Symptom; Action - Sun Microsystems Ultra 1 Series Service Manual

Press the power switch at the rear of the system. If the system powers on, the
keyboard may be defective or the system was unable to accept the keyboard power
on signal at that time. Power off the system and press the keyboard power on switch
again. If the system powers on, no further action is required. If the system does not
power on, the keyboard may be defective. Connect a different Sun Type 5 or Sun
Compact-1 keyboard and press the power key.
Note - The Sun Type 4 keyboard does not have a power on key, and will cause the
system to power up as soon as the Type 4 keyboard is connected to the system. The
Type 4 keyboard is not supported on the Sun Ultra 1 system.
If you verified that AC power is being supplied to the system and the system does
not power up, the system"s power supply may be defective. See "Power Supply
Test" on page 19.
The system attempts to power up, but does not initialize the monitor and does not
boot.
Press the power on switch and observe the keyboard. The lights (LEDs) on the
keyboard should be lit briefly and you should hear a tone from the keyboard. If you
hear no tone or see no lights on the keyboard, the system"s power supply may be
defective. See "Power Supply Test" on page 19" below. If you hear a tone and see
lights on the keyboard, but the system still fails to initialize, see "System Board Test"
on page 27.
No video output on the system monitor.
Check the power cord to be sure that it is connected to the monitor and to the wall
outlet. Verify that the wall outlet is supplying AC power to the monitor. Check the
video cable connection between the monitor and the system"s graphics card output
port at the rear of the system. If the AC connection to the monitor is correct and the
video cable is correctly connected, the system monitor or the system"s internal
graphics card may be defective. Replace the monitor or the graphics card.
Sun Ultra 1 Series Service Manual ♦ Revision A, November 1995
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