Did you try cmd+V and did you see any I/O error messages?

Regards

Sam

--
MacAmbulance
Sam Mullen
07747778022
[email protected]

> On 22 Dec 2014, at 12:04, Derek Cross <[email protected]> wrote:
> 
> Hi Sam
> 
> Thanks for that.
> 
> I tried all your suggestions (apart from replacing my drive), without success.
> 
> I was able to start it successfully with a safe boot (Shift after start-up 
> sound), and was then able to use Utilities > Verify and Check Disk (no 
> problems) and Verify and Repair Disk Permissions successfully, but when I 
> restarted it after this it was back to the white screen and spinning beach 
> ball.
> 
> Is that it, do you think?
> 
> Cheers,
> Derek
> 
> 
>> On 22 Dec 2014, at 10:48, Derek Cross <[email protected]> wrote:
>> 
>> Many thanks Sam - will try and report back. Keeping my fingers crossed!
>> 
>> Luckily, last night I backed up the important job I was working on to an 
>> external drive.
>> 
>> And a Merry Christmas to all.
>> 
>> Derek 
>> 
>> 
>>> On 22 Dec 2014, at 10:46, Sam - MacAmbulance <[email protected]> 
>>> wrote:
>>> 
>>> Could be a bad block on your hard drive, try rebooting holding down CMD + V 
>>> on the keyboard, the screen will go black with white text and you might see 
>>> the message “disk 0s2 I/O error”, if you see that then it’s time to replace 
>>> your drive.
>>> 
>>> If you don’t see it, try rebooting holding down CMD + alt + P + R until you 
>>> hear the startup chime a second time, then release. If that doesn’t help, 
>>> try shutting down, remove the power cable for 30 seconds then boot back up 
>>> again. If that doesn’t help try CMD + R to boot to the recovery partition 
>>> and reinstall OS X.
>>> 
>>> Regards
>>> 
>>> Sam
>>> 
>>>             
>>> MacAmbulance Ltd.
>>> Providing Affordable Mac/PC Support and Web Development
>>> 
>>> Sam Mullen ACMT
>>> +44 (0)7747778022
>>> [email protected]
>>> www.macambulance.co.uk
>>> MacAmbulance Ltd. is a registered company in England & Wales, registration 
>>> number 8466597
>>> This email is intended solely for the addressed recipients and may contain 
>>> privileged or confidential information. If you have received this email in 
>>> error please notify the sender and delete the email immediately.
>>> 
>>>> On 22 Dec 2014, at 10:34, Derek Cross <[email protected]> wrote:
>>>> 
>>>> Hi Smuggers
>>>> 
>>>> I started doing some Photoshop work on my iMac this morning when the 
>>>> system suddenly froze. I turned off the iMac by pressing the close down 
>>>> button at the back of the Mac. Now when I restart it I get a white screen 
>>>> and the revolving globe thing.
>>>> 
>>>> What do you suggest I should I do to start it?
>>>> 
>>>> Thanks
>>>> Derek
>>>> 
>>>> (OS 10.10)
>>>> 
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