Greetings Everyone, As stated in MarckOliver first posting ---------------------------------------------------- As stated on the subject I have a Late 2008 20" iMac that suddenly (I turned it off one day and on in the next day) all USB ports, including Bluetooth that I think is on the USB bus, went dead. They have power (my iPhone charges connected to it and the Mighty Mouse lights up when connected). I've tried all sorts of mouses and keyboards and none work. Any ideas? ---------------------------------------------------- And in MarckOliver second posting ---------------------------------------------------- Since I am new to Mac computers, I don't really know what you are suggesting, but eve thought I figured it out I am unable to do it, since I cannot make any mouse or keyboard work... :( ---------------------------------------------------- Which only means that the kernel and inits have not completely loaded and made the mouse functional. However at sometime during the kernel loading process the USB port (not the USB ports on PCI slots) come to a monitored state.
Easy prof of this is to startup the platform in single use mode and note when the USB ports become available to the kernel. Another way to see that the USB port is monitored before the mouse and pointer become functional is to startup holding down the "Option Key" during startup, once the main USB ports come to a monitor state the kernel begins looking for all available "System folders" that can be use for startup. When found the startup up disk/folded is displayed on the screen. Therefore the my suggestions are may be valid. The only way to verify is to try. Cheers Harry Freeman San Jose, Ca On Nov 17, 7:26 am, Bruce Johnson <john...@pharmacy.arizona.edu> wrote: > On Nov 17, 2011, at 4:32 AM, gifutiger wrote: > > > > > Hold the mouse button down at startup (Mac OS 8 - Mac OS X) > > Restart or startup your computer. > > Hold down the mouse button immediately. > > Continue to hold the mouse button down until the CD ejects. > > Not a single one of those suggestions work on an imac with dead USB ports, > like the OP has. No USB, no Mouse. > > Some slot loaders have eject buttons on them; possibly all, but I don't have > a lot of experience with them disassembled.where they are depends on the > model, and these are a lot easeir to find if the system's disassembled, which > you're going to have to do to replace the bad logic board you have. > > -- > Bruce Johnson > University of Arizona > College of Pharmacy > Information Technology Group > > Institutions do not have opinions, merely customs -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to imaclist@googlegroups.com To leave this group, send email to imaclist+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/imaclist
