How To Run The Keyboard Diagnostics - IBM ThinkPad 340 Series Hardware Maintenance Manual

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 the 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 a black square.
Note: When a Fn key is pressed, a black square
briefly appears.
Product Overview
The following table shows an overview of the system
features.
Feature
Processor
Bus
Architecture
Memory
(Standard)
Memory
(Option)
CMOS RAM
VGA Video
Diskette Drive
(Removable)
Hard Disk
Drive
(Removable)
DSP Card
424
IBM Mobile Systems HMM
Description
755CE, 755CSE, 755CV
– Intel DX4 100/33 MHz
755CX
– P54C-75 MHz w/ L2 cache
AT Bus
VESA Local Bus for video subsystem
8MB (on the system board)
2, 4, 8, 16MB, Basic IC DRAM card
(max. 16 MB)
4, 16MB, DIMM card (max. 32 MB)
DIMM card adapter
128 Bytes
755CE, 755CV
– 10.4-inch, 65 536 colors, TFT
color LCD
755CSE
– 10.4-inch, 256 colors, STN color
LCD
755CX
– 10.4-inch, 65 536 colors, VGA
TFT color LCD (640 by 480
resolution)
– 10.4-inch, 65 536 colors, SVGA
TFT color LCD (800 by 600
resolution)
0.720, 1.2, 1.44, 2.88MB (4-mode),
3.5-inch
0.720, 1.44, (2-mode), 3.5-inch
340MB, 2.5-inch
540MB, 2.5-inch
810MB, 2.5-inch
Microphone jack
Headphone jack
Modem port