Post Beep Error Messages - Texas Instruments Extensa 660 Series Maintenance Manual

Message
Keyboard clock line failure
Keyboard data line failure
Keyboard stuck key failure
Memory failure at hex-
value , read hex-value ,
expecting hex-value
Unexpected interrupt in
protected mode
Real time clock failure

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.
5-8 Troubleshooting Procedures
Table 5-2 POST Error Messages (continued)
Possible Cause
The keyboard, the keyboard
cable connection, or the
keyboard controller is
defective.
The keyboard controller
firmware has failed.
A key is jammed.
Circuitry associated with the
memory chips has failed.
Hardware interrupt or NMI
occurred while in protected
mode.
The RTC or battery failed.
Action
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.
Check the keyboard controller
and system board. Turn the
power off, then back on again. If
the problem persists, contact
qualified service personnel.
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.
Turn the power off, then back on
again. If the problem persists,
contact qualified service
personnel.
Check the timer chip or the
interrupt controller on the
system board.
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.