Thank you for all the help. I took the iMac into Xite Logic and the USB -part 
of the Mother board was the problem. Too costly to fix. So I will have to wait 
until I can afford a new iMac.
Well done for the support

tom samson
On 10/06/2012, at 9:42 AM, tom samson wrote:

> yes. maybe it time to find a tech to fix it . but first i ma looking for a 
> file i can trash that may be corrupted. or go to terminal [a first]. any 
> ideas [sorry cannot get question mark.
> tom samson
> On 09/06/2012, at 6:10 PM, tom samson wrote:
> 
>> my iMac can not find keyboard typing from keyboard viewer. need help tom 
>> samson
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