HP 5000c-ct Manuale Utente
49
Troubleshooting and Repair
OmniBook Self-Test
The complete self-test procedure is documented in the OmniBook
5000 Operating Guide.
5000 Operating Guide.
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.
If the self-test results are absolutely clear and repeatable, confirm
the results with at least two other non-self-test failure symptoms.
The OmniBook 5000 BIOS includes a POST facility that tests a
number of hardware and firmware items in the unit at each cold-
start (BOOT or RESET).
number of hardware and firmware items in the unit at each cold-
start (BOOT or RESET).
First POST: BEEP CODES
These multiple beep codes indicate a failure in a simple test of:
a portion of base memory
Flash BIOS checksum
a portion of conventional memory
a portion of extended memory
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.
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.
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.
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.