Hi All, Have a G5 2.0ghz DP (A1047) running Leopard 10.5.8. Recently it developed a strange bug which I think must be hardware related. The mouse is plugged into the keyboard and the keyboard is plugged directly into one of the rear USB ports. When booting with the Option key held down to select an alternate startup drive (firewire external), I get no mouse or keyboard action (I get a mouse pointer but it does not move). The mouse laser does not light up. However when allowing the system to boot off the default internal drive and come up into the OS, the mouse and keyboard work fine. In both cases I can see the mouse flash twice during startup then it goes off. When booting into the regular drive, the mouse laser then comes back on. I have tried resetting the PRAM several times, tried different USB port, unplugged other USB devices, pressed the SMU button on the motherboard, powered off and unplugged the machine then held the power button down. None of these things have made a difference. I tried the external drive, mouse and keyboard on another G5 and everything works perfectly, plugged in the same way. Being that the USB port works under OS control but not under firmware, could it be a case of corrupted firmware? I admit I am stumped and have worked on Macs for years. Never had this problem before. Any ideas? Yes I have googled this and found some similar reports, but nothing that really helped. Thanks!
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