IBM ThinkPad 380, Hardware Maintenance Manual

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the symptom remains, replace the device or the system
board. If needed, adjust the contrast control to clearly
distinguish the shades of the icon.
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 remains, replace the system board.
The parallel, and serial icons are always displayed in a
dark shade, because the icons represent subsystems of
the system board, not the attachment of the devices.
Password Combinations (POP, HDP,
PAP)
When the power-on password (POP), hard disk password
(HDP), and supervisor password (PAP) are used, the
following situations may occur:
Ÿ
When the POP is the same as the HDP-1 or HDP-2
The POP prompt appears, but one of the HDP
prompts does not appear.
Ÿ
When the POP is not the same as the HDP-1 and
HDP-2
The POP, HDP-1, and HDP-2 prompts all appear.
Ÿ
PAP and HDP-1 or HDP-2
When the PAP is used, the HDP-1 or HDP-2 is
enabled automatically, but no HDP prompt appears.
The HDP-1 and HDP-2 are set the same as the PAP.
Running a Low-Level Format
Do the following to format the hard disk.
Attention: Make sure the drive address to be formatted is
correct. This procedure erases all information on the disk.
1. Power off the computer.
2. Insert the “ThinkPad Hardware Maintenance Diskette
Ver 1.40” or later into diskette drive A and power on
the computer.
3. Select Format the hard disk from the main menu.
4. Select the drive from the menu.
5. Follow the instructions on the screen.
Checking the PC Test Card LED
The green LED on the PC test card turns on when the
PCMCIA test is running. If the LED does not turn on,
check that the card is installed correctly by reseating the
card. If it still does not turn on after it is reseated, try
using another slot for the test. If the LED still does not
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