PDF Service Manual LG LS70 Electronics - 2 MB
This is the official electronics service manual for the LG LS70 model.
It provides technicians with circuit diagrams, troubleshooting flowcharts, and detailed repair instructions.
Use this guide to accurately diagnose and fix electronic issues.
This manual is essential for any repair shop or individual servicing LG electronics.
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Service Manual
(LS70)
LG Electronics
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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 selected an
incorrect drive, data or programs might be overwritten.
· Replace FRUs only for the correct mode.
· When you replace a FRU, make sure the model of the machine and the FRU part number are correct by
referring to the FRU parts list.
· A FRU should not be replaced because of a single, irreproducible failure. Single failures can occur for a
variety of reasons that have nothing to do with a hard ware defect, such as cosmic radiation,
electrostatic discharge, or software errors.
· Consider replacing a FRU only when a problem recurs. If you suspect that a FRU is defective, clear the
error log and run the test again. If the error does not recur, do not replace the FRU.
· Be careful not to replace a non-defective FRU.
What to do first
You must fill out the record form first.
During the warranty period, the customer may be responsible for repair costs if the computer damage was
caused by misuse, accident, modification, unsuitable physical or operating environment, or improper
maintenance by the customer. The following list provides some common items that are not covered under
warranty and some symptoms that might indicate that the system was subjected to stress beyond normal
use. Before checking problems with computer, determine whether the damage is covered under the
warranty by referring to the following :
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Ch3. System information
8. After the completion, ‘System BIOS was successfully updated’ appears on the screen, then the
computer restarts.
9. After the restart, make sure the system BIOS is updated.
10. If your computer does not restart automatically, turn off your computer and then turn it back on by
pressing power button.
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Ch4. Symptom-to-part index
Numeric error codes
Symptom / Error FRU or action, in sequence
0200 1.Reset the hard-disk drive.
Fixed disk failure 2.Load Setup Defaults in BIOS Setup Utility.
(The hard disk is not working) 3.Hard-disk drive.
4.System board.
0210 1.Check the keyboard if it is pressed.
Stuck Key error 2.Replace the keyboard.
0211 Run interactive tests of the keyboard and the auxiliary
Keyboard error input device.
0212 System board.
Keyboard Controller Failed
0220 Load Setup Defaults in BIOS Setup Utility.
Monitor type error - Monitor type does not
match the one specified in CMOS.
0230 1.DIMM
System RAM error - System RAM Failed at 2.System board
offset.
0231 System board
Shadow RAM error - Shadow RAM failed at
offset
0232 1. DIMM
Extended RAM error - Extended RAM Failed 2. System board
at address line
0250 Replace the backup battery and run BIOS Setup Utility
System battery error – System battery is dead to reset the time and date.
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Ch5. Removing and replacing a part
■ 1040 Keyboard
Remove the following parts in order before replacing this part
1. Battery Pack(1010) 2. Hard Disk Drive(1020) 3. W/L LAN Card(1030)
1. Remove 2 screws.
No. FRU No. Specification Qty
1 1SZZBA4097A M2.5 X L6.5 2
2. To remove 3 hooks, insert a (-) type screwdriver into a hook located at the lower end of keyboard,
and pull it up.
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Ch5. Removing and replacing a part
3. Remove 4 screws from Key Deck. Disconnect TouchPad cable and speaker cable.
No. FRU No. Specification Qty
1 1SZZBZ4014A M2.0 X L5.0 4
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Ch5. Removing and replacing a part
2. Disassemble the LCD front. The front hook located on the middle of LCD upper and lower end.
Be careful of the direction when removing because it is connected from inside out.
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Ch6. Part lists
Location Part Number Specification Remarks
HFM19 3850BZ9A87B ATI Label, X600 128M ATI LABEL
HFM20 3850BF4304A POP LABEL LS70 PM IPS FOR DOMESTIC POP LABEL
HFM20 3850BF4305A POP LABEL LS70 PM SXGA+ FOR DOMESTIC POP LABEL
HFM20 3850BF4306A POP LABEL LS70 PM GLARE FOR DOMESTIC POP LABEL
HFM20 3850BF4307A POP LABEL LS70 PM XGA FOR DOMESTIC POP LABEL
HFM20 3850BF4308A POP LABEL LS70 GM FOR DOMESTIC POP LABEL
HFM20 3850BF4304B POP LABEL LS70 PM IPS FOR EXPORT POP LABEL
HFM20 3850BF4305B POP LABEL LS70 PM SXGA+ FOR EXPORT POP LABEL
HFM20 3850BF4306B POP LABEL LS70 PM GLARE FOR EXPORT POP LABEL
HFM20 3850BF4307B POP LABEL LS70 PM XGA FOR EXPORT POP LABEL
HFM20 3850BF4308B POP LABEL LS70 GM FOR EXPORT POP LABEL
HFM21 3850BB4482A ID LABEL for Domestic Made in Korea ID LABEL
HFM21 3850BB4483A ID LABEL for Export Made in Korea ID LABEL
HFM21 3850BB4484A ID LABEL for Export Made in China ID LABEL
HFM22 1SZZBA4017A screw M2.0 * L3.0 SCREW A
HFM23 1SZZBA4023A screw M2.0 * L3.5 SCREW B
HFM24 1SZZBZ4014A screw M2.0 * L5.0 SCREW C
HFM25 1SZZBZ4020A screw M2.0 * L10 (Thermal block fix) SCREW D
HFM26 1SZZBA4097A screw M2.5 * L6.5 SCREW E
HFM27 1SZZBA4039B screw M2.5 * L8.0 (hinge) SCREW F
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