HP kp721av Benutzerhandbuch
Technical Reference Guide
www.hp.com
4-13
System Support
4.5.3 System Status
These systems provide a visual indication of system boot, ROM flash, and operational status
through the power LED and internal speaker, as described in Table 4-8.
through the power LED and internal speaker, as described in Table 4-8.
.
NOTES:
Beeps are repeated for 5 cycles, after which only blinking LED indication continues.
[1] Repeated after 2 second pause.
[2] Beeps are produced by the internal chassis speaker.
[3] Check that CPU power connector P3 is plugged in.
[1] Repeated after 2 second pause.
[2] Beeps are produced by the internal chassis speaker.
[3] Check that CPU power connector P3 is plugged in.
4.5.4 Thermal Sensing and Cooling
All systems feature a variable-speed fan mounted as part of the processor heatsink assembly. All
systems also provide or support an auxiliary chassis fan. All fans are controlled through
temperature sensing logic on the system board and/or in the power supply. There are some
electrical differences between form factors and between some models, although the overall
functionally is the same. Typical cooling conditions include the following:
systems also provide or support an auxiliary chassis fan. All fans are controlled through
temperature sensing logic on the system board and/or in the power supply. There are some
electrical differences between form factors and between some models, although the overall
functionally is the same. Typical cooling conditions include the following:
1. Normal—Low fan speed.
2. Hot processor—ASIC directs Speed Control logic to increase speed of fan(s).
3. Hot power supply—Power supply increases speed of fan(s).
4. Sleep state—Fan(s) turned off. Hot processor or power supply will result in starting fan(s).
Table 4-8.
System Operational Status LED Indications
System Status
PowerLED
Beeps [2]
Action Required
S0: System on (normal
operation)
Steady green
None
None
S1: Suspend
Blinks green @ .5 Hz
None
None
S3: Suspend to RAM
Blinks green @ .5 Hz
None
None
S4: Suspend to disk
Off – clear
None
None
S5: Soft off
Off – clear
None
None
Processor thermal shutdown
Blinks red 2 times @ 1 Hz [1]
2
Check air flow, fans, heatsink
Processor not seated / installed Blinks red 3 times @ 1 Hz [1]
3
Check processor
presence/seating
Power supply overload failure
Blinks red 4 times @ 1 Hz [1]
4
Check system board problem
[3],
Memory error (pre-video)
Blinks red 5 times @ 1 Hz [1]
5
Check DIMMs, system board
Video error
Blinks red 6 times @ 1 Hz [1]
6
Check graphics card or
system board
PCA failure detected by BIOS
(pre-video)
Blinks red 7 times @ 1 Hz [1]
7
Replace system board
Invalid ROM checksum error
Blinks red 8 times @ 1 Hz [1]
8
Reflash BIOS ROM
Boot failure (after power on)
Blinks red 9 times @ 1 Hz [1]
9
Check power supply,
processor, sys. bd
Bad option card
Blinks red 10 times @ 1 Hz [1]
None
Replace option card