On May 3, 2013, at 1:47 PM, joe duran wrote: > 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.
The USB port(s) the keyboard and mouse are plugged into are motherboard port(s)? Are the mouse and keyboard Apple brand? Have you tried another mouse and keyboard plugged into the G5 in question. -- -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list --- You received this message because you are subscribed to the Google Groups "G-Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to g3-5-list+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
