1，开机时用diag
Select Task Selection－－select Identify and Attention Indicators－－When the list of LEDs displays, use the cursor to highlight Set System Attention Indicator to Normal－－Press Enter－－ press F7 to commit
2，未开机，上电OK状态下用串口和超级终端登上service processor
Select the System Information Menu－－Select LED Control Menu－－Select Clear System Attention Indicator
3，ibm书上说是#/usr/lpp/diagnostice/bin/usysfault -s normal，可这种方法我一次也没有试成功。
在关警告灯前想一想，为什么灯会亮。不要一上来就先灭灯。
