Power-On Self Tests (Post) - HP Vectra XU5 Supplementary Manual

Power-On Self Tests (POST)

When the PC is switched on or reset, a Power-On Self Test (POST) is performed, testing the
system hardware.
If an error is detected, the error message utility displays an error diagnosis and corrective
action. For example:
Vectra XU Familiarization Guide Troubleshooting and Repair 46