Beep Codes; Post And Boot Messages - Digital Equipment CELEBRIS Pentium PC Service Maintenance Manual

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Beep Codes

When POST finds an error and cannot display a message, the computer's speaker emits a series of beeps to
indicate the error. For example, video failure or configuration error is indicated by a 1 - 2 beep code (a
burst of three beeps, one long beep followed by two short beeps).
The following table lists other fatal error and their associated beep codes. Each code represents the number
of short beeps that are grouped together. Fatal errors (errors that lock up the computer) are generally the
result of a failed main logic board or some other add-on component (SIMM, BIOS, computer battery, etc.).
BeepCode
C
1-2
E
2-2-3
L
3-1-1
E
3-1-3
B
3-4-1
R 3-4-3
2-1-2-3
2-2-3-1
S
5

POST and Boot Messages

8
6
The POST displays messages to alert to errors in hardware, software, and firmware or to provide operating
information about the computer.
Each time the POST displays a message on screen, the computer's speaker beeps twice. If an error occurs
before the monitor is initialized, specific beep codes sound to alert to a problem. The following table lists
a general grouping of system messages. In addition, each message is accompanied by text describing the
message and in most cases a recommended solution to the problem.
Italics indicate variable parts of a message such as memory addresses,
NOTE
hexadecimal values, and so on. These messages can differ at each occurrence.
Message
nnnn Cache SRAM Passed
Diskette drive A error
Diskette drive B error
Entering SETUP
Extended RAM Failed at
offset: nnnn
Extended RAM Passed: nnnn
64
Error Message
Video failure or configuration error
BIOS ROM checksum
Test DRAM refresh
Test keyboard controller
Test 512K base address lines
Test 512K base memory
Check ROM copyright notice
Test for unexpected interrupts
Description/Solution
Where nnnn is the amount of computer cache (in kilobytes) that tested
successfully.
Run the BIOS Setup utility. Check all connections. If the problem
persists, replace the faulty diskette drive.
BIOS Setup utility runs.
Extended memory failed or configured incorrectly.
Make sure SIMMs are installed correctly. If the problem persists,
replace SIMMs.
Run the BIOS Setup utility and restore all settings to original values.
Where nnnn is the amount of extended memory (in kilobytes) that
tested successfully.
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