IBM T21, T22 manual Dimm

		Symptom-to-FRU index
Symptom or error	FRU or action, in sequence
0232	1.	DIMM.
Extended RAM	2.	System board.
error—Extended RAM fails at
offset nnnn.
0250	Replace the backup battery
System battery error—System	and run IBM BIOS Setup
battery is dead.	Utility to reset the time and
	date.
0251	Replace the backup battery
System CMOS checksum	and run IBM BIOS Setup
bad—Default configuration	Utility to reset the time and
used.	date.
0252	Reset the password by
Password checksum bad—The	running IBM BIOS Setup
password is cleared.	Utility.
0260	1.	Replace the backup
System timer error		battery and run IBM BIOS
		Setup Utility to reset the
		time and date.
	2.	System board.
0270	1.	Replace the backup
Real time clock error		battery and run IBM BIOS
		Setup Utility to reset the
		time and date.
	2.	System board.
0271	Run IBM BIOS Setup Utility to
Date and time error—Neither	reset the time and date.
the date nor the time is set in
the computer.
02B2	1.	Diskette drive.
Incorrect drive A type	2.	External FDD cable.
	3.	I/O card.
02F4	1.	Load Setup Defaults in
EISA CMOS not writable		IBM BIOS Setup Utility.
	2.	Replace the backup battery.
	3.	System board.
02F5	1.	DIMM.
DMA test failed	2.	System board.
02F6	1.	DIMM.
Software NMI failed	2.	System board.
02F7	1.	DIMM.
Fail-safe timer NMI failed	2.	System board.

ThinkPad T20, T21, T22 and T23 series 51