Nortel Networks NN44200-700 BIOS beep codes, Description, Information, Error type, Beep, Message

30Chapter 3 Hardware troubleshooting

Description	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.
RAID controller LEDs	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.

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	Description
Non-fatal error	In most cases, these error allow the system to continue the bootup
	process. Error messages normally appear on the screen.
Fatal error	These errors do not allow the system to continue the bootup process.

The following table describes the errors communicated by beeps.

Beep	Message	Description
count
1	Refresh Failure	The memory refresh circuitry of the processor board is
		faulty.
2	Parity error	A parity error was detected in the base memory (the first
		block of 64 kbytes of the system).
3	Base 64KB Memory Failure	A memory failure occurred in the first 64 KB of memory.
4	Timer Not Operational	A memory failure occurred in the first 64 KB of memory, or
		Timer #1 on the processor board failed to function properly
5	Processor Error	The CPU on the processor board generated an error.
6	8042 - Gate A20 Failure	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

5.026 June 2007

Copyright © 2007, Nortel Networks