Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin
Specifications
Parts Catalog
Removal Sequence
Troubleshooting
Battery Operations
Product Description
Pin Assignments
Index
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.
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.
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
configuration has been set.
Run Computer Setup
.
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
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
controller
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
Recommended Action
Hard drive controller
failure
1.
Run Computer Setup
.
2.
Replace the hard drive
.
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