I understand Severin. 
Let's hope you find the correct screwdriver or I could send/lend one down to 
you.

Sent from Ronni's iPad4


> On 25 Jun 2014, at 5:17 pm, Severin Crisp <sevcr...@westnet.com.au> wrote:
> 
> Good advice Ronni but I believe my problem has been unsuitable screwdriver 
> rather than seriously stuck screws.  The physical problem to take the iMac in 
> to T4 is off putting!
> Severin
> 
>> On 25 Jun 2014, at 5:10 pm, Ronda Brown <ro...@mac.com> wrote:
>> 
>> Yes that is correct... It is now 14 pieces. I've had my set for probably a 
>> good 15+ years ;-)
>> 
>> If you are having trouble loosening the three screws, sometimes the space 
>> between the internal threads and the screw threads capture moisture and 
>> oxidation occurs. If this is the case attempting to remove the screws will 
>> possibly strip the head. If this happens you will have to replace the 
>> screws. 
>> If you are finding the screws difficult to loosen I would take the iMac to 
>> an Apple Authorised technician and let them loosen them. They have more 
>> experience and if the screws are ruined they will be able to replace them.
>> 
>> Cheers,
>> Ronni
>> Sent from Ronni's iPad4
>> 
>>> On 25 Jun 2014, at 4:58 pm, Severin Crisp <sevcr...@westnet.com.au> wrote:
>>> 
>>> I see that that Newer Tech kit is now 14 pieces
>>> Severin
>>> 
>>>> On 25 Jun 2014, at 4:38 pm, Ronni Brown <ro...@mac.com> wrote:
>>>> 
>>>> Hi Severin,
>>>> 
>>>> Remember that the screws are captive - they only loosen, they remain with 
>>>> the cover - so it won't be noticeable that they are unscrewed until the 
>>>> cover comes off.
>>>> 
>>>> I purchased many years ago and still use today, a Newer Technology 
>>>> 11-piece Portable Toolkit which includes:
>>>>    • Three Torx screwdrivers (T6, T8, and T10)
>>>>    • Two flathead screwdrivers (1.8mm and 3.0mm)
>>>>    • Two Phillips screwdrivers (#00 and #2)
>>>>    • Two nylon spudgers—otherwise known as pry tools, useful for opening 
>>>> iPods or Mac minis or removing the top case from an older MacBook Pro.
>>>>    • A set of large tweezers, perfect for fishing out the screw you 
>>>> accidentally dropped into the innards of your laptop
>>>>    • A scissor clamp for holding cables and other thin objects in place.
>>>> 
>>>> I would be lost without this little set of computer tools.
>>>> 
>>>> Cheers,
>>>> Ronni
>>>> 
>>>>> On 25 Jun 2014, at 4:17 pm, Severin Crisp <sevcr...@westnet.com.au> wrote:
>>>>> 
>>>>> Thanks, Ronni.  All my reading came up with Phillips but unspecified 
>>>>> size.  I suspected they might have been torx but definitely not.  I will 
>>>>> go back to my selection and try again.  
>>>>> Best wishes and thanks
>>>>> Severin
>>>>> 
>>>>>> On 25 Jun 2014, at 3:45 pm, Ronda Brown <ro...@mac.com> wrote:
>>>>>> 
>>>>>> Hi Severin,
>>>>>> 
>>>>>> If your iMac is  21.5" Model A1311 or 27" A1312  you can use a Phillips 
>>>>>> #2 screwdriver to loosen the three captive screws on the memory access 
>>>>>> door.
>>>>>> TURN them COUNTERCLOCKWISE
>>>>>> Then remove the memory access door and set it aside.
>>>>>> 
>>>>>> Cheers,
>>>>>> Ronni
>>>>>> 
>>>>>> Sent from Ronni's iPad4
>>>>>> 
>>>>>> 
>>>>>>> On 25 Jun 2014, at 2:08 pm, Severin Crisp <sevcr...@westnet.com.au> 
>>>>>>> wrote:
>>>>>>> 
>>>>>>> I have a Late 2011 iMac 12,1 and have purchased modules to go from 8GB 
>>>>>>> to 24GB ( thanks Daniel).  Today I duly shut down, unplugged everything 
>>>>>>> from the back (including a struggle as always with the ethernet plug) 
>>>>>>> and laid the Mac out flat on a towel.  Various of the online “how tos” 
>>>>>>> list the simple procedure starting with a Phillips screwdriver to undo 
>>>>>>> the three small screws that secure the cover.  But not so easy.  I have 
>>>>>>> several Phillips screwdrivers which look as if they are correct but do 
>>>>>>> not catch.  Closer inspection shows that the screwheads have only a 
>>>>>>> shallow indent so a normal Phillips, which has a bit of an extended 
>>>>>>> point, does not apparently go in far enough to engage.  Not wishing to 
>>>>>>> damage screwheads I put it all back again and still have 2 x 8GB 
>>>>>>> sitting on the desk looking at me expectantly.  Has anyone else tried 
>>>>>>> to follow this seemingly straightforward operation and had, or not had, 
>>>>>>> similar problems?  Are they really Phillips screws or something that 
>>>>>>> just looks like them?  I have had similar situations in the past.  
>>>>>>> Advice please!  
>>>>>>> Severin Crisp
>>>>>>> 
>>>>>>> ____________________________________________________
>>>>>>> 
>>>>>>>              Assoc Prof R Severin Crisp, FAIP, FIP, CPhys
>>>>>>> 15 Thomas St, Mount Clarence, Albany, 6330, Western Australia
>>>>>>>                   ph (08) 9842 1950 ( Int'l +61 8 9842 1950)
>>>>>>>                            mail to: sevcr...@westnet.com.au
>> 
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