IBM Eserver xSeries 360 Type 8686, User Reference Manual

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IBM® xSeries 360: User’s Reference
• The keyboard cable is connected correctly to the keyboard and to the
correct connector on the server.
Running the diagnostic tests can isolate the server component that failed, but
you must have the system serviced. If the error code remains, call for service.
Note: If you just connected a new mouse or other pointing device, turn off
the server and disconnect that device. Wait at least 5 seconds; then,
turn on the server. If the error code does not occur, replace the
device.
One long and one short beep
POST encountered an error in the video controller. Call for service.
One long and two short beeps
The video I/O adapter ROM is not readable, or the video subsystem is
defective. This beep combination might also indicate that the system board
contains a failing component.
One long and three short beeps
The video subsystem has not detected a monitor connection to the server.
Ensure that the monitor is connected to the server. If the problem remains,
replace the monitor.