IBM R31, R30 manual MT 2656, 2657, 2676

Error	Message	Meanings	Comment
Code
0250	System battery	The CMOS clock	Replace the
	is dead Replace	battery indicator	CMOS battery
	and run SETUP	shows the	and Run Setup
		battery is dead.	to reconfigure
		Replace the	the system.
		battery and run
		Setup to
		reconfigure the
		system.
0251	System CMOS	System CMOS	Enter Setup to
	checksum	has been	configure the
	bad-default	corrupted or	system. If the
	configuration	modified	error persists,
		incorrectly,	check the
		perhaps by an	system battery.
		application
		program that
		changes data
		stored in CMOS.
		The BIOS
		installed Default
		Setup Values. If
		you do not want
		these values,
		enter Setup and
		enter your own
		values. If the
		error persists,
		check the system
		battery or contact
		your dealer.
0270	Real time clock	Real-Time Clock	The mainboard
	error	fails BIOS	may need the
		hardware test.	system date and
		May require	time.
		board repair.
0271	Check date and	BIOS found date	Enter Setup to
	time settings	or time out of	reconfigure the
		range and reset	system date and
		the Real-Time	time.
		Clock. May
		require setting
		legal date
		(1991–2099).

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