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Service Manual
(LW20)
LG Electronics
0
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Contents Ch 1. Service information Ch 2. Locations Ch 3. System information · Specification · Model configuration · System Block Diagram · Fn key combinations · Status indicators · BIOS Flash · BIOS Setup Ch 4. Symptom-to-part index · Power system checkout · Numeric error codes · Error messages · LCD-related symptoms · Indeterminate problems Ch 5. Removing and replacing a part (FRU) Ch 6. Part list · Part list · Exploded view 1
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Ch1. Service information Chapter 1. Service information 1-1. Important service information Strategy for replacing parts (FRU-Field Replaceable Units) Before replacing parts Make sure that latest BIOS and drivers are installed before replacing any parts (FRUs) listed in this Use the following strategy to prevent unnecessary expense for replacing and servicing parts 1. If you are instructed to replacing a part but the replacement does not correct the problem, reinstall the original part before yo
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Ch1. Service information 1-2. Safety notices Warning Before the computer is powered-on after part (FRU) replacement, make sure all screws, springs, and other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical shorts. Warning some standby batteries contain a small amount of nickel and cadmium. Do not disassemble a standby battery, recharge it, throw it into
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Ch1. Service information 1-3. Safety information General safety Follow these rules to ensure general safety · Observe good housekeeping in the area of the machines during and after maintenance. · When lifting any heavy object 1. Ensure you can stand safely without slipping. 2. Distribute the weight of the object equally between your feet. 3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift. 4. Lift by standing or by pushing up with your leg muscles (This action r
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Ch1. Service information Electrical safety Observe the following rules when working on electrical equipment. Important Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges. Do not use this type of mat to protect yourself from electrical shock.
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Ch1. Service information · Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as metal floor strips and machine frames. · Observe the special safety precautions when you work with very high voltages. These instructions are in the safety sections of maintenance information. Use extreme care when measuring high voltages. · Regularly inspect and maintain your electrical hand tools for safe operational condition. · Do not use worn or broken tools and tes
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Ch1. Service information Safety inspection guide The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each machine was designed and built, required safety items were installed to protect users and service personnel from injury. This guide addresses only those items. You should use good judgment to identify potential safety hazards due to attachment of non-LG features or options not covered by this inspection guide. If any unsafe conditions are p
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Ch1. Service information Handling devices that are sensitive to electrostatic discharge Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge. Note Use product-specific ESD procedures wh
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Ch1. Service information 1-4. Laser compliance statement When a CD-ROM drive, DVD drive or the other laser product is installed, note the following : Caution Use of controls or adjustments or performance of procedures other than those specified here in might result in hazardous radiation exposure. Opening the CD-ROM drive, DVD-ROM drive or the other optical storage device could result in exposure to hazardous laser radiation. There are no serviceable parts inside those drives. Do not open Danger
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Ch1. Service information 1-6. Read this first Before you go to the checkout guide, be sure to read this section. Important Notes · Only trained personnel certified by LG should service the computer. · Read the entire FRU removal and replacement page before replacing any FRU. · Use new nylon-coated screws when you replace FRUs. · Be extremely careful during such write operations as copying, saving, formatting. Drives in the computer that you are servicing sequence might have been altered. If you
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Ch1. Service information The followings are not covered under warranty : · CD panel cracked from the application of excessive force or from being dropped · Scratched (cosmetic) parts · Distortion, deformation, or discoloration of the cosmetic parts · Cracked or broken plastic parts, broken latches, broken pins, or broken connectors caused by excessive force · Damage caused by liquid spilled into system · Damage caused by improper insertion of a PC Card or the installation of an incompatible car
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Ch2. Locations Chapter 2. Locations Front view LCD SRS Button MUTE Button Volume Up Volume Down Power Button Keyboard Internal MIC Touchpad Touchpad Button Internal Speaker Internal Speaker 5-in-1 Card Slot Rear view Security key hole USB Connector S-VIDEO Connector Security key hole (Kensington Lock) User can attach a separately purchased chain lock into the security keyhole and connect it to a fixed object to prevent a notebook theft 12
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Ch2. Locations Left view Line-in Connector / SPDIF Connector MIC Connector IEEE 1394 Connector VGA Connector Fan Louver USB Connector Headphone Connector LAN Connector Right view Emergency eject hole Modem Connector ODD Open Button ODD Eject Button Optical Disk Drive AC Connector Emergency eject hole Insert a thin and hard pin into this hole, and you can open the disc tray manually. 13
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Ch3. System information Chapter 3. System information Specification -CPU · Dothan 1.6 ~ 2.1 GHz · μFCPGA - Main Chipset & Graphic · Intel 915GM,ICH6-M - Memory · 2SODIMM – Up to 2GB · DDR2 PC2-3200S/4200S Capable (400/533MHz) - HDD · 1.8" 5mm/8mm 30/40/60GB PATA Type - Communication ·MDC · Modem, Daughter Card Type · Marvell Yukon 88E8053 PCI-E Gigabit Ethernet Controller · Marvell Yukon 88E8036 PCI-E 10/100 Ethernet Controller - Wireless LAN Solution · 802.11bg/abg Mini PCI Type, Hexa-band Ant
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Ch3. System information System Block Diagram 15 WIND RIVER CPU CORE VCC page45 CK-410M V1.2S / V1.5A THERMAL FAN CONN DOTHAN(NV) page20 SENSOR CPU_CORE page 5V 3.3V page 5 page 5 LEDs CK-SSCD page 2 - 4 GMCH_CORE VCCP VCCP page20 page47 Wireless FSB 533MHz HDD DDR2 DC/DC page46 CAPS LOCK VCCP LCD CONN DDR2 SYSTEM DC/DC 3.3V page18 NUM LOCK DDR2 400/533 MHz 5V/3.3V page48 SODIMM-0 /1 ALVISO-GM CRT CONN GMCH_CORE (1.05V) PWR ON DDR2 5V page19 BATTERY CHARGER S-VIDEO CONN CHG 1.8V page44 page13-15
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Ch3. System information Fn key combinations The following table shows the function of each combination of Fn with a function key. Function of Fn keys has nothing to do with Operating System. [Fn] + [F1] User defined Hot key. (available from OSD Setting) [Fn] + [F2] User defined Hot key. (available from OSD Setting) [Fn] + [F3] User defined Hot key. (available from OSD Setting) [Fn] + [F4] Forces the computer to enter power-saving mode. (ex: system standby and hibernation) Press the combi
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Ch3. System information Status indicators The system status indicators show the status of the computer 1. 2. 3. 4. 5. 6. 1. Num lock Num lock indicator lights up when Num lock key is pressed. By pressing Fn + Scr LK (Num LK) key, you can use the embedded numeric keys. To disable the embedded numeric keys, press Fn + Scr LK (Num LK) key again. - The Num Lock indicator is off while an external keyboard is connected if OSD keyboard setup is configured not to use embedded keypad with an external ke
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Ch3. System information BIOS Flash You can update BIOS using a floppy disk drive. Because this system is not equipped with any floppy disk drive, you have to use an external USB drive for a BIOS update. In order to boot up with an USB drive, please set Removable Device as the first boot up drive in the boot menu of BIOS setup. · How to update flash ROM in DOS 1. Create ‘boot up’ flash update diskette. 2. Copy a ROM image file (*.wph) into the root of the flash update diskette. 3. Copy phlash16.
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Ch3. System information BIOS Setup BIOS (Basic Input and Output System) Setup saves the system configuration in CMOS RAM, and check the configurations during startup. Use the BIOS Setup Utility to change and save the system environment, hardware configurations, power saving mode, etc. · Open the BIOS Setup Utility in the following situations : 1. to change the BIOS setup 2. to replace the backup battery 3. system configuration error occurs 4. to change the boot order 5. to set/change a password
