这个是服务器主板，提示意思是系统初始化 ，91是自检代码，把加装的板块都拆掉，只保留一根内存，最小系统开机看看。
视频输出方式错误，拔电源，扣电池，几分钟后开机试试。Had this problem when the video output was to "UEFI" in BIOS. Resetting the BIOS to defaults (by removing power and the CMOS battery) fixed it by reverting the BIOS video output to "Legacy".
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