49
Indeterminate problems
· You are here because the diagnostic tests did not identify which adapter or device failed, wrong devices
are installed, a short circuit is suspected, or the system is inoperative.
Follow these procedures to isolate the failing FRU (do not isolate FRUs that have no defects).
· Verify that all attached devices are supported by the computer.
· Verify that the power supply being used at the time of the failure is operating correctly.
1. Power off the computer
2. Visually check each FRU for damage. Replace any damaged FRU.
3. Remove or disconnected all of the following devices :
a. Non-LG devices.
b. Printer, mouse, and other external devices.
c. Battery pack.
d. PC cards.
e. ODD (CD-ROM, Combo) drive or FDD drive in the Bay.
f. Hard-disk drive.
Note
Use the other memory card because it needs when operating computer.
4. Power on the computer.
5. Determine whether the problem has changed.
6. If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7. If the problem remains, replace the following FRUs one at a time.
(do not replace a non-defective FRU)
a. LCD assembly (Check external monitor whether the same problem recurs or not).
b. Keyboard.
c. Keydeck (TouchPad and Scroll Button assembly).
d. System board.
Ch4. Symptom-to-part index
Summary of Contents for LM40
Page 1: ...0 Service Manual LM40 50 LG Electronics ...
Page 16: ...15 Model Configuration Ch3 System information ...
Page 17: ...16 System Block Diagram Ch3 System information ...
Page 56: ...55 3 Disconnect the keyboard connector Ch5 Removing and replacing a part ...
Page 59: ...58 Ch5 Removing and replacing a part ...
Page 79: ...78 8 Hold M B with your both hand and pull it up to remove Ch5 Removing and replacing a part ...
Page 88: ...87 6 Remove LCD from the LCD rear panel Ch5 Removing and replacing a part ...
Page 107: ...MKD01 MKM33 MKM31 ODD MKM32 MKD04 MKM39 MKD03 106 ...
Page 109: ...108 MKC08 MKM08 MKM32 MKM30 MKM09 MKM10 MKM11 MKM32 MKM06 15 0 MKM07 14 1 MKM30 ...
Page 112: ...111 MKC06 MKM05 MKM30 MKM28 MKM33 MKM33 MKM33 MKM34 MKM33 MKM19 MKM30 MKC01 MKC11 MKC13 ...