USB has power but do not recognize any USB device. (Nothing to do?)
Hello guys, I have an iMac 20" (Early 2008) and, about a month ago, I turned it off at night and in the next day as I turned it back on it booted fine but the mouse and keyboard (USB) wasn't working (besides the red led under the mouse were well lit) and from now on it doesn't recognize any USB devices (I can tell it has power because it charges my iPhone even though it does not recognize it on Mac OS). Bluetooth, which should an option, with a wireless mouse and keyboard doesn't work either (same USB bus?). I can boot to CD/DVD or external drives since the keyboard do not work and PRAM and SMC reset does not appears to work since the keyboard is not "present". That said, anyone has an advice (besides "change your logic board") for me on this? Thank you in advance!
I got a tip that it should be a Southbridge chip solder problem. I'm inclined to try to reball it with a hot-air gun, like I did in many xboxes and HP computer earlier. Is there a way to anyone point out where is the Southbridge on these iMacs logic board?
Is this a good question?