IBM 704 manual Nvram Data is invalid because Nvram was cleared

POST Error Messages

POST Message	Description
0816	A conflict occurred with the Serial Port 1 Resource.
	Action: Start the System Configuration Utility and check for
	conflicts. If the problem recurs, have the system
	serviced.
0817	A conflict occurred with the Serial Port 2 Resource.
	Action: Start the System Configuration Utility and check for
	conflicts. If the problem recurs, have the system
	serviced.
0820	The expansion board in Slot n was disabled.
	Action: Start the System Configuration Utility and check for
	conflicts. If the problem recurs, have the system
	serviced.
0900	NVRAM Checksum Error occurred because NVRAM was
	cleared.
	Action:
	Ÿ If you have just replaced the real-time clock on the
	system board, start the Setup program to set the
	correct date and time. If the problem recurs, have
	the system serviced.
	Ÿ If you have not just removed or replaced the
	real-time clock, have the system serviced.
0903	NVRAM Data is invalid because NVRAM was cleared.
	Action:
	Ÿ If you have just replaced the real-time clock on the
	system board, start the Setup program to set the
	correct date and time. If the problem recurs, have
	the system serviced.
	Ÿ If you have not just removed or replaced the
	real-time clock, have the system serviced.
0905	NVRAM was cleared by resetting the system-board

configuration switch S6A1-1. Action:

Ÿ If you have just reset the configuration switch S6A1-1 on the system board, start the Setup program to set the correct date and time. If the problem recurs, have the system serviced.

Ÿ If you have not just removed or replaced the real-time clock, have the system serviced.

Chapter 5. Solving Problems 241