Sun Microsystems 220R manual The following table provides error code definitions

The following table provides error code definitions.

Caps Lock	Compose	Scroll Lock	Num Lock	Failing FRU
On	Off	Off	Off	Main logic board
Off	On	Off	Off	CPU module 0
Off	On	On	Off	CPU module 1
On	Off	Off	On	No memory detected
On	On	On	On	Memory bank 0
On	On	Off	On	Memory bank 1
On	On	On	Off	Memory bank 2
On	On	On	On	Memory bank 3
Off	Off	Off	On	NVRAM

Note –The Caps Lock LED blinks on and off to indicate that the POST diagnostics are running; all other keys are off. When the LED lights steadily, it indicates an error.

140 Sun Enterprise 220R Server Owner’s Guide • October 1999