Sun Microsystems 2500 manual Troubleshooting and Technical Support

TABLE 4-1Troubleshooting Procedures (Continued)

SymptomTroubleshooting

No video displays on	1. Is the monitor cable attached to the graphics accelerator?
the monitor screen.	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-deviceis set to screen and
	input-device is set to keyboard.
	e. If the ok prompt does not display, or if changing the output-devicesetting does
	not help, contact a Sun Service Support Center.
Workstation does not	Keep notes on the following situations in case you need to call service:
power on when the	1. Is the Power button LED illuminated on the front of the system?
front panel Power
button is pressed.		(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	1. Verify that the mouse and keyboard cables are connected to the on-board USB 1.1
does not respond to		connectors on the workstation. (Do not connect the mouse and keyboard to the USB
actions.
		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	The power-indicator LED only blinks when all workstation components are in low-
be in low-power mode,	power mode. A tape drive might be connected to your workstation. Because tape
but the Power button
	drives do not enter low-power mode, the power-indicator LED does not blink.
LED does not blink.

Chapter 4 Troubleshooting and Technical Support 37