LG Electronics LM50 service manual Ch4. Symptom-to-part index

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Ch4. Symptom-to-part index

·If the voltage is not correct, replace the AC adapter.

·If the voltage is acceptable, do the following :

1.Replace the system board.

2.If the problem persists, check the AC adapter whether it is correct product or not.

Note

Noise from the AC adapter does not always indicate a defect.

·Checking operational charging

1.To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer. Perform operational charging. If the battery status indicator or icon does not turn on, remove the battery does not turn on, replace the battery pack.

2.If the charge indicator still does not turn on, replace the system board. Then reinstall the battery pack.

Note

Do not charge battery pack, when its temperature is below 0 or above 60.

·Checking the battery pack

1.Open the Power Meter window by clicking Start Control Panel Power Options and then; check the total power remains. Battery charging does not start until the power Meter shows that less than 95% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life.

2.To check the status of your batter, move your cursor to the Power Meter icon in the icon tray of the Windows taskbar and wait for a moment (but do not click), and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Meter icon.

Note

If the battery pack becomes hot, it may not be able to charge. Remove it from the computer and Leave it at room temperature for a while. After it cools down, reinstall and recharge it.

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Contents LM40/50 LG Electronics Page Ch1. Service information Before replacing parts„ Strategy for replacing a hard-disk drive Ch1. Service information Safety notices Ch1. Service information Safety information „ General safety Ch1. Service information „ Electrical safety Ch1. Service information Ch1. Service information „ Safety inspection guide „ Grounding requirements Ch1. Service information Laser compliance statement Backup Standby RTC battery safety informationCh1. Service information Read this first „ What to do firstImportant Notes Followings are not covered under warranty Ch2. Locations „ Front view„ Right view 15/14.1 Ch2. Locations „ Rear view 15/14.1„ Left view 15/14.1 Security key hole Kensington Lock„ Specification Ch3. System informationCh3. System information „ Model Configuration Ch3. System information „ System Block Diagram Ch3. System information „ Fn key combinations Ch3. System information „ Status indicators Ch3. System information „ Bios Flash Ch3. System information „ How to update flash ROM in Windows Ch3. System information Ch3. System information „ Bios Setup Ch3. System information „ Default screen Main, Advanced, Security, Boot, ExitCh3. System information „ Using the keys Ch3. System information „ Main Menu · TouchPad Support Ch3. System information „ Advanced Menu· Legacy USB Support · Internal Keypad· Boot-time Diagnostic Screen · Parallel Port· Parallel port modes · Setting a password · Set Supervisor PasswordCh3. System information „ Security Menu Power on Boot · Set User Password Ch3. System information · Password on boot Ch3. System information · Set HDD Password Ch3. System information · Changing or removing a password · Removable Devices Ch3. System information „ Boot Menu· CD-ROM Drive · Hard Drive· Exit Saving Changes · Load Setup DefaultsCh3. System information „ Exit Menu · Exit Discarding Changes· Discard Changes · Save ChangesCh4. Symptom-to-part index „ Power system checkoutCh4. Symptom-to-part index Ch4. Symptom-to-part index Terminal Voltage V dc Ground Ch4. Symptom-to-part index „ Numeric error codes Symptom / Error FRU or action, in sequenceDMA test failed System board 02F6 02F7 Ch4. Symptom-to-part index „ Error message Ch4. Symptom-to-part index „ LCD-related symptoms Ch4. Symptom-to-part index „ Indeterminate problems Removing and replacing a part FRU Ch5. Removing and replacing a partCh5. Removing and replacing a part „ 1010 Battery Pack Ch5. Removing and replacing a part „ 1020 Hard Disk Drive Ch5. Removing and replacing a part „ 1030 Retainer Ch5. Removing and replacing a part Disconnect the keyboard connector Ch5. Removing and replacing a part „ 1040 Retainer Ch5. Removing and replacing a part „ 1050 Fan Assembly Ch5. Removing and replacing a part 1SZZBZ4014A 1SZZBZ4014A Ch5. Removing and replacing a part „ 1070 Wireless LAN Card Ch5. Removing and replacing a part „ 1080 MDC Modem Card Ch5. Removing and replacing a part „ 1090 Display Module Remove two hinge cover screws FRU No Specification Qty Ch5. Removing and replacing a part Ch5. Removing and replacing a part Ch5. Removing and replacing a part Ch5. Removing and replacing a part „ 1100 Keyboard Deck Ch5. Removing and replacing a part 14.1 Ch5. Removing and replacing a part 1SZZBZ4018B Ch5. Removing and replacing a part Ch5. Removing and replacing a part Ch5. Removing and replacing a part „ 1110 Main Board Ch5. Removing and replacing a part Remove the S-Video connector Remove the LAN S/B connector 1SZZBA4014A Hold M/B with your both hand and pull it up to remove 1SZZBA4017B Ch5. Removing and replacing a part Ch5. Removing and replacing a part „ 1130 S-Video Sub-Board Ch5. Removing and replacing a part „ 1140 Display Module Ch5. Removing and replacing a part Ch5. Removing and replacing a part 1SZZBA4041A Ch5. Removing and replacing a part Remove LCD from the LCD rear panel Part lists Ch6. Part lists MKB21Ch6. Part lists LG P/N Specification Remarks MKC08 Mckinley N Sunrex Czech LM Refresh Mckinley N OKI Thailand LM Refresh LG P/N Specification Remarks MKC13 LG P/N Specification Remarks MKS01 LG P/N Specification Remarks MKM08 Case LCD Case LCD MKM22 MKL16 MKL06 MKL05 MKL04 TFT LCD, LG Philips LP150E06-A2 15.0 Inch SXGA+ 100 101 102 Type Intel 4 Layers 1-14 Network Connection103 104 105 Thermal PAD 11X11 MM on Northbridge106 107 108 109 110 Mckinley N OKI Hungary LM Refresh111 112 MEMORY, Hynix HYMD232M646C6-J Sodimm 256MB DDR 333MHZLG P/N Specification 113