IBM N51 Series User Manual

Symptom/Error FRU/Action
Computer is functional, fan
runs, but power-good light
does not turn on.
1. LED Assembly
2. I/O Card
3. Go to “Power Systems
Checkout” on
page 346.
Intermittent failures. 1. Do the loop test.
(See “How to Run the
Loop Test” on
page 360.)
Cannot turn off Dock I. 1. I/O Card
2. Main Board
The LED (Dock I) for the
hard disk drive stays on.
1. 2.5-inch Hard Disk
Drive
2. The HDD Installation
Kit
LED (Dock I) for the hard
disk drive is not working, but
the Dock I is functional.
1. Check LED Assembly
Cable
2. LED Assembly
3. Main Board
4. I/O Card
Note: While related to the
SCSI hard disk
installed in the Dock
I, the LED for the
hard disk drive does
not work when you
access the SCSI
hard disk.
The beep sounds
continuously.
1. Before replacing any
devices, check that
the release/lock lever
is opened.
2. Security Feature Group
3. Main Board
The HDD-2 is not
recognized and no error
codes appear on the
screen. (The password of
the HDD-2 is still set.)
1. Remove the hard
disk password for the
ThinkPad hard disk
as follows:
a. Install the second
hard disk drive in
the computer.
b. Remove the hard
disk password.
Note: The HDD-2
icon means the
2.5-inch
ThinkPad hard
disk drive
installed in the
Dock I.
354 IBM Mobile Systems HMM - Volume 1

IBM N51 Series Specifications

General

Brand	IBM
Model	N51 Series
Category	Laptop
Language	English