No Display (1 Of 4) - DEC VR297 User Manual

4
Troubleshooting

1.2.1 No Display (1 of 4)

DISPLAY THE CIRCLE CROSSHATCH SCREEN
SET THE S1 SWITCH ON THE A BOARD TO THE AGING POSITION
RASTER
ONLY
VERIFY THAT THE PROBLEM
IS NOT EXTERNAL:
1. CHECK THE VIDEO CABLE
FOR A GOOD CONNECTION
2. RUN THE SYSTEM
GRAPHICS DIAGNOSTICS
WAS THE YES
PROBLEM EXTERNAL
TO THE
MONITOR
STOP
NO
CHECK THE CONNECTIONS ON THE
B BOARD. IF THE CONNECTIONS
ARE GOOD, REPLACE THE B BOARD (3.8)
START
IS
THE POWER NO
LED ON THE
MONITOR
LIT
YES
1
ARE THE NO
CRT FILAMENTS
LIT
YES
4
WHAT NO
TYPE OF DISPLAY
VIDEO IS DISPLAYED
ON THE
SCREEN
RASTER AND
IMAGE REPLACE THE A BOARD (3.7)
5
DISPLAYED ON
PERFORM THE
A BOARD
ADJUSTMENTS (2.3)
SECTION NUMBERS ARE IN PARENTHESES.
3
2
IS
THE IMAGE NO REPLACE THE
H/J CONTROL
THE SCREEN BLOCK (3.12)
YES