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 a series of beeps (long and short duration). 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

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 pow e r o ff, then back on
again. If the problem persists ,
contact qualified servi ce
personnel.
Keyboard d a ta line failure The keyboar d controller
firmware has fa iled . Check the keyboard controller
and system board. Turn the
power off, then b a c k o n 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 fa ilure at hex-
value, read hex-value,
expecting hex-value
Circuitry associated with the
memory c hips has failed. Turn the pow e r o ff, then back on
again. If the problem persists ,
contact qualified servi ce
personnel.
Unexpecte d interrupt in
protected mode Hardware i nterrupt or NMI
occurred while in protected
mode.
Check the tim e r c h ip o r th e
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 servi ce
personnel.