HP ZT1100 manual Power-On Self-Test, Insyde MobilePRO Bios Post Beep Codes and Messages

Power-On Self-Test

The POST (Power-On Self-Test) is a series of initialization routines and diagnostic tests that the system BIOS runs when the notebook boots. The system BIOS will not boot the operating system if system memory, the CPU, DMA, or interrupt controller fails the POST diagnostic tests. POST progress is indicated by a sequence of codes, and error messages are displayed if possible.

You should not necessarily interpret the failure of one or more POST tests as a hardware, software, or firmware failure. If an error message appears, confirm the problem using other diagnostic tools. Not all POST messages indicate a hardware, software, or firmware failure—some messages are for information only.

First, confirm the failure by performing a “clean” boot, as described below: If the notebook fails to restart with a clean boot, it requires repair.

1.Remove all accessories, including SDRAM modules, PC cards, printer, external monitor, pointing device, and keyboard.

2.Provide “clean” AC power—no auto adapter or unusual AC adapter configuration.

3.Press the reset switch to return the notebook to a known state.

If the BIOS detects a terminal error condition, it halts POST after issuing a terminal error beep code and/or displaying a message (see the following table). The beep code indicates the POST routine in which the terminal error occurred.

If the system fails after you make changes using the BIOS configuration utility, reset the notebook, enter the BIOS configuration utility, and install the defaults or correct the error.

Table 3-3. Insyde MobilePRO BIOS POST Beep Codes and Messages

Beep Code

5 short, 1 long

4 short, 1 long,

1 short

Message

FAULTY DMA PAGE REGISTERS

FAULTY REFRESH CIRCUIT

Description

DMA page registers do not function properly.

RAM refresh circuit does not function properly.

4 short, 2 long

3 short; 1 long,

2short

3short, 1 long,

1short, 1 long

3 short; 2 long,

1 short

3 short; 3 long

2 short, 1 long;

3 short

2 short, 1 long;

2 short, 1 long

(None)

(None)

(None)

(None)

ROM CHECKSUM INCORRECT

CMOS RAM TEST FAILED

DMA CONTROLLER FAULTY

INTERRUPT CONTROLLER FAILED

(None)

(None)

(None)

KEYBOARD CONTROLLER FAILURE

KEYBOARD FAILURE

CMOS FAILURE - RUN SCU

CMOS CHECKSUM INVALID - RUN SCU

BIOS ROM checksum failed.

CMOS RAM test failed.

DMA controller does not work properly.

Interrupt controller does not work properly.

Keyboard controller failed to respond to the self- test command.

No video device found.

No RAM installed.

Keyboard controller failed during system inquiry about connected devices.

Keyboard fails to respond or no keyboard is connected.

CMOS data error, probably due to loss of battery power.

CMOS checksum error.

HP Pavilion zt1100/xz100 Omnibook xt1000 Troubleshooting and Diagnostics 3-25