Compaq 1800T, 1825 specifications Power-On Self Test Post, Running Post

Maintenance & Service Guide

Presario 1800 Series

Models: 1825 and 1800T

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Power-On Self Test (POST)

Running POST

To run POST, complete these directions:

Turn off the computer, then turn on the computer. As soon as the Compaq logo appears press the ESC key to clear the logo and display the POST messages as they occur.

If POST does not detect any errors, the computer will not beep. This indicates successful completion of the 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.

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

	Power-On Self-Test Messages
	102-System Board Failure
Probable Cause	Recommended Action
DMA, timers, etc.	Replace the system board.
	162-System Options Not Set
Probable Cause	Recommended Action
Configuration incorrect	Run Computer Setup.
CMOS reflects that an invalid	Run Computer Setup.
configuration has been set.
RAM failure	1.	Replace the memory modules.
	2.	Replace the system board.
Memory test data error	1.	Replace the memory modules.
	2.	Replace the system board.
XX000YZZ RAM failure	Replace the system board.

XX000YZZ 201-Memory Error

Probable Cause	Recommended Action
	1.	Replace the memory modules.
	2	Replace the system board.
	301-Keyboard Error
Probable Cause	Recommended Action
Keyboard failure	1.	Ensure the keys are not depressed during POST.

2.Reconnect the keyboard with the computer off.

3.Replace the keyboard.

	304-Keyboard or System Unit Error
Probable Cause	Recommended Action
Keyboard or system board error	1. Replace the keyboard.

2.Replace the TouchPad or mouse.

3.Replace the system board.

601-Diskette Controller Error
Probable Cause	Recommended Action
Mismatch in drive type or failure in the diskette	1. Run Computer Checkup (TEST).
controller

	2.	Check and/or replace cables.
	3.	Replace the system board.
	605-Diskette Drive Error
Probable Cause	Recommended Action
Mismatch in drive type	Run Computer Setup.
	1780-Primary Hard Drive 0 Failure
Probable Cause	Recommended Action
Disk 0 failed to respond	1.	Run Computer Checkup (TEST).
	2.	Replace the hard drive.
Hard drive format error	1.	Run Computer Checkup (TEST).
	2.	Replace the hard drive.
	1782-Hard Drive Controller
Probable Cause	Recommended Action
Hard drive controller failure	1.	Run Computer Setup.
	2.	Replace the hard drive.

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