Vertical Hold Control - IBM Personal Computer XT Manual To Operations

Vertical Hold Control
Use this control (as described below) only if your
screen presentation is rolling from top-to-bottom or
bottom-to-top.
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Vertical Hold
Control
1
Set the system unit's Power switch and the
display's Power control to On.
2
Wait for the conpletion of POST.
3
Turn the Vertical Hold control clockwise as far
as it will go, then turn it counterclockwise until
the screen presentation stops rolling.
3-20 Displays