Nortel CallPilot NN44200-700 Troubleshooting Manual page 30

30 Chapter 3 Hardware troubleshooting
Description
RAID controller LEDs
BIOS beep codes
During the power-on self test (POST) routines performed each time that the
system is powered on, various errors can occur.
Error type
Non-fatal error
Fatal error
The following table describes the errors communicated by beeps.
Beep Message
count
1 Refresh Failure
2 Parity error
3 Base 64KB Memory Failure
4
Timer Not Operational
5
Processor Error
6 8042 - Gate A20 Failure
Copyright © 2007, Nortel Networks
.
Information
started and the CallPilot diagnostic screen has appeared, then
the MPB96 board is defective or the DSP and NTBus drivers
do not function properly.
• The CTbus FPGA Done LED (the farthest from the card I/O
bracket) works in tandem with the DSP FPGA Done LED and
turns on and off at the same time.
The RAID card has one red LED and eight small LEDs on the back.
When the card works properly, the red LED comes briefly on at
startup; this indicates that the card was accessed for detection. At
the same time, all eight LEDs at the back come on, and then half
of them turn off and stay off. Four LEDs lit at the back of the card
indicate that the card works properly. If all eight LEDs stay on after
startup and boot, the card was not detected or is defective.
Description
In most cases, these error allow the system to continue the bootup
process. Error messages normally appear on the screen.
These errors do not allow the system to continue the bootup process.
Description
The memory refresh circuitry of the processor board is
faulty.
A parity error was detected in the base memory (the first
block of 64 kbytes of the system).
A memory failure occurred in the first 64 KB of memory.
A memory failure occurred in the first 64 KB of memory, or
Timer #1 on the processor board failed to function properly
The CPU on the processor board generated an error.
The keyboard controller (8042) contains the Gate A20
switch, which allows the CPU to operate in protected
mode. This error message means that the BIOS is not
able to switch the CPU in the protected mode.
Nortel CallPilot
Troubleshooting Reference Guide
NN44200-700 01.05 Standard
5.0 26 June 2007