"Compaq.com - Compaq Presario Series Maintenance and Service Guide - Models: 1683, 1685, 1687, 1688, and 1690

 

United States June 27, 2004

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Maintenance & Service Guide for Presario 1600 Series

(Models 1683-1694)

Home Page Notice Preface Product Description Troubleshooting

Illustrated Parts Catalog

Removal & Replacement Procedures Specifications Pin Assignments Battery

Pack Operations

Troubleshooting

Running POST

To run POST, complete the following steps:

Turn off the computer, then turn on the computer.

If POST does not detect any errors, the computer will not beep. This indicates successful completion of POST test. POST has run successfully and boots from the hard drive (or from a bootable diskette if one is installed in the diskette drive).

If POST detects errors, the errors are indicated by screen and/or audible messages. Refer to "Power-On Self-Test (POST) Codes" in the tables for a list of POST codes and their relevant descriptions.

If the system is not functioning well enough to run POST, or if the display is not NOTE: functioning well enough to show POST error messages, refer to the

Troubleshooting tables.

NOTE: The following routines are sorted by their test point numbers assigned in the BIOS code. Their actual orders as executed during POST can be quite different.

Code

 

Beeps

 

POST Routine Description

 

 

 

 

 

 

 

 

 

 

02h

 

 

 

Verify Real Mode

 

 

 

 

 

 

 

 

 

 

03h

 

 

 

Disable Non-Maskable Interrupt (NM)

 

 

 

 

 

 

 

 

 

 

04h

 

 

 

Get CPU type

 

 

 

 

 

 

 

 

 

 

06h

 

 

 

Initialize system hardware

 

 

 

 

 

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