Digital Equipment DECstation 5000/100 Series, Maintenance Manual

Page: 88 / 392

How to Troubleshoot When the Diagnostic LED Display Is
0011 1011, 0010 1011, 0001 1011, or 0000 1011
If the system has no graphics module , use the troubleshoot-
ing procedure in the section ‘‘Troubleshooting when the
right diagnostic LED display is 1011 and the system has no
graphics module’’ on page 4-10 to troubleshoot.
If the system has a graphics module in one of the
TURBOchannel option slots
, use the troubleshooting
procedure in the next section to troubleshoot.
Troubleshooting when the right diagnostic LED display is 1011 and the
system has a graphics module
If a VT320 terminal is available ,
1.
Connect the terminal to the system unit. Refer to
‘‘Using an Alternate Terminal’’ in Chapter 2 for
directions.
2.
Remove any graphics modules installed in the system.
3.
Turn on the system unit and the alternate terminal.
4.
Type setenv console s and press Return. The system
then sets the alternate terminal as the console.
5.
Turn off the system unit power.
6.
Install the graphics module that you just removed from
the system.
7.
Turn on the system unit power.
8.
Use any error messages that appear on the terminal to
troubleshoot. Refer to ‘‘Troubleshooting When an Error
Message Appears on the Monitor’’ for directions.
9.
After you replace the failed FRU, type setenv console
*
and press Return. The system then returns to using
the monitor attached to the graphics module as the
console.
4–10 Identifying Failed FRUs