If a beep code is emitted, write down the series of beeps and then look it up in Table 2-8. If you are unable to resolve the problem by looking up the meaning

of the beep code, use system diagnostics to identify the possible cause. If you are still unable to resolve the problem, see

Table 2-8. System Beep Codes

Code

Cause

1-1-2

CPU register test failure

1-1-3

CMOS write/read failure; faulty system board

1-1-4

BIOS error

1-2-1

Programmable interval-timer failure; faulty system

board

1-2-2

DMA initialization failure

1-2-3

DMA page register write/read failure

1-3-1

Main-memory refresh verification failure

1-3-2

No memory installed

1-3-3

Chip or data line failure in the first 64 KB of main

memory

1-3-4

Odd/even logic failure in the first 64 KB of main

memory

1-4-1

Address line failure in the first 64 KB of main

memory

1-4-2

Parity failure in the first 64 KB of main memory

1-4-3

Fail-safe timer test failure

1-4-4

Software NMI port test failure

2-1-1

Bit failure in the first 64 KB of main memory

through

2-4-4

3-1-1

Slave DMA-register failure

3-1-2

Master DMA-register failure

3-1-3

Master interrupt-mask register failure

3-1-4

Slave interrupt-mask register failure

3-2-2

Interrupt vector loading failure

3-2-4

Keyboard-controller test failure

3-3-1

CMOS failure

3-3-2

System configuration check failure

3-3-3

Keyboard controller not detected

3-3-4

Video memory test failure

3-4-1

Screen initialization failure

3-4-2

Screen-retrace test failure

3-4-3

Video ROM search failure

4-2-1

No timer tick

4-2-2

Shutdown test failure

4-2-3

Gate A20 failure

4-2-4

Unexpected interrupt in protected mode

4-3-1

Improperly installed or faulty memory modules

4-3-2

No memory modules installed in the first memory

module connector

4-3-3

Faulty system board

4-3-4

Time-of-day clock stopped

4-4-1

Super I/O chip failure; faulty system board

4-4-4

Cache test failure; faulty processor

Warning Messages

A warning message alerts you to a possible problem and prompts you to respond before the system continues a task. For example, before you format a

diskette, a message will warn you that you may lose all data on the diskette. Warning messages usually interrupt the task and require you to respond by

typing y (yes) or n (no).

Corrective Action

See

"Troubleshooting the

Microprocessor" in "Troubleshooting Your System."

Faulty system board. See

"Getting

Reflash the BIOS.

Faulty system board. See

"Getting

See

"Troubleshooting System