Sun Microsystems SPARCstation 4, Service Manual

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4-2 SPARCstation 4/Xterminal 1 Service Manual • January 1995
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.
Slow disk drive response. (Applies
only to the SPARCstation 4 system.) 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.
Read, write, or parity error reported
by the operating system or
applications. (Applies only to the
SPARCstation 4 system, or to the X
Server for a SPARC Xterminal 1.) Verify that the cable connections to the disk drive are fully seated.
Replace the disk drive indicated by the failure message. Solaris 1.x
operating systems identify the internal disk drive (SCSI target ID 3)
as
sd0
. With Solaris 2.x operating systems, the drive is identified as
c0t3d0
.
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. The power supply may be defective. See Section 4.2.1 “Power
Supply Test.”
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. The system board may be defective. See Section 4.2.2 “System Board
Test.”
TABLE 4-1
Troubleshooting Tips
Problem Action