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This Power Mac G4 has Mirrored Drive Doors.

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Mac dont boot with mouse or keyboard conected.

When i power on the mac with the mouse and keyboard coencted to USB the MAC don´t start and tell me a setup USB error. If i disconect the USB mouse and keyboard the computer boot fine, but if i conect the USB mouse or keyboard the computer give me a screen with "you have to restart the computer", restart and don´t boot again.-...please help!!! i thought this was caused by damage on the logic board, so i buy one on ebay, replace it and the same problem again. Maybe it is somewthing with software or OS, but i can´t do anything without a mouse or keyboard!!!! please help me!!! don´t know what to do

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Change the keyboard and mouse, they may be trying to draw to much power.

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If you have access to another PowerPC based mac, retrieve your harddisk from your G4 and connect it to the other mac. Do a clean install on it and see if that fixes your problem. Otherwise a PCI USB card may do the trick, but you already tried two logicboards, so i'd rule out a software error first.

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pablo will be eternally grateful.
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