Iscan pro scaler problem

[scott33b]

Hi. Can anyone help with a problem??. When the Iscan is set to RGB I get an offset band about 6" wide at the top of the screen, which I can only describe as a squiggle. When I switch the Iscan to YPbPr the picture is perfect except it is very green.
The Iscan Pro is second hand, but in excellent condition.

[BertM]

You could try to set the synch signal to a different type, it's now probably set to Bi-Level or Tri-Level, set it to composite or any of the H/V options.
(Output Setup -> Sync Type)

Good luck!
Bert