IBM 3205 Maintenance Information page 38

SYMPTOM 17.
The display appears to be rolling from top to bottom or from bottom to
top.
ACTION:
l.
2.
3.
4.
5.
6.
7.
Set the I/O switch to 0 (Off).
Make sure the video cable is firmly connected to the logic unit.
Set the I/O switch back to I (On).
Turn the security key and the Brightness Control knob fully clockwise.
Make sure the Power-on light is on.
Set the Test/Normal switch to Test.
Does the symptom disappear!
NO
Go to step 8.
VES - -
Return to normal operation.
8. Is the Status light continuously blinking!
NO -- Replace the logic board.
VES - -
Replace the video unit.
Status Light
Figure 2-12. Status Light
2-14 IBM 3205 Color Display Console
Go to 3.2, "Logic Unit" on page 3-2.
Go to 3.3, "Video Unit" on page 3-6.
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