Figure 4-4 Power Problem (Continued) - Sun Microsystems Blade 1500 Service, Diagnostics, And Troubleshooting Manual

A
Does the power supply
fan spin?
Y
Do any system
fans spin?
Y
Wait a moment.
Does
the system beep and
immediately power off?
Y
Check motherboard and
replace if necessary. See
"Motherboard Problem"
on page 4-34.
FIGURE 4-4
N
Did you replace the
power switch?
Y
Did you replace the
power supply?
Y
Check motherboard and
replace if necessary. See
"Motherboard Problem"
on page 4-34.
N
N
Does
the light in the power
button flash or stay lit?
Y
Return to "Power-On
Flowchart" on page 4-3.
Power Problem (Continued)
N
N
Replace power supply.
See "Replacing the Power
Supply" on page 13-2.
Does the hard
drive spin up?
Y
System fan problem. See
"System Fan Problem" on
page 4-9.
N
Check power switch and
replace if necessary. See
"Replacing the Power
Switch Assembly" on
page 14-17.
Chapter 4 Troubleshooting Flowcharts
Check power switch and
replace if necessary. See
"Replacing the Power
Switch Assembly" on
page 14-17.
N
Check motherboard and
replace if necessary. See
"Motherboard Problem"
on page 4-34.
4-7