Lenovo H4 Series Hardware Maintenance Manual V2.0
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... the hard disk drive 45 Replacing an optical drive 46 Replacing a PCIE adapter 47 Replacing the heatsink assembly 48 Replacing the CPU 50 Replacing the motherboard 53 Replacing the system fan assembly 54 Replacing the power supply 56 Replacing the keyboard 57 Replacing the mouse 58 Replacing the external speaker 59... disk drive boot error 28 Power Supply Problems 29 Beep symptoms 30 POST error codes 31 Undetermined problems 33 Chapter 8. Statement 63 ii Hardware Maintenance Manual Exiting from the Setup Utility program 27 Chapter 7.
... the hard disk drive 45 Replacing an optical drive 46 Replacing a PCIE adapter 47 Replacing the heatsink assembly 48 Replacing the CPU 50 Replacing the motherboard 53 Replacing the system fan assembly 54 Replacing the power supply 56 Replacing the keyboard 57 Replacing the mouse 58 Replacing the external speaker 59... disk drive boot error 28 Power Supply Problems 29 Beep symptoms 30 POST error codes 31 Undetermined problems 33 Chapter 8. Statement 63 ii Hardware Maintenance Manual Exiting from the Setup Utility program 27 Chapter 7.
Lenovo H4 Series Hardware Maintenance Manual V2.0
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...system 8042 Gate A20 test error (cannot manufacturer's technical support. Before declaring the motherboard beyond all other expansion cards 6 beeps are absent, consult your system manufacturer. Hardware Maintenance Manual Beep symptoms Beep symptoms are tones or a series of tones separated by a ...-in base memory (first 64KB block) 3 beeps Base memory read/write test error 4 beeps Fatal error indicating a serious Motherboard timer not operational problem with the system. The following tables describes beep symptoms. Beep Symptom 1 beep Memory refresh timer error...
...system 8042 Gate A20 test error (cannot manufacturer's technical support. Before declaring the motherboard beyond all other expansion cards 6 beeps are absent, consult your system manufacturer. Hardware Maintenance Manual Beep symptoms Beep symptoms are tones or a series of tones separated by a ...-in base memory (first 64KB block) 3 beeps Base memory read/write test error 4 beeps Fatal error indicating a serious Motherboard timer not operational problem with the system. The following tables describes beep symptoms. Beep Symptom 1 beep Memory refresh timer error...
Lenovo H4 Series Hardware Maintenance Manual V2.0
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Hardware Maintenance Manual Voltage selection switch (selected models only) Power connector PS/2 keyboard connector PS/2 mouse connector HDMI connector (selected models only) On-board VGA connector (selected models ... computer. It provides basic computer functions and supports a variety of below system boards was preinstalled on the system board The system board (sometimes called the motherboard) is the main circuit board in your computer.). 38
Hardware Maintenance Manual Voltage selection switch (selected models only) Power connector PS/2 keyboard connector PS/2 mouse connector HDMI connector (selected models only) On-board VGA connector (selected models ... computer. It provides basic computer functions and supports a variety of below system boards was preinstalled on the system board The system board (sometimes called the motherboard) is the main circuit board in your computer.). 38
Lenovo H4 Series Hardware Maintenance Manual V2.0
Page 56
... obtain copies of the chassis. 9. Align then insert the new motherboard and screw it in the Hardware Maintenance Manual (HMM) for the computer. Install all cables to the "Completing the installation". Refer to "Removing the computer cover". 2. Locate the system fan assembly. Refer... of the Safety and Warranty Guide or HMM, go to the Support Web site at: http://consumersupport.lenovo.com To replace the system fan assembly: 1. Refer to the new motherboard. 11. Replacing the system fan assembly Attention Do not remove the computer cover or attempt any repairs before reading the "...
... obtain copies of the chassis. 9. Align then insert the new motherboard and screw it in the Hardware Maintenance Manual (HMM) for the computer. Install all cables to the "Completing the installation". Refer to "Removing the computer cover". 2. Locate the system fan assembly. Refer... of the Safety and Warranty Guide or HMM, go to the Support Web site at: http://consumersupport.lenovo.com To replace the system fan assembly: 1. Refer to the new motherboard. 11. Replacing the system fan assembly Attention Do not remove the computer cover or attempt any repairs before reading the "...