HP D315 manual Thermal Sensing and Cooling, System Operational Status LED Indications

Technical Reference Guide

Table 4-13. System Operational Status LED Indication

Table 4-13.

System Operational Status LED Indications

	D315	d325
System Status	Power LED	Power LED
S0: System on (normal operation)	Steady green	Steady green
S1: Suspend	Blinks green @ .5 Hz	Blinks green @ .5 Hz
S3: Suspend to RAM	Blinks green @ .5 Hz	Blinks green @ .5 Hz
S4: Suspend to disk	Off	Off
S5: Soft off	Off	Off
Processor not seated or installed	Steady red	Steady red
CPU thermal shutdown	See note [1]	See note [1]
No memory installed	Blinks red @ 2 Hz	Blinks red @ 2 Hz
Memory error	na	See note [2]
ROM flashing	See note [3]	See note [3]
Video error	na	See note [4]
PCA failure	na	See note [5]
Invalid ROM checksum error	na	See note [6]
System off	Off	Off

NOTE:

For both systems, HD LED is on (green) during hrd rive activity, off at all other times.

[1]Sequence; blinks red every second for 2 seconds, then off for two seconds.

[2]Sequence; blinks red five times in five seconds followed by two-second pause.

[3]Steady red when flashing ROM, then blinks green every second indicating user can restart.

[4]Sequence; blinks red six times in six seconds followed by two-second pause.

[5]Sequence; blinks red seven times in seven seconds followed by two-second pause.

[6]Sequence; blinks red eight times in eight seconds followed by two-second pause.

4.7.4THERMAL SENSING AND COOLING

These systems feature variable-speed fans that are controlled through temperature sensing logic on the system board and/or in the power supply. 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).

High and low thermal parameters are programmed into the ASIC by BIOS during POST. If the high thermal parameter is reached then the fan(s) will be turned on full speed and the Therm- signal will be asserted.

The system board provides connections for a heatsink-mounted CPU fan and a chassis fan, both which complement the power supply fan. The system supports the use of variable-speed fans that are regulated according to the temperature measured by an AMD1030 temperature controller.

Compaq D315 and hp d325 Personal Computers4-27

Featuring the AMD Athlon XP Processor

Second Edition - April 2003