No Video Output On The System Monitor; Power-On Does Not Succeed - Sun Microsystems SPARC classic Service Manual

TABLE 4-1
Problem
Slow disk drive response.
Read, write, or parity error
reported by the operating system
or applications.
Power on does not succeed. LEDs
on keyboard do not light and
there is no tone from the keyboard
when you turn on the system
power.
Power on does not succeed. The
system fails to initialize but the
LEDs on the keyboard light and
there is a tone from the keyboard.
4.1

No Video Output on the System Monitor

1. Check that the power cord is connected to the monitor and to the wall outlet.
2. Verify that the wall outlet is supplying AC power to the monitor.
Use a Volt Ohmmeter (VOM).
3. Verify that the video cable connection is secure between the monitor and the
system video output port.
Use a VOM to perform the continuity test on the video cable.
If the power cord and video cable connection are good and there is still no video
output, reseat the video card for the monitor.
4. If the monitor power supply is internally fused, check the fuse.
The fuse could be blown.
4.2

Power-On Does Not Succeed

1. Turn off the system power switch.
4-2 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993
Troubleshooting Tips (Continued)
Action
If many SCSI devices are connected to the same SCSI bus and if some of
these devices are "fast SCSI" devices, you can install an FSBE/S SBus
card to the "fast SCSI" devices to speed up performance.
Replace the disk drive indicated by the failure message. The operating
system identifies the internal disk drive 0 (SCSI target ID 3) as sd0 and
internal disk drive 1 (SCSI target ID 1) as sd1.
The power supply may be defective. See Section 4.2.1 "Power Supply
Test."
The system board may be defective. See Section 4.2.2 "System Board
Test."