Visara 1486 - Manual (Page 92)

6-6 701334-002
Problem Determination and Maintenance
STEP 4. Is the display screen completely dark?
NO YES Reset the Contrast control and, if present, the Brightness control. If
the problem still exists or the display needs frequent brightness
adjustments, replace the Display/Logic element.
STEP 5. Is there an alpha or alphanumeric 2-digit error code displayed on the operator
status row of the display?
NO YES Refer to “Hardware Failure Error Codes” on Page 6-2 and perform
the indicated recovery procedures.
STEP 6. Does the display exhibit a recognizable problem like those listed below?
• Display area drifts horizontally or vertically.
• Characters are fuzzy, out of focus.
• Display area is noticeably reduced or expanded.
• Display area is tilted.
NO YES Replace the Display/Logic element.
STEP 7. Enter Test mode as described in “Testing the Display Station” on Page 3-35.
Does the display match the screen in Figure 3-15 on Page 3-35?
YES NO If there is a display problem, go back to Step 6. If not, continue on
to Step 8.
Go to Step 8.