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Old 08-22-2013, 07:32 AM
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zeno zeno is offline
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Join Date: Mar 2013
Location: New Hampshire
Posts: 4,918
Call the cleaning lady first.
Dirty IC sockets on one of the color modules.
Dirty APC control.
Dirty norm-align switch on TOP of chassis.
Dirty chromatic switch.
This is assuming no large changes in grey scale.

73 Zeno
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