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HP DC5850 User Manual

Page 79

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Technical Reference Guide

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7-5

Power and Signal Distribution

A dual-color LED located on the front panel (bezel) is used to indicate system power status. The
front panel (bezel) power LED provides a visual indication of key system conditions listed as
follows:

NOTE:
[1] Will be accompanied by the same number of beeps, with 2-second pause between cycles. Beeps

stop after 5 cycles.

Table 7-4.

Power LED Indications

Power LED

Condition

Steady green

Normal full-on operation

Blinks green @ 0.5 Hz

Suspend state (S1) or suspend to RAM (S3)

Blinks red 2 times @ 1 Hz [1]

Processor thermal shut down. Check air flow, fan

operation, and CPU heat sink.

Blinks red 3 times @ 1 Hz [1]

Processor not installed. Install or reseat CPU.

Bli

nks red 4 times @ 1 Hz [1]

Power failure (power supply is overloaded). Check storage

devices, expansion cards and/or system board (CPU

power connector P3).

Blinks red 5 times @ 1 Hz [1]

Pre-video memory error. Incompatible or incorrectly seated

DIMM.

Blinks red 6 times @ 1 Hz [1]

Pre-video graphics error. On system with integrated

graphics, check/replace system board. On system with

graphics card, check/replace graphics card.

Blinks red 7 times @ 1 Hz [1]

PCA failure. Check/replace system board.

Blinks red 8 times @ 1 Hz [1]

Invalid ROM (checksum error). Reflash ROM using CD or

replace system board.

Blinks red 9 times @ 1 Hz [1]

System powers on but fails to boot. Check power supply,

CPU, system board.

Blinks red 10 times @ 1 Hz [1]

Bad option card.

No light

System dead. Press and hold power button for less than 4

seconds. If HD LED turns green then check voltage select

switch setting or expansion cards. If no LED light then check

power button/power supply cables to system board or

system board.