How to Deal with the Dark Screen of a Monitor After Restarting the System?
I. Check the terminal output equipment
Through the serial port remote terminal, log in to the server. Perform the following operations in the status of OK:
Check the following two lines in the output environmental parameters:
output-device screen, rsc-console screen
input-device keyboard, rsc-console keyboard
Remark: The preferred input and output equipment at starting is the monitor connected with the server.
2. OK power-off
Switch off the power supply, and remove the power plug and the serial port connection wire. Plug in and pull out the plugs of mouse, keyboard and monitor to ensure good contact. Plug in the power supply, restart the server. If dark screen still persists, operate as follows:
II. Modify the terminal output equipment
In the remote terminal mode, run the following commands to force the output as monitor.
OK setenv output-device screen
OK setenv input-device keyboard
Switch off the server, and remove the serial port wire. Plug in and pull out the plugs of mouse, keyboard and monitor, and at the same time check the key's position of the chassis panel to ensure that it is at the position of 12 o’clock.
After restarting, dark screen shall disappear. If it does not work, change for another monitor.
Generally, the reason is the incorrect setting of system environmental parameter and the connection failure of keyboard and mouse.