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How to Run the Low Level Format
Do the following to format the hard disk.
Note: Make sure the drive address to be formatted is
correct. This procedure will erase all information
on the disk.
1. Power-off the computer.
2. Insert the ThinkPad 755Ce hardware maintenance
diskette into diskette drive A and power-on the
computer. (You can use this maintenance diskette for
all ThinkPad 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 + Description
F1 Reserved
F2 Fuel-gauge display ON/OFF
F3 Standby mode invocation
F4 Suspend mode invocation
F5 Audio volume Down
F6 Audio volume UP
F7 LCD/CRT display switching
F8 Reserved
F9 Reserved
F10 Reserved
F11 Power management mode
switching
(Toggles High power,
Intelligent, Economy)
F12 Hibernation invocation
ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 423