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Acer Aspire 4750Z Acer Aspire 4350, 4750, 4750G, 4750Z Service Guide - Page 65

Remove the one screw A securing the main board in place.

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14. Remove the one screw (A) securing the main board in place. Size (Quantity) M2.5 x L6 (1) Color Black Torque 3.0 kgf-cm Part No. 86.00E12.536 15. Carefully lift the main board and disconnect the DC-in cable from the main board. Chapter 3 57

Section	Page
System Specifications	9
Features	9
System Block Diagram	12
Your Acer Notebook tour	13
Top view	13
Hotkeys	14
Closed front view	15
Rear view	15
Left view	15
Right view	17
Base view	17
Hardware Specifications and Configurations	19
System Utilities	27
BIOS Setup Utility	27
Navigating the BIOS Utility	28
Information	29
Main	30
Security	32
Boot	36
Exit	37
BIOS Flash Utility	38
Remove HDD Password	39
Machine Disassembly and Replacement	41
Disassembly Requirements	41
General Information	42
Pre-disassembly Instructions	42
Disassembly Process	42
External Module Disassembly Process	43
External Modules Disassembly Flowchart	43
Removing the Battery Pack	44
Removing the Optical Drive Module	45
Removing the Back Cover	46
Removing the Hard Disk Drive Module	47
Removing the Wireless LAN Card	48
Removing the DIMM Module	50
Main Unit Disassembly Process	51
Main Unit Disassembly Flowchart	51
Removing the Keyboard	52
Separating the Upper Case from the Lower Case	53
Removing the Touchpad Boards	55
Removing the Left and Right Speakers	57
Removing the Power Button Board	59
Removing the Bluetooth Module	60
Removing the RTC Battery	61
Removing the USB Board	62
Removing the Main Board	63
Removing the Heatsink Module	66
Removing the CPU	68
Removing the LCD Module	69
LCD Module Disassembly Process	72
LCD Module Disassembly Flowchart	72
Removing the LCD Bezel	73
Removing the LCD panel with the Brackets	74
Removing the LCD Brackets	78
Removing the FPC Cable	79
Removing the Web Camera	80
Removing the Microphone	82
Removing the Antennas	82
Troubleshooting	85
System Check Procedures	86
External Diskette Drive Check	86
External Optical Disk Drive Check	86
Keyboard or Auxiliary Input Device Check	86
Memory Check	87
Power System Check	87
Touchpad Check	88
Power-On Self-Test (POST) Error Message	88
Index of Error Messages	89
Phoenix BIOS Beep Codes	93
Index of Symptom-to-FRU Error Message	97
Intermittent Problems	100
Undetermined Problems	100
Connector Locations	101
Main Board	101
Clearing Password Check and BIOS Recovery	104
Clearing Password Check	104
BIOS Recovery by Crisis Disk	105
FRU (Field Replaceable Unit) List	107
Exploded Diagram	108
Model Definition and Configuration	121
Aspire 4750/4750G Series	122
Hardware Device Tests	144
Online Support Information	147

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