps for Clearing BIOS Password Check Clearing Password Check and BIOS RecoveryClearing Password Check Clear CMOS JumperBIOS Recovery Hotkey BIOS Recovery by Crisis DiskBIOS Recovery Boot Block Steps for BIOS Recovery from USB StorageFRU Field Replaceable Unit List ChapterDescription Aspire 4625/4625G Exploded DiagramsLCD Assembly Acer P/NAcer P/N Chassis AssemblyDescription DescriptionDescription DescriptionAcer P/N Acer P/NCategory FRU ListBattery PartnameDescription CategoryPartname CablesPartname CategoryDescription Partname Case/Cover/Bracket/AssemblyCategory DescriptionDescription CategoryPartname DVD RW DrivePartname CategoryDescription Description CategoryPartname KeyboardPartname CategoryDescription Description CategoryPartname LCD ModuleDescription CategoryPartname MainboardDescription CategoryPartname MemoryDescription CategoryPartname HeatsinkPart Name Screw ListDescription Aspire 4625/4625G Model Definition and ConfigurationAppendix A ModelAcer ModelCountry DescriptionAcer ModelCountry DescriptionAcer ModelCountry DescriptionAcer Part No ModelCountry BOM NameAcer Part No ModelCountry BOM NameAcer Part No ModelCountry BOM NameAcer Part No ModelCountry VRAMAcer Part No ModelCountry VRAMAcer Part No ModelCountry HDD 1GBAcer Part No ModelCountry HDD 1GBTest Compatible Components Appendix BVendor Microsoft Windows 7 Environment TestBattery TypeType VendorDescription Description VendorType KeyboardType VendorDescription Description VendorType ModemVendor WiFi AntennaWireless LAN TypeAppendix B Online Support Information Appendix CAppendix C Index