Compaq 305 specifications Power-On Self Test Post, Running Post

Presario 305 Model

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Power-On Self Test (POST)

Running POST

The Power-On Self Test (POST) is a series of tests that run every time the computer is turned on. POST verifies that the system is configured and functioning properly.

To run POST, complete the following steps:

1.Complete the Preliminary steps.

2.Turn on the computer.

If POST does not detect any errors, the computer beeps once or twice to indicate that POST has run successfully, and the computer boots from the hard drive (or from a bootable diskette if one is installed in the diskette drive).

If POST detects an error, it is indicated by screen and/or audible messages. Refer to the following tables for a list of POST codes and their relevant descriptions. If there is more than one recommended action, only try the later actions in the list if the first action recommended does not solve the problem.

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

refer to the Troubleshooting tables.

102	System board failure
162	System options not set
XX000YZZ 201	Memory Error
301	Keyboard Error
304	Keyboard or System Unit Error
601	Diskette Controller Error
605	Diskette Drive Error
1780	Primary Hard Drive 0 Failure
1782	Hard Drive Controller

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.

	XX000YZZ 201-Memory Error
Probable cause	Recommended action
RAM failure	1. Replace the memory module.

2.Replace the system board.

Memory test data error	1.	Replace the memory module.
	2.	Replace the system board.
XX000YZZ RAM failure	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

Keyboard or system board error

Recommended Action

1.Replace the keyboard.

2.Replace the TouchPad or mouse.

3.Replace the system board.

601-Diskette Controller Error

Probable Cause

Mismatch in drive type or failure in the diskette controller

Recommended Action

1.Run Computer Checkup (TEST).

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

Hard drive controller failure

Recommended Action

1.Run Computer Setup.

2.Replace the hard drive.