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Chapter 4 Troubleshooting and Technical Support 37
No video displays on
the monitor screen.
1. Is the monitor cable attached to the graphics accelerator?
2. Does the monitor work when connected to another system?
3. If you have another monitor, does it work when connected to the original system?
4. Verify that OpenBoot™ PROM defaults are set properly:
a. Press and hold the Power button for 4 seconds to power off the system.
b. Wait 4 seconds and power on the system.
c. As soon as the Power button blinks, quickly press the Power button twice. The ok
prompt is displayed and the system enters a safe NVRAM mode.
d. Verify these OpenBoot PROM parameters: output-device is set to screen and
input-device is set to keyboard.
e. If the ok prompt does not display, or if changing the output-device setting does
not help, contact a Sun Service Support Center.
Workstation does not
power on when the
front panel Power
button is pressed.
Keep notes on the following situations in case you need to call service:
1. Is the Power button LED illuminated on the front of the system?
(Ensure that the power cord is connected to the system and to a grounded power
receptacle.)
2. Does the wall outlet have power? Test by plugging in another device.
3. Does the system beep when the system is powered on? (Ensure that the keyboard is
plugged in.)
4. Test with another keyboard that you know is functional. Does the system beep when
you connect the keyboard and power on the system?
5. Does the monitor sync within 5 minutes after power on? (The green LED on the
monitor stops flashing and remains illuminated.)
Note: If the monitor syncs but does not display an ok prompt or a login window, the
system might not be passing POST. Call a Sun Service Support Center.
If the system passes POST and displays the ok prompt but does not boot Solaris,
type: boot
Keyboard or mouse
does not respond to
actions.
1. Verify that the mouse and keyboard cables are connected to the on-board USB 1.1
connectors on the workstation. (Do not connect the mouse and keyboard to the USB
connectors on the IEEE 1394 and USB 2.x card.)
2. Verify that the workstation is powered on and the front Power button LED is
illuminated.
Workstation appears to
be in low-power mode,
but the Power button
LED does not blink.
The power-indicator LED only blinks when all workstation components are in low-
power mode. A tape drive might be connected to your workstation. Because tape
drives do not enter low-power mode, the power-indicator LED does not blink.
TABLE 4-1 Troubleshooting Procedures (Continued)
Symptom Troubleshooting