DEC DECstation 316+ Service Manual page 42

2–18 Troubleshooting
Table 2–7 (Cont.) Monitor Troubleshooting Procedures
Problem
Screen goes blank
after successful
power up; monitor
LED is off.
Monitor LED is off,
but display is OK.
Monitor is on, but
no cursor or text
displays.
Possible Cause
Main logic board
failure.
Power or monitor
failure.
Faulty LED.
System is not on.
Contrast control is
set to minimum.
Main logic board
failure.
Corrective Action
Replace the monitor.
If that doesn't fix the
problem make sure
the VGA jumper is
enabled on the main
logic board. If it is
enabled, replace the
main logic board.
Turn the monitor and
system off. Disconnect
the monitor from the
system and wall. Plug
the monitor into an
working wall outlet. If
the monitor LED does
not turn on, there is
a problem with the
monitor or monitor
LED.
Replace the monitor.
Turn on the system.
Turn up the contrast
control.
Replace the monitor.
If that doesn't fix the
problem make sure
the VGA jumper is
enabled on the main
logic board. If it is
enabled, replace the
main logic board.