LG Electronics LS70 service manual Ch4. Symptom-to-part index LCD-related symptoms

Page 35

Ch4. Symptom-to-part index

LCD-related symptoms

Note

Before removing or disassembling LCD, power off the computer, unplug all power cords from electrical outlets, remove the battery pack also.

Symptom / Error		FRU or action, in sequence

LCD screen becomes dark suddenly.	Check out Battery Miser.

Nothing displayed on LCD screen.	1.	Check out Battery Miser.
	2.	Choose Never in the Turn off Monitor item on
		Power Options Properties.
	3.	Check the power save mode switch if it is pressed
		by something.
	4.	Check the System is in standby or hibernation
		mode.

LCD backlight not working.	1.	Reconnect inverter to the board connector.
LCD too dark.	2.	Replace inverter.
LCD brightness cannot be adjusted.	3.	LCD assembly.
	4.	System board.

LCD color cannot be adjusted.	1.	Reset all LCD connectors.
LCD screen abnormal.	2.	Replace LCD cable.
Characters missing pixels.	3.	LCD assembly.
LCD screen unreadable.	4.	System board.
Wrong color displayed.

Horizontal or vertical lines displayed	LCD assembly.
on LCD

Power-on indicator on, and a blank\LCD	LCD assembly.
during POST.	System board.

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Contents LS70 LG Electronics Page „ Strategy for replacing a hard-disk drive Ch1. Service informationBefore replacing parts 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 Backup Standby RTC battery safety information Ch1. Service information Laser compliance statementImportant Notes Ch1. Service information Read this first„ What to do first Followings are not covered under warranty „ Front view Ch2. LocationsSecurity key hole Kensington Lock Ch2. Locations „ Rear view„ Left view „ Right viewCh3. System information „ SpecificationCh3. System information „ System Block Diagram Ch3. System information „ Fn key combinations System status indicators show the status of the computer Ch3. System information „ Status indicatorsCh3. 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 „ Using the keys Ch3. System information „ Main menu „ Security menu Ch3. System information „ Advanced menu„ Exit menu Ch3. System information „ Boot menu„ Power system checkout Ch4. Symptom-to-part indexCh4. Symptom-to-part index Ch4. Symptom-to-part index Terminal Voltage V dc Ground Symptom / Error FRU or action, in sequence Ch4. Symptom-to-part index „ Numeric error codesDMA 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 Ch5. Removing and replacing a part Removing and replacing a part FRUCh5. Removing and replacing a part Battery Pack Ch5. Removing and replacing a part Hard Disk Drive Ch5. Removing and replacing a part Wireless LAN Card 1SZZBA4097A Ch5. Removing and replacing a part KeyboardDisconnect Keyboard Connector and remove Keyboard Ch5. Removing and replacing a part Retainer Disconnect Retainer Connector and remove Retainer Ch5. Removing and replacing a part Keyboard Plate Ch5. Removing and replacing a part FAN Assembly Ch5. Removing and replacing a part Hinge Cover Ch5. Removing and replacing a part Display Module Remove Display Module Ch5. Removing and replacing a part 110 0 Key Deck 1SZZBZ4014A Ch5. Removing and replacing a part Optical Disk Drive Ch5. Removing and replacing a part Audio Board Ch5. Removing and replacing a part HDD Cover Block L Ch5. Removing and replacing a part Hinge Frame L Ch5. Removing and replacing a part Main Board Ch5. Removing and replacing a part Ch5. Removing and replacing a part Ch5. Removing and replacing a part Video Board 1SZZBA4080F Ch5. Removing and replacing a part 1SZZBZ3002W Ch5. Removing and replacing a part 1SZZBA4017A Ch6. Part lists Part lists400MHZ DDR2 Sdram with 32MX16 NMEM1 Common Bezel for Bran NB-PC HTA05 HFC07 Oversea EXPORT, Slim Type HFC11 HFD03 HFM20 HUNTER-FULL 15 Inch Cover Rear Assy Exploded ViewExploded View DAC-08B072 Delta Inverter KUBNKM095A Alps InverterDAC-08B073 Delta HUNTER-TL 15 Inch OZ1060S KUBNKM094A Alps InverterExploded View PLATE, Display Rear Hunter 150 Full ISP Style B WVAISP Style B WVA P3 Plant WVA ISP Style BCase Assy, Front Exploded View 32MX64 533MHZ DDR2 Sdram with 32MX16 HYS64T32000HDL-5-A Infineon 200P Sodimm BKDDR2 Sdram with 32MX16 64MX64 400MHZ DDR2 Sdram with 32MX16HUNTER-FULL 15 Inch Hinge Frame Assy Right RH80536GE0362M LG Intel 478P Ufcpga Tray NT CPU PENTIUM-MN HUNTER-FULL 15 Inch Bottom Case Assy 150F HUNTER-FULL 15 Inch MG Hinge ,FRAME LeftExploded View MHT2060AT PL Fujitsu 60GB Eide Inner ZEBRA/MCKINLEY/K2 HUNTER-WIDE 15.4 Inch HDD SUS 17.1W, 15FMHT2040AT PL Fujitsu 40GB Eide Inner ZEBRA/MACKINLEY/K2 HTS424040M9AT00 Hgst 40GB Eide Inner Mckinly 4200RPMHUNTER-WIDE 15.4 Inch Pcabs HDD Block FAN AssemblyExploded View POP Label LS70 PM IPS for Domestic HUNTER-FULL 15 Inch KBD Deck Total AssyHUNTER-FULL Plate KBD Assy Centrino Label NT 252352-002 IntelHUNTER-WIDE 15.4 Inch Pcabs KBD Deck BUTTON, Touchpad HUNTER-FULL 15 Inch Speaker Total AssyExploded View Russian Hunter F OKI 86KEY HUNTER-F LG-IBM OKI Korea KEYHUNTER-F LG-IBM OKI English KEY Taiwan Hunter F OKI 87KEYExploded View 4800MAH 3S-2P LGC LI-ION Cylinderical HUNTER-ALL Cell LGC SP-502B+H05VV-F+IS-034 I-SHENG SAA 1830MM 3PIN CONN. Black PF8B1CIJ10A-060 Longwell Gost 1830MM 3PIN CONN. BlackSP-022+IS-034+H05VV-F3G I-SHENG Gost 1800MM 3P CONN. Black PL8B1S3J10A-060 Longwell SAA 1830MM 3PIN Conn BlackID Label Hunter 15T China from Lgeks ID Label Hunter 15T Lgeks Made in ChinaID Label Hunter 15T China from Lgept Exploded View Screw M2.5 * L8.0 hinge