System Supporting The Lenovo Diagnostics Programs - Lenovo ThinkPad T420si Hardware Maintenance Manual

Table 1. FRU tests
FRU
System board
Power
LCD unit
Audio
Speaker
Keyboard
Hard disk drive or solid state
drive
Diskette drive
Optical drive
Memory
TrackPoint or pointing
device
Touch Pad

System supporting the Lenovo diagnostics programs

The section provides information about ThinkPad computers that support the Lenovo diagnostics programs.
Some descriptions might not apply to your particular computer.
The Lenovo diagnostics programs include following:
• Lenovo Solution Center
• Quick test programs
• UEFI diagnostic program
• Bootable diagnostic programs
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Hardware Maintenance Manual
Applicable test
1. Diagnostics ➙ CPU/Coprocessor.
2. Diagnostics ➙ Systemboard.
3. If the docking station or the port replicator is attached to the ThinkPad Notebook,
detach it.
Diagnostics ➙ ThinkPad Devices ➙ AC Adapter, Battery 1 (Battery 2).
1. Diagnostics ➙ Video Adapter.
2. Interactive Tests ➙ Video.
Enter the ThinkPad Setup and change Serial ATA (SATA) setting to Compatibility, and
run Diagnostics ➙ Other Device ➙ Conexant Audio.
Interactive Tests ➙ Internal Speaker.
Note: Once Audio test is done, the no sound is heard this test. In this case, turn off
and turn on the computer. Then, run this test again.
1. Diagnostics ➙ Systemboard.
2. Interactive Tests ➙ Keyboard.
Enter the ThinkPad Setup and change Serial ATA (SATA) setting to Compatibility, and
run Diagnostics ➙ Fixed Disks.
1. Diagnostics ➙ Diskette Drives.
2. Interactive Tests ➙ Diskette.
1. Diagnostics ➙ Other Devices ➙ Optical Drive.
2. Interactive Tests ➙ Optical Drive Test.
1. If two DIMMs are installed, remove one of them and run Diagnostics ➙ System
Memory.
2. If the problem does not recur, return the DIMM to its place, remove the other one,
and run the test again.
If the TrackPoint does not work, check the configuration as specified in the ThinkPad
Setup. If the Trackpoint is disabled, select Automatic 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:
• Interactive Tests ➙ Mouse.
If the Touch Pad does not work, check the configuration as specified in the ThinkPad
Setup. If the Touch Pad is disabled, select Automatic to enable it. If enabling the
Touch Pad does not correct the problem, continue with the following:
• Interactive Tests ➙ Mouse.