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Service Manual
(LM40/50)
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 (15”) Volume Up LCD Volume Down Power switch Power-saving mode switch Keyboard TouchPad TouchPad button Built-in speakers IrDA port Front view (14.1”) Volume Up LCD Volume Down Power switch Power-saving mode switch Keyboard TouchPad TouchPad button Built-in speakers IrDA port 12
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Ch2. Locations Rear view (15”/14.1”) Ethernet port Power jack Modem port S-Video Left view (15”/14.1”) ODD tray open button IEEE1394 port SD memory Card slot PC card eject button PC card slot ODD Emergency eject hole USB port Right view (15”/14.1”) Fan louvers Parallel port VGA port USB port Microphone jack Key hole (Kensington Lock) Headphone jack / S-PDIF Security key hole (Kensington Lock) User can attach a separately purchased chain lock into the security keyhole and connect it to a fixe
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Ch3. System information Chapter 3. System information Specification •CPU · Banias 1.3 ~ 1.7 GHz / Dothan 1.7 GHz ·FCPGA • Main Chipset & Graphic · Intel ODEM + ICH4 · Intel Montara GME (Graphic Controller Integrated) · ATi M9+ w/32MB VRAM · ATi M10 w/64MB VRAM • Memory · 2SODIMM – Up to 2GB · DDR200/266/333 Capable • HDD · 2.5” 9.5mm 40/60/80GB • Communication · Modem, Daughter Card Type · 10/100 LAN on Board ·IrDA • Wireless LAN Solution · 802.11b Mini PCI Type, Quad-band Antenna • Cardbus ·
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Ch3. System information Model Configuration 15
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Ch3. System information System Block Diagram 16
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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. + Description User-defined Hot key. (Setting is available at OSD) User-defined Hot key. (Setting is available at OSD) User-defined Hot key. (Setting is available at OSD) Put the computer in standby mode. To turn the LCD display on again, press any key or TouchPad. (In Windows XP and Windows 2000, this comb
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Ch3. System information Status indicators · The system status indicators show the status of the computer. a de f g a b c e f d 14.1” 15” a. AC Power Power indicator lights up when the power cord is connected to the computer. b. Battery Battery status indicator indicates the following status of the battery. Green : The computer is connected to an AC adapter and is being charged. Off : The battery if fully charged OR the computer is not connected to an AC adapter. Blinking : The battery power is
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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.
