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5.2 Resolving Other Problems ....................................................................................................................... 122
5.2.1 Monitor display problems ................................................................................................................. 122
5.2.2 Wavy lines on the screen ................................................................................................................... 122
5.2.3 Clearing system configuration .......................................................................................................... 122
5.2.4 Replacing the system board battery .................................................................................................. 123
Appendix A CentOS 7.5 Installation Guide ....................................................................................................... 124
1. Introduction ................................................................................................................................................ 124
1.1 System Requirements ........................................................................................................................... 124
2. Installing CentOS ....................................................................................................................................... 125
2.1 Installing CentOS via Installation Media ............................................................................................. 125
2.2 Installing CentOS via PXE ................................................................................................................... 129
3. Activating Management Ethernet .............................................................................................................. 134
4. GNOME Desktop Support (Optional) ....................................................................................................... 135
5. Building CentOS Kernel ............................................................................................................................ 136
5.1 Setting up Native CentOS Development Environment ........................................................................ 136
5.2 Building Ampere Computing CentOS Kernel ..................................................................................... 136
6. Ampere Computing CentOS RAS/APEI Support ...................................................................................... 138
7. CentOS AHCI Platform Boot Failure Recovery ........................................................................................ 139
8. KVM Support ............................................................................................................................................. 140
Appendix B HR330A OEM Command Specification ....................................................................................... 141
1. Introduction ................................................................................................................................................ 141
2. HR330A OEM Commands ........................................................................................................................ 142
2.1 Load UEFI default setting .................................................................................................................... 142
2.2 Clear or un-clear the UEFI password ................................................................................................... 142
2.3 Set or un-set the UEFI manufacturing mode (Deprecated) .................................................................. 143
2.4 Hide or un-hide the UEFI menu ........................................................................................................... 144
2.5 Get the UEFI control FLAG................................................................................................................. 144
2.6 MUX Switching command................................................................................................................... 145
2.7 Get MUX Configuration ...................................................................................................................... 146
2.8 Restore default Configuration .............................................................................................................. 146
2.9 Write BMC MAC Address to FRU ...................................................................................................... 147
2.10 Notify BMC backup component (Deprecated) .................................................................................. 148
2.11 Select rollback component ................................................................................................................. 148
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