Video Output Failure; Disk Or Cd-Rom Drive Failure - Sun Microsystems Ultra 1 Creator Series Service Manual

If the wall receptacle AC power has been verified and the system unit does not
power up, the system unit power supply may be defective. See Section 4.4 "Power
Supply Test" on page 4-4.
SYMPTOM
The system unit attempts to power up but does not boot or initialize the monitor.
ACTION
Press the power-on switch and watch the keyboard. You should see the keyboard
LEDs light briefly and hear a tone from the keyboard. If you do not hear a tone or if
the keyboard LEDs do not light briefly, the system unit power supply may be
defective. See Section 4.4 "Power Supply Test" on page 4-4. If you hear a keyboard
tone and see the keyboard LEDs light briefly but the system unit still fails to
initialize, refer to Section 3.9 "System and Keyboard LEDs" on page 3-12.
4.2

Video Output Failure

The following provides an example of a video output failure symptom and
suggested action.
SYMPTOM
No video at the system monitor.
ACTION
Check the monitor AC power cord. Ensure that the AC power cord is connected to
the monitor and to the wall receptacle. Verify that the wall receptacle is supplying
AC power to the monitor. Check the video cable connection between the monitor
and the system unit graphics card output port at the rear of the system unit. If the
AC connection to the monitor is correct and the video cable is correctly connected,
the system monitor or the system unit graphics card may be defective. Replace the
monitor or the graphics card.
4.3

Disk or CD-ROM Drive Failure

The following provides examples of disk drive and CD-ROM drive failure
symptoms and suggested actions.
SYMPTOM
4-2 Ultra 1 Creator Series Service Manual • August 1996