HP Presario 300 Presario 305 Series Maintenance and Service Guide - Page 58

Before You Begin Removal Sequence Product Description Presario 305 Model Specifications Troubleshooting Pin Assignments Parts Catalog Battery Operations 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. 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. 102 162 XX000YZZ 201 301 304 601 605 1780 1782 System board failure System options not set Memory Error Keyboard Error Keyboard or System Unit Error Diskette Controller Error Diskette Drive Error Primary Hard Drive 0 Failure 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. Probable cause RAM failure XX000YZZ 201-Memory Error Recommended action 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.