When the HP server is turned on, there will be a self-test sequence, first the CPU and memory, and then the ILO management chip (f8 here). In the afternoon, the matrix card is generally E200 (there will be red letters and F8 options on the screen), then the network card, and then three options F9 F 10 F 12 will appear on the screen. Be careful not to press F8. When you start to press here, you can enter safe mode.