disabled usb ports on imac core duo

[scubscub]

Hello, I just inherited an old imac and was trying to set it up.

Plugged in the keyboard and mouse, and a USB hub, turned it on and got an error message that the USB device was drawing too much power and the port would be disabled. Keyboard and mouse stopped working.

I then turned it off (which seems to have been my mistake), and when I turned it on again (without the USB hub this time) the keyboard and mouse continued to not work. I unplugged them and plugged them back in, no luck. I have since tried restarting the computer, with or without keyboard and mouse, etc., they will not work. I can't get past the login screen.

The mouse is optical and lights up when plugged in but will not move the cursor. Both the mouse and keyboard work on other computers.

I have seen advice on how to boot in safe mode, or reset the memory, etc., but all of these require a keyboard at the least -- is there any way I can fix this problem without a mouse or keyboard?

 

[flopticalcube]

Reset the SMC. Unplug the computer, hold the power button down for 10 seconds, replug and power up.

 

[scubscub]

Alas, no luck. I did get the power use error again though.


Could it be a memory issue? The person I got the computer from saided it needed more memory.

 

[flopticalcube]

Could be the hub, the mouse, the keyboard. Plug in just the keyboard or just the mouse and see if it works.

 

[scubscub]

Tried each alone, with no success.

 

[scubscub]

Well, from bad to worse. Now when I try to boot, I hear the drive spin but the screen remains black, and there's no chime.