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  1. #1


    Member Since
    Oct 13, 2007
    Posts
    2
    Memory Issue - Powerbook G4 1.5 Ghz
    Old memory config was 256K lower slot, 256K upper slot for 512K.
    When I added 1G to upper slot, system on recognizes total memory as 1G, say lower slot empty.
    When I put the 1G in lower slot and 256K in upper slot, system tells me I have 512K, also say lower slot empty.
    Any ideas as to why this is happening?

  2. #2


    Member Since
    Oct 27, 2005
    Posts
    4,702
    Quote Originally Posted by paulseto View Post
    Old memory config was 256K lower slot, 256K upper slot for 512K.
    When I added 1G to upper slot, system on recognizes total memory as 1G, say lower slot empty.
    When I put the 1G in lower slot and 256K in upper slot, system tells me I have 512K, also say lower slot empty.
    Any ideas as to why this is happening?
    I'm not saying this is exactly what is happening in your situation paulseto, but I think you should read the info at the following links as it may answer your question:

    Topic : Lower Memory Slot - Empty

    Powerbook showing 256 Ram?

    PowerBook Lower Memory Slot failure

    OS X Updates Damaging PowerBooks Lower RAM Slot (Updated)

  3. #3


    Member Since
    Oct 13, 2007
    Posts
    2
    Powerbook G4 - Lower Memory Issue
    Thanks Spawn Dooley,
    Problem exactly! Never even thought I had two 512 cards! I bought this used PB for my daughter from a University Grad / now PC Programmer. It looked new, no scratches anywhere. Advised by seller that he had never opened PB memory door and I took his word for it. I was actually planning on adding two 1 Gig memory cards, but decided to put one in first and see how it ran. After reading the DT's, I don't know if taking the PB to Apple is even worth doing with the poor results. Maybe, just have to live with 1 Gig in upper slot and hope programs don't freeze. Again, thanks for your help!!!! Paul

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