There is a 4 wire cable that goes from the CRT yoke to the analog board.
Look for discoloration around that connector on the analog board.
Also, disconnect the cable from the analog board and look for discoloration
in the white connectors.
Discoloration indicates poor connection that is causing overheating, which
causes intermittent connection.
Fixable by either resoldering the 4 connections on the analog board or
replacing pins in the connector(s)

Gamba
<http://home.earthlink.net/~gamba2>


>The screen on my SE is very rocky. It is perfectly bright and clear but
>the picture seems to stretch and contract around various areas. I also
>get bad interference from the floppy and hard disks. Is the analogue
>board dying? Have I got my screen adjusted badly? It seems too long and
>thin. I don't think it's the tube (or at least i hope not!!).
>
>I am busy installing some software from floppies and the screen is
>getting bad striping and is  jumping about a lot.
>
>
>--
>Mark Benson



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