1. Check that the keyboard works properly, and you do not press ~ or Delete.
2. Check that no jumper cap is on the third pair of jumpers from right to left of the position shown in Figure 1.
Figure 1 Jumper position
Jumper caps are used for switchover between the system serial port and the management serial port. When jumper caps are installed, the DB9 serial port connector serves as a BMC management serial port. When jumper caps are removed, the DB9 serial port connector serves as a system serial port, and the RH2285 has a peripheral that sends serial port data to the RH2285, as shown in Figure 2.
Figure 2 Serial port position
When the "Remote Access" for serial port redirection is enabled in the BIOS, the peripheral connected to the DB9 serial port connector sends serial port data to the RH2285. The RH2285/E6000 serial port program has only the sending and receiving functions. An external serial port device can constantly send data. After a serial port is initialized in the BIOS, the serial port captures the ASCII code of the Delete key. Then the system determines that someone presses Delete, and the BIOS setting program is displayed. In this case, when the power on self-test (POST) is complete, the BIOS setup interface is automatically displayed.