Maintenance & Service Guide
Presario 1800 Series
Models: 1805 and 1810
Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal & Replacement Procedures Specifications Pin Assignments Battery Pack Operations
Power-On Self Test (POST)
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
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.
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Probable Cause | Recommended Action | |
DMA, timers, etc. | Replace the system board. | |
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Probable Cause | Recommended Action | |
Configuration incorrect | Run Computer Setup. | |
CMOS reflects that an invalid | Run Computer Setup. | |
configuration has been set. |
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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 |
Probable Cause | Recommended Action |
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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 | 1. Run Computer Checkup (TEST). |
diskette controller |
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2.Check and/or replace cables.
3.Replace the system board.
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Probable Cause | Recommended Action | |
Mismatch in drive type | Run Computer Setup. | |
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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. |
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Probable Cause | Recommended Action | |
Hard drive controller failure | 1. | Run Computer Setup. |
| 2. | Replace the hard drive. |