DEC DECstation 316+ Service Manual page 43

Table 2–7 (Cont.) Monitor Troubleshooting Procedures
Problem
Screen display
distorted, rolling,
flickering, or wrong
or uneven color.
Screen displays
distorted images or
goes blank when you
run the software.
Screen displays
partially highlighted
characters.
You have a color
monitor and
the display is
monochrome.
Possible Cause
Monitor cable
connector pins bent
or broken.
Electromagnetic
interference exists.
Software is not
configured for, or is
incompatible with,
the current settings
of the VGA board.
Main logic board
VGA board jumpers
incorrectly set.
System was turned
on before turning on
the monitor.
Troubleshooting 2–19
Corrective Action
Straighten pins or
replace the monitor.
Move any
electromechanical
device away from the
monitor or move the
monitor.
Reconfigure the
software for VGA
or set the VGA jumper
on the main logic
board to a standard
supported by your
software. See the
software and VGA
manuals.
Make sure the VGA
jumper is enabled on
the main logic board.
If so, replace the main
logic board. If that
doesn't fix the problem
replace the monitor.
Turn off the monitor
and system. Wait at
least 20 seconds. Turn
on the monitor, then
the system unit.