Run a time machine backup with the Console app open, then you’ll be able to see 
(hopefully) the last thing running before it freezes. Either copy/paste or take 
a picture and send it to me, I’ll see if I can see what could be happening.

Usually a completely frozen screen is a RAM error or dodgy graphics card 
soldering, especially if you’ve got an NVIDIA GeForce 8600M GT.

Regards

Sam

                
MacAmbulance Ltd.
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Sam Mullen
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On 29 Oct 2013, at 21:42, Testcard <[email protected]> wrote:

> Hello,
> I upgraded to Maverick on its release,
> On my MacBook Pro 2.2ghz 15inch intel core duo 4gb 667 MHz. Initially I had 
> no problems then 'time machine' backups resulted in a frozen screen. I've 
> tried disk utility with no luck. Even that freezes on commencement with the 
> disk. I then erased the disk (stupid I now know!) but a fresh disk makes no 
> difference. I'm a bit desperate as I cannot see what the issue is. I also 
> reinstalled another Maverick in case the original might be corrupted. 
> 
> Any thoughts very welcome.
> 
> Adrian.
> 
> Sent from my iPhone
> 
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