Power-On Self-Test (Post) - HP Presario 5800 Series Maintenance & Service Manual

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Power-On Self-Test (POST)

POST is a series of diagnostic tests that run automatically when the system is turned on. After
the computer is turned on, POST checks the following assemblies to ensure that the computer
system is functioning properly:
Keyboard
System board
Memory modules
Video memory
Diskette drive
Hard drive
CD (or DVD) drive
Power supply
POST also detects the type of mass storage devices installed in the computer.
If POST finds an error
message.
Maintenance & Service Guide
Presario 5800 Series Personal Computers
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