Laptop User Manual
5-8 Troubleshooting Procedures
5.3.3.2 POST Beep Error Messages
In the event of a hardware problem that affects the display, the Notebook also
communicates errors via a series of beeps. These codes may be heard over the
system's speaker as three bursts of beeps. The interpretation of the beep codes is
provided in Table 5-3.
To recover from a self test error, try cycling power to the computer. Also, press
Ctrl-Alt-Esc to ensure that the Setup configuration is correct. In general, most of the
failures are associated with the Upper and Lower Electronics Boards and may require
board removal/replacement.
Table 5-2 POST Error Messages (continued)
Message Possible Cause Action
Keyboard clock line failure
The keyboard, the keyboard
cable connection, or the
keyboard controller is
defective.
Make sure the keyboard cable
and keyboard are connected
properly. Check the keyboard
controller and the system board.
Turn the power off, then back on
again. If the problem persists,
contact qualified service
personnel.
Keyboard data line failure
The keyboard controller
firmware has failed.
Check the keyboard controller
and system board. Turn the
power off, then back on again. If
the problem persists, contact
qualified service personnel.
Keyboard stuck key failure
A key is jammed. Locate the jammed key and fix
it. Make sure the keyboard cable
and keyboard are connected
properly. Turn the power off,
then back on again. If the
problem persists, contact
qualified service personnel.
Memory failure at
hex-
value
, read
hex-value
,
expecting
hex-value
Circuitry associated with the
memory chips has failed.
Turn the power off, then back on
again. If the problem persists,
contact qualified service
personnel.
Unexpected interrupt in
protected mode
Hardware interrupt or NMI
occurred while in protected
mode.
Check the timer chip or the
interrupt controller on the
system board.
Real time clock failure
The RTC or battery failed. Run SETUP and turn the power
off and on. If the problem
persists, replace the RTC
battery. If the problem remains,
contact qualified service
personnel.