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Chapter 4. Troubleshooting
Symptom list
Is something wrong?
If you suspect something is not working correctly, you should:
1. Turn on the computer and monitor.
2. Set the brightness control (
3. Make sure that all cables are securely connected.
4. Disable the computer's screen saver program if it is enabled.
5. Set the display mode to a supported display mode.
6. If you still have trouble, go to the symptom list below and find the
symptom that most resembles yours.
Before calling your retailer or IBM, find the symptom that most resembles
yours, and try the suggested action. You may be able to solve the
problem yourself.
Symptom
Possible cause
Screen is blank and
No power to the
power indicator is off
monitor
Screen is blank and
Brightness may
power indicator is
be too low
steady green
Screen is blank and
The monitor is in
power indicator is
Standby mode
steady amber
The video cable
is not connected
Screen is blank and
The display
power indicator is
mode of the
blinking amber every
computer is
second
outside the
range of the
monitor
Screen is blank and
An internal
power indicator is
monitor fault has
blinking amber every
occurred
0.25 second
Image appears to be
There is noise in
smeared
the video signal
A few pixels are
The LCD contains over 27,000,000 thin-film transistors
missing, discolored,
(TFTs). A few may fail causing pixels to be missing,
or inappropriately lit
discolored or lit.
This is an intrinsic characteristic of TFT LCD technology
and is not a defect.
) to the proper position.
Suggested action
No power to the monitor the monitor
are both switched on.
Check that the power cord is firmly
plugged into the electrical outlet and
the power supply unit.
If the power cord plug has a
removable fuse, replace it. Try
another power cord. Try another
electrical outlet.
Adjust the brightness
Press any key on the keyboard or
move the mouse to restore operation.
Check that the signal cable is firmly
connected.
Check that no pins are bent in the
signal cable connector.
Reconfigure the computer to use a
supported display mode.
Check that the power cord is firmly
plugged into the electrical outlet.
Ensure that the power adapter cord is
firmly connected. If the symptom
remains, call your retailer or IBM.
Check that the signal cable is firmly
connected.
Check that no pins are bent in the
signal cable connector.
Chapter 4. Troubleshooting
19
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