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Troubleshooting Symptom Charts/Video - 12
Thin white line is
always on at middle of
screen
1 PowerBook 1400cs:Thin white line is normal.
2 PowerBook 1400c: Change the desktop pattern; if the line
remains, replace display.
An external monitor
connected to the
PowerBook shows no
video
1 Verify cable and cable connections between monitor and video
board.
2 Reseat video board and retest.
3 Replace video board.