服务器型号：dell R730 机架式服务器

故障：

dell R730服务器开不了机，屏幕没有显示，日志报错信息如下：

CPU 1 M01 VPP PG voltage is outside of range

The chassis is open while the power is off

The system board fail-safe voltage is outside of range

CPU 1 M01 VPP PG voltage is outside of range

后更换了服务器主板显示正常。