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Lenovo ThinkPad Edge L330 Hardware Maintenance Manual - ThinkPad Edge L330 - Page 73

Backup battery, 1080 Keyboard, Ensure that the connector is attached ﬁrmly.

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1070 Backup battery 1070 Backup batery For access, remove these FRUs in order: • "1010 Battery pack" on page 56 • "1020 Bottom cover" on page 57 Removal steps of backup battery DANGER Use only the authorized battery specified for your computer. Any other battery could ignite or explode. 1 2 When installing: Ensure that the connector is attached firmly. 1080 Keyboard For access, remove these FRUs in order: • "1010 Battery pack" on page 56 • "1020 Bottom cover" on page 57 Chapter 9. Removing or replacing a FRU 67

Section	Page
About this manual	5
Chapter 1. Safety information	7
General safety	7
Electrical safety	7
Safety inspection guide	9
Handling devices that are sensitive to electrostatic discharge	9
Grounding requirements	10
Safety notices (multilingual translations)	10
Chapter 2. Important service information	25
Strategy for replacing FRUs	25
Strategy for replacing a hard disk drive	26
Important notice for replacing a system board	26
How to use error codes	26
Strategy for replacing FRUs for CTO, CMV, and GAV products	26
Product definition	26
FRU identification for CTO, CMV, and GAV products	27
Chapter 3. General checkout	29
What to do first	29
Checkout guide	30
Lenovo Solution Center	30
Quick test programs	30
UEFI diagnostic program	31
Bootable diagnostic programs	31
Power system checkout	32
Checking the ac power adapter	32
Checking operational charging	33
Checking the battery pack	33
Checking the backup battery	33
Chapter 4. Related service information	35
Restoring the factory contents by using Product Recovery discs	35
Restoring the factory contents using the recovery disc set	35
Passwords	37
Power-on password	37
Hard disk password	37
Supervisor password	37
How to remove the power-on password	37
How to remove the hard disk password	38
Power management	38
Screen blank mode	38
Sleep mode	39
Hibernation mode	39
Symptom-to-FRU index	40
Numeric error codes	40
Error messages	41
No-beep symptoms	41
LCD-related symptoms	41
Intermittent problems	42
Undetermined problems	42
Chapter 5. Status indicators	45
Chapter 6. Fn key combination	47
Chapter 7. Locations	49
Locating computer controls, connectors, and indicators	49
Front view	49
Rear view	50
Bottom view	50
Locating FRUs and CRUs	50
Major FRUs and CRUs	52
LCD FRUs and CRUs	54
Looking up FRU information	55
Chapter 8. FRU replacement notices	57
Screw notices	57
Retaining serial numbers	58
Restoring the serial number of the system unit	58
Retaining the UUID	59
Reading or writing the ECA information	59
Chapter 9. Removing or replacing a FRU	61
General guidelines	61
Before servicing your computer	62
1010 Battery pack	62
1020 Bottom cover	63
1030 Memory modules	64
1040 Hard disk drive or solid-state drive	65
1050 PCI Express Mini Card for wireless LAN	67
1060 PCI Express Half Mini Card for wireless WAN or mSATA solid-state drive	69
1070 Backup battery	73
1080 Keyboard	73
1090 Keyboard bezel assembly and power button sub card	76
1100 Thermal fan assembly	78
1110 Microprocessor	80
1120 System board assembly and VGA sub card	81
1130 Speaker assembly	84
1140 LCD unit, DC-in cable, and base cover assembly	85
2010 LCD bezel assembly	90
2020 LCD panel and hinges	91
2030 Integrated camera	93
2040 Microphone	94
2050 LCD cable assembly	95
2060 Wireless antenna assembly and LCD rear cover assembly	96
Appendix A. Notices	99