Contents

About this manual	iii
Chapter 1. Safety information	1
General safety	1
Electrical safety	2
Safety inspection guide	3
Handling devices that are sensitive to electrostatic
discharge	3
Grounding requirements	4
Safety notices (multilingual translations)	4
Laser compliance statement (multilingual
translations)	19
Chapter 2. Important service
information	27
Strategy for replacing FRUs	27
Strategy for replacing a hard disk drive . . .	28
Important notice for replacing a system
board	28
Important information about replacing RoHS
compliant FRUs	28
Chapter 3. General checkout	29
What to do first	29
Power system checkout	30
Checking the ac power adapter	30
Checking operational charging	31
Checking the battery pack	31
Chapter 4. Related service
information	33
Recovering the computer settings	33
Passwords	33
Power-on password	33
Supervisor password	33
Power management	34
Screen blank mode	34
Sleep mode	34
Hibernation mode	34
Chapter 5. Lenovo E49 and ZhaoYang
E49	37
Specifications	37
Status indicators	38
Fn key combinations	39

Chapter 6. FRU replacement
notices		41
Screw notices		41
Chapter 7. Removing and replacing a
FRU		43
General guidelines		43
1010	Battery pack	44
1020	Optical drive	44
1030	Bottom slot cover	46
1040	Memory modules	46
1050	Hard disk drive assembly	47
1060	PCI Express Mini Card for wireless LAN . .	49
1070	Thermal fan assembly	51
1080	Microprocessor	53
1090	Keyboard	54
1100	Keyboard bezel	57
1110	Power board	59
1120	Backup battery	60
1130	System board assembly	61
1140	LCD unit	62
1150	DC-in cable and base cover	65
2010	LCD front bezel	67
2020	Integrated camera	69
2030	LCD panel, LCD cable, and hinges . . . .	69
2040	Antenna assembly and LCD rear cover . . .	71
Chapter 8. Locations		73
Front view		73
Right-side view		74
Rear view		74
Bottom and left-side view		75
Chapter 9. Parts list		77
Overall		78
LCD FRUs		81
Keyboard		83
Miscellaneous parts		83
ac power adapters		83
Power cords		84
Appendix A. Notices		89
Electronic emissions notices		90
Trademarks		90

Lenovo E49 manual Contents