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You could start by reducing the brightness and/or contrast to see if that alleviates the problem. Blurring on CRTs is often caused by the tube being overdriven, although to be fair, this would more likely be across the whole screen rather than sides only. But try it nevertheless.
Failing that, it seems that the tube isn't focusing correctly and probably does need attention.
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Nigel Except on matters of forum moderation, the views expressed in this post are my own, and do not necessarily reflect the opinions of AVForums. |