Logic board dings with no ram and doesn't with ram

I am wondering about a logic board that will ding when there is no ram in it and will not when ram is put in it. There has been several sticks of good ram tried in the logic board with no luck. What is the problem?

I found the answer.

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  • Kernel panics/crashes persistent, replaced HDD, RAM, Logic board

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    I have a 2010 white unibody macbook that for the first couple years of it's life gave me no issues whatsoever. Recently, I upgraded from snow leopard to mountain lion and replaced my stock apple 2G RAM for two 4G sticks I bought brand new. Everything ran great for a month or two, the memory was recognized right away, and worked fine (activity monitor displayed everything no issue whatsoever) even running a bootcamp partition, and doing lots of more memory heavy stuff like video editing.
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    I booted from a USB OSX 10.8 install disk I made a while back and ran disk utility to try and repair the disk. Disk utility told me it was fine. I backed up and erased the disk, and tried to re-install.. but the primary process would fail some 4 minutes into the progress bar with no error report.
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  • Time Machine doesn't recognize old sparsebundle after new logic board

    Installed new logic board in pre-Isight 20" iMac due to capacitor swelling and kernel panic. I had also erased the internal HD. I was able to restore all my files to internal HD from Time Machine backup on the 1TB Time Capsule. Now I'm trying to back up my restored iMac to Time Capsule, but there is insufficient space. Time Capsule has three sparsebundle files: one for the 20"iMac prior to new logic board, one for a Powerbook, and one for a newer 24"iMac. Time Machine wants to create a new sparsebundle for the restored iMac, but there is not enough room and I would like it use the residing sparsebundle so that I will have backups prior to the point the new logic board was installed. I tried just changing the name of the old IMac Time Capsule sparsebundle file to the new sparsebundle filename that Time Machine creates when attempting backup, but that did not work. Any suggestions?

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  • RAM upgrade MBP 7.1 fail.  Only stock RAM works.  Logic board problem?

    pulling my hair out here. 
    I have recently uprgraded my mid 2010 mbp to mountain lion and thought i would upgrade as much as i could but ran straight into frustration town.
    after a full day trying 8 different types and amounts of RAM, my MBP will only boot to a useable state with the stock ram it came with. 
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    secondary question:  anyone else notice a slowing down of operations with mountain lion?

    In your original post I got the impression that your MBP worked with the original RAM.  Apparently that was a misconception on my part.  My suggestions are to first run an Apple Hardware Test and see what clues, if any it offers:
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    You may have to start it by holding OPTION D.
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  • I bough a refurbished iMac last year, unfortunately Im in need of a Logic board, but when I search FD093LL/A, no company seems to recognize this model but I do see all models, or at least most, starting with MD...whats the difference?

    I bought a refurbished iMac last year, unfortunately I'm in need of a new/used Logic board, but when I search and contact Company with Mac parts, no one seems to recognize FD093LL/A witch makes it tough to identify parts, but I do see most Part Numbers starting with MD. Any reason why?
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    Refurbished models have a different order number. Replace the F with an M and see if the specifications listed match your computer’s.
    (115253)

  • What to do with old Logic Board

    Logic board from Mac Pro died and I have replaced the computer with a iMac.  Anyone know the best option to get some cash for the logic board? Any place that buys broken parts like this? 

    A dead logic board is not worth much. But a Mac Pro case with working power supply might be worth something.
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  • Can a faulty logic board kill a hard drive?

    Could Apple's faulty Logic Board be the cause of my iBook's HD demise?
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    Hi, and welcome to Apple Discussions. I'm so sorry to hear of your troubles.
    Truthfully, I would question whether the iBook with both a dead hard drive and another bad logic board is worth the cost of repair.
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    Good luck!.

  • What is the part number for my MacBook Logic Board?

    I have been searching through all of the Apple forums to help me with my issue. My issue is not knowing the partnumber for my MacBook Logic Board.  The sticker that is usually found on the ram slots is NOT there. 
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    Thanks Ahead of time.

    The wegenermedia reference relates to some earlier positive results others mentioned some years
    ago, and due to that, I sent an iBook computer to them, in a padded box (over-engineered) that I
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    Hi,
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    did you get your inverter board replaced already?
    Did you have a question?
    If the diagnostic in shop indicates same, thats 1000X better than anyone can do online in "diagnosis" (not really genuine diagnosis of course)

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