Imac wont shut down

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Hi,

I have an intel Imac running snow leopard.

I recently returned from a holiday to discover that it was completely dead, after opening it up I noticed there was a scorch mark below the PSU. I replaced the PSU and hey presto it came alive.

Only problem now is that it wont shut down, only reset. If I select shut down, it goes through the normal procedure then just resets rather than shutting down. If I select sleep, it goes to sleep then wakes again immediately!

I have reset the SMC but no luck

Thanks
 
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Your Mac's Specs
Mac Mini (Late 2014) 2.6GHz Intel Core i5 Memory: 8GB 1600MHz DDR3
Sad story there. I don't see a question, so I'll supply one: Is it under warranty?
 
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late 08 macbook 2.0 4gig 320hdd10.7.3 32 gig iPhone 4s
It may have been right up until he replaced the PSU.

Clay
 
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nope, I wouldn't have replaced the PSU had it been under warrenty. Any actual advice anyone?
 
C

chas_m

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Does this happen if you close all apps, but then (instead of shutting down) press and hold the power button for four seconds?

I'm asking only to gather additional data; this is NOT a good way to routinely shut down your Mac.
 

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