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Power Mac 7500

ExplorerZ

Well-known member
I'd suggest trying to borrow or buy a working 7500 PSU. Converting an ATX could lead to accidents if you're not confident.
I have a small budget, and no one to borrow from. How would I do it? Also side note, could my iici psu be used somehow?
 

macuserman

Well-known member
I have a small budget, and no one to borrow from. How would I do it? Also side note, could my iici psu be used somehow?
I’m very close to you I’m sure we could work out a way to get together for some help. I’ve everything you need to test it.
 

fjm_48

Member
You may need to adjust those DIP switches. Try some of the settings for 640x480 or 800x600.

But it could be a marginal power supply. If there's no chime, and no video output, it is not starting.

If you have an ATX power supply, it could be adapted to TEST the machine with - but the pins are not directly compatible so you would need to map them to the 7500's power pins.


@Stinkerton18 put together a helpful guide here too https://docs.google.com/spreadsheets/d/1bKPddE9kDlInQ7N9fnO5qmQgvXjlHdIV0GcKRVskbZs/edit#gid=0
The spreadsheet shows the clip on the wrong side of the connector. It should be on the same side (top with respect to the PM motherboard) as the +5V trickle (yellow wire).
 
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