Lenovo ThinkPad 770X Hardware Maintenance Manual for 770 series notebooks(Janu - Page 49

Checking the Installed Devices List, Diagnostic Error Codes, Device ID

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RUNNING THE DIAGNOSTICS Checking the Installed Devices List If a device is installed but the icon appears in a gray shade rather than a dark shade on the basic diagnostics menu, the device is defective. If necessary, adjust the contrast control to clearly distinguish the shades of the icon. Reseat the device connectors. If the symptom remains, replace the device or the system board. If a device that is not installed appears in a dark shade (for example, FDD-2 appears in a dark shade when no second FDD is installed), do the following: 1. Replace the first device in the configuration, such as an FDD-1. 2. If the problem persists, replace the card that the device is connected to. The Parallel, and Serial icons are always displayed in a dark shade, because the icons represent subsystems of the system board and not the attachment of devices. The FDD-1 icon represents a device in the computer. The FDD-2 icon represents another device, such as: An external diskette drive attached to the computer An external diskette drive attached to a port replicator A diskette drive in a docking station Diagnostic Error Codes If an error is detected, the following appears: Large X on the left side of the device icon. Device ID (three digits). Error code (two digits). FRU code (four digits). The device ID and error code indicate the detailed portion of the FRU that caused the error. If replacing a FRU does not correct the problem, see the device ID or error code from the previous failure. If they have changed, the cause might be that the new FRU is defective or that the FRU was incorrectly installed. Device ID: If an error is detected by the diagnostic tests, a three-digit device ID is displayed, indicating the suspected device. General Descriptions 43

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RUNNING THE DIAGNOSTICS
Checking the Installed Devices List
If a device is installed but the icon appears in a gray shade
rather than a dark shade on the basic diagnostics menu,
the device is defective.
If necessary, adjust the contrast
control to clearly distinguish the shades of the icon.
Reseat the device connectors.
If the symptom remains,
replace the device or the system board.
If a device that is not installed appears in a dark shade (for
example, FDD-2 appears in a dark shade when
no
second
FDD is installed), do the following:
1.
Replace the
first
device in the configuration, such as
an FDD-1.
2.
If the problem persists, replace the card that the
device is connected to.
The Parallel, and Serial icons are always displayed in a
dark shade, because the icons represent subsystems of
the system board and not the attachment of devices.
The FDD-1 icon represents a device in the computer.
The
FDD-2 icon represents another device, such as:
±
An external diskette drive attached to the computer
±
An external diskette drive attached to a port replicator
±
A diskette drive in a docking station
Diagnostic Error Codes
If an error is detected, the following appears:
±
Large
X
on the left side of the device icon.
±
Device ID (three digits).
±
Error code (two digits).
±
FRU code (four digits).
The device ID and error code indicate the detailed portion
of the FRU that caused the error.
If replacing a FRU does
not correct the problem, see the device ID or error code
from the previous failure.
If they have changed, the cause
might be that the new FRU is defective or that the FRU
was incorrectly installed.
Device ID:
If an error is detected by the diagnostic
tests, a three-digit device ID is displayed, indicating the
suspected device.
General Descriptions
43