No Video Output On The System Monitor - Sun Microsystems SPARCclassic Service Manual

TABLE 4–1
Problem
Operating system does not
recognize disk drive at boot up.
No video output on monitor.
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.

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.
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
32
Troubleshooting Tips
(continued)
Action
Shut down the system. Verify that SCSI ID jumpers
are set correctly and that every disk drive on the SCSI
bus is set to a different SCSI address. Verify that the
configuration jumpers on the disk drive are set
correctly. See Chapter 9.
Verify that the power cord is connected. Use a Volt
Ohmmeter (VOM) to check voltages. See "No Video
Output on the System Monitor" on page 32.
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 "Power
Supply Test" on page 33.
The system board may be defective. See "System
Board Test" on page 35.