10 Information About Your Computer
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Key Combinations
<F2> starts embedded system setup (during
start-up only)
<F12> changes boot sequence (during start-up
only)
<Ctrl><Alt><F10> launches the utility partition (if
installed) during computer start-up
<Ctrl><Enter> disables computer password at start-up
(after correct password is entered)
Controls and Lights
Power control push button
Power light green light; blinking green in sleep state;
dual-color for computer operations —
green for power, yellow for diagnostics
Hard-drive access light green
Link integrity light (on integrated
network connector)
green light for 10-Mb operation; orange
light for 100-Mb operation; yellow light
for 1,000-Mb (1-Gb) operation
Activity light (on integrated network
connector)
yellow blinking light
Diagnostic lights four lights located on the front panel
Power
DC power supply:
Wattage Dell Precision 650 computer: 460 W
Dell Precision 450 computer: 360 W
Heat dissipation Dell Precision 650 computer: 1000
BTU/hr
Dell Precision 450 computer: 910
BTU/hr
Voltage 90 to 135 V at 50/60 Hz; 180 to 265 V at
50/60 Hz
Backup battery 3-V CR2032 lithium coin cell
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