I have a Power Mac G5 2.5 and does not want to start up. When I push the front button the light does not want to turn on but the fans start and accelerate too much. What i can do???? 
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My Mac G5 dont start.
- Thread starter pedrobig23
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Unplug all your peripherals and try booting from the OSX discs by holding C. Also, if you have another Mac then try to get it to load into Target Disk Mode so you can back your data up.