http://intel.ly/2jZZakZ
P.34
AVR54. System May Experience Inability to Boot or May Cease Operation
Problem: The SoC LPC_CLKOUT0 and/or LPC_CLKOUT1 signals (Low Pin Count bus
clock outputs) may stop functioning.
Implication: If the LPC clock(s) stop functioning the system will no longer
be able to boot.
Workaround: A platform level change has been identified and may be
implemented as a workaround for this erratum.
Status: For the steppings affected, see Table 1, “Errata Summary Table” on
page 9.
简单说是 CPU 某几个讯号可能出包，导致系统无法开机
而且没办法靠 Microcode / BIOS 更新解决，只能更换硬件。
Cisco 的公告比较详细
http://bit.ly/2jZVHTm 预估使用18个月后, 有较高机率开始出现这情况,
也有提供有问题和正常的 revision 编号
如果机器在 2016/11/16 时还有保固，未来会帮你维修,
http://bit.ly/2jZUr2E 群辉只发声明说正在调查，机器有问题的人可以提出RMA申请