HP OmniBook 5500 Familiarization Manual page 38

First POST: BEEP
CODES
First POST: BEEP
CODES
w A note about interpreting self-test results.
Self-test alone should not be used to diagnose a hardware problem. If the self-test
results are absolutely clear and repeatable, confirm the results with at least two other
non-self-test failure symptoms.
w The OmniBook 5500 BIOS includes a POST facility that tests a number of
hardware and firmware items in the unit at each cold-start (BOOT or RESET).
These multiple beep codes indicate a failure in a simple test of:
w a portion of base memory
w Flash BIOS checksum
w a portion of conventional memory
w a portion of extended memory
w If the unit fails to boot:
all accessories are removed, including memory cards, external floppy, port expander,
modems, PCMCIA cards, LAN cards, printers, VGA-out cables, external pointing
devices, clean AC power is provided (no "chained" battery chargers or auto
adapters), and press reset.
If the unit still fails to boot, it requires service.
w Beep codes
Beep codes are used to identify a POST error that occurs when the screen is not
available. Once the screen is operating, diagnostic messages are reported to the
screen. There are beep codes for both fatal and nonfatal system board errors.
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