IBM ThinkPad 340 Series Hardware Maintenance Manual page 241

Note: You can use this maintenance diskette for all
Models.
3. Select Format the hard disk from the main menu.
4. Select the drive from the menu.
5. Follow the instructions on the screen.
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
turn on and the test fails, replace the FRU shown in the
diagnostic error code.
Fn Key Combinations
The following table shows the Fn key and function key
combinations and their corresponding functions.
The Fn key works independently from the operating
system. The operating system obtains the status through
the system management interface to control the system.
Fn +
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
How To Run the Keyboard Diagnostics
Do the following to run the keyboard test.
1. Go to the advanced diagnostic screen menu by
pressing Ctrl+A in Easy-Setup menu.
2. Go to the keyboard diagnostic test menu by pressing
Ctrl+K.
3. Check that when each key is pressed, the key
position on the keyboard layout on the screen
changes to be a black square.
Note: When a Fn key is pressed, the black square
briefly appears.
ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs
Description
Reserved
Fuel-gauge display ON/OFF
Standby mode invocation
Suspend mode invocation
Audio volume Down
Audio volume UP
LCD/CRT display switching
LCD normal/reverse switching
Reserved
Reserved
Power management mode switching
(Toggles High power, Intelligent, Economy)
Hibernation invocation
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