HP Compaq dc7100 DT Getting Started Manual page 44

Getting Started
Diagnostic Front Panel LEDs and Audible Codes
Activity
System does not
power on and
LEDs are not
flashing.
40
Beeps Possible Cause
None System unable to
power on.
www.hp.com
Recommended
Action
Press and hold the
power button for less
than 4 seconds. If the
hard drive LED turns
green, then:
1. Check that the
voltage selector,
located on the rear
of the power supply,
is set to the
appropriate
voltage. Proper
voltage setting
depends on your
region.
2. Remove the
expansion cards
one at a time until
the 3.3 V_aux light
on the system board
turns on.
3. Replace the system
board.
OR
Press and hold the
power button for less
than 4 seconds. If the
hard drive LED does not
turn on green then:
1. Check that the unit
is plugged into a
working AC outlet.
Getting Started