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Date Posted: 17:42:40 07/11/01 Wed
Author: Jim Balhoff
Subject: screen problem and fix for hacked system 7.5.5

For anyone else wanting to run Mac OS higher than 7.1 on a Color Classic with a 575 logic board at standard screen resolution:
I followed S. Watanabe's simple instructions for modifying the System file so that it would boot a Mystic with no screen modification. System 7.5.5 appears to work fine, although I have found that if the monitor is set to black out after inactivity, it either comes back with a black and white striped pattern or not at all (requiring a restart). It turns out that replacing the Screen control panel (1.0.7) with that from System 7.1 (Screen 1.0.4) fixes this problem.

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