Problems starting after installing memory

I just upgraded the memory on my iMac 27 "end 2010 exchanging modules of 2 x 2 MB for 4 x 4 mb. I bought the original Samsung memory to a Mac (Mac Speicher Shop in Germany) hardware store and follow the instructions to the letter. My mac started fine initially then just as he made the JPEG format on the desktop all the * broke loose! I got a screen gray, followed by the progress bar which came on 2 - 3 times. I presume that the modules have not been installed correctly then extinguished and are returned at the beginning and removed modules and put them in ensuring that they "clicked" on the insertion.

When the computer reboots, I have a tone of apple gray screen and then the progress which was suddenly replaced with script the only bit bar which I managed to read before disappearing was panic at startup.

Now I have a constant gray screen with the apple logo that goes no further.

Anyone has any suggestions on what to try next please?

Re-install the original RAM and restart the computer. If the computer works fine then return the RAM was purchased and purchase the correct RAM to be Crucial (direct purchase) or buy OWC at www.macsale.coms. iMacs are VERY sensitive to the RAM, the two providers offer high-quality RAM that just works.

Tags: Mac

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