IBM T22, T21 manual FRU Tests, Following table shows the test for each FRU

Product overview

FRU Tests

The following table shows the test for each FRU.

FRU	Applicable test
System board	1.	Diagnostics --> CPU/Coprocessor
	2.	Diagnostics --> Systemboard
Power	Diagnostics --> Other Devices --> IBM AC
	Adapter, IBM Battery 1 (IBM Battery 2)
LCD unit	1.	Diagnostics --> Video Adapter
	2. Interactive Tests --> Video
Modem	1. Make sure the modem is set up correctly.
	2. Replace the modem jack and the modem
		card in turn, and run the following test in
		Diagnostics --> Communication:
		a. Lucent Modem (M2) Loopback
		b. Lucent Modem (M2) Dialtone/DTM
		c. Lucent Soft Modem Loopback (T23
			only)
		d. Lucent Soft Modem Dialtone (T23 only)
		e.	Intel Modem Register
		f.	Intel Modem Loopback/DTMF
		g. Intel SP Modem Register
		h. Intel SP Modem Loopback/DTMF
		i. 3Com MiniPCI Modem Test
		j. 3Com MiniPCI Dialtone Test
Audio	1. Interactive Tests --> Internal Speaker
	2. Diagnostics --> Other Devices --> Crystal
		SoundFusion™ Test
Speaker	Interactive Tests --> Internal Speaker
PC Card slots	Diagnostics --> Systemboard --> PCMCIA,
	PCMCIA External Loop
Keyboard	1.	Diagnostics --> Systemboard -->
		Keyboard
	2. Interactive Tests --> Keyboard
TrackPoint or	If the TrackPoint does not work, check the
pointing device	configuration in the ThinkPad Configuration
	program. If the TrackPoint is disabled, select
	Enable to enable it.
	After you use the TrackPoint, the pointer may
	drift on the screen for a short time. This drift
	can occur when a slight, steady pressure is
	applied to the TrackPoint pointer. This symptom
	is not a hardware problem. If the pointer stops
	after a short time, no service action is
	necessary.
	If enabling the TrackPoint does not correct the
	problem, continue with the following:
	v Interactive Tests --> Mouse
Hard-disk drive	Diagnostics --> Fixed Disks

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46ThinkPad T20, T21, T22, T23 (MT 2647/2648)