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USB/Ethernet/all ports not working

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The USB/Ethernet/all other ports on the back of my iMac have stopped working. I plugged a USB cable in and it touched a lamp with a short--it arced and now the USB and Ethernet don't work. The computer boots seems to work fine, but I can't interact with it via keyboard/mouse/ethernet. The airport is off so I can't try connecting via wifi.

My guess is the bus with the ports has been fried. Is this on the logic board, or is it a separate board that's easier to replace?

In addition, any ideas on how to connect/interact with the computer without the use of USB/Ethernet/Wifi?

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mayer
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You're probably looking at having to replace the logic board. You may be able to get to the bluetooth by disconnecting your keyboard and starting up.

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pierrej
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if you have a bluetooth module, you can try using a bluetooth mouse and keyboard. your imac should ask you pair a keyboard and mouse if you have the bluetooth installed.

as for the damage, the ports are part of the logic board. i have never seen the come seperate. i would have to say

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