Technical Reference Guide www.hp.com 7-7
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 7-5.
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.
Blinks 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.
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