Repair guides and support for 27" Intel iMacs by Apple.

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One beep after SSD upgrade


I recently just attempted to upgrade my iMac 27 2010 by adding a SSD drive. However, upon boot up I keep getting a one beep error sounds. I read up that this could be a RAM issue but the RAM were working perfectly fine before the upgrade. I did notice some little metal thing on my desk after I closed up the iMac, perhaps it feel of the logic board, Im not too sure, I have included a picture.

Please let me know where this could have fallen off from and if you have any solutions.


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Look at your glass that covers the screen and see if a pin is missing.

Reseat your RAM and check to see if it is the correct type.

Please give us the last four figures of your serial number.

This machine may have had an Apple priority hard drive and replacing the drive may cause run away fan issues on the hard drive fan. Replace the old hard drive and see if the problem persists and get back to us.

Macintosh Beep codes.

1 beep = No RAM installed/detected

2 beeps = Incompatible RAM type installed (for example, EDO)

3 beeps = No RAM banks passed memory testing

4 beeps = Bad checksum for the remainder of the boot ROM

5 beeps = Bad checksum for the ROM boot block"

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