1, the main engine rotates normally. If the monitor is not turned on, there are several possibilities. There may be a problem with the straight line between the host and the monitor.

2. There may be something wrong with the monitor. If the digital on-off key of the host can be turned on and off, it means that there is no big problem on the host side, and the output port is mainly checked.

3. Check the video card and monitor. If the indicator does not light up, please check the problem on the memory side of the motherboard.