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The Macintosh Color Classic was the color all-in-one Mac in the early 1990's

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dark screen, but can hear it whirring and working

Hi!

I bought my husband a Macintosh Color Classic with tube and analog board, but no logic board.  He bought an “working” LC 575 Mystic Mac board off eBay. He installed it and turned it on, with the screen flashing an error sign, then it went dark.  You can hear it booting up, it whirls and beeps, but no screen.  He bought an original “working” recapped color classic logic board, but no luck.  Lots of info on recapping, etc, but no symptoms like his.  Do you know what problem this might be or whom we could ask?  Or where to send it for repair? Thanks

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Here’s a good source of info Mystic Upgrade

There is a bit of tweaking thats needed for the display to work properly with the LC 575 logic board. Did he make the needed changes? Its possible the flyback has failed on the CRT.

>> Be very careful <<

The CRT’s run on very high voltages which can hurt you!

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I think we will try to locate a flyback. We'd also like to find an along board and another tube, that way we can swap parts etc. Thank you for the suggestion.

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We really appreciate you taking the time to help.

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cynthia jenkins will be eternally grateful.
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