Mysterious Unknown Logic board in Quicksilver

Discussion in 'Mac Pro' started by jvbonanno, Sep 26, 2011.

  1. jvbonanno macrumors newbie

    Sep 26, 2011
    I have been repairing, upgrading, and using macs since the IIc days, I recently bought an extra quicksilver 933 for a project and I am stumped, it has a Motherboard 820-1417-A and in all other quicksilvers I am used to 820-1276-A (32 bit addressing / max hd 128GB) or 820-1342-B (large HD support).

    This strange motherboard 820-1417-A does support 48 Bit addressing (HD greater than 128GB), however it does NOT boot to the Mac Diag 1.21 that works with all 2002 quicksilvers and MDD models; anyone ever had one of these boards ?

    There are no google hits except a few other people selling them ?
  2. flatfoot macrumors 65816

    Aug 11, 2009
    You'd probably get better support in the correct forum section.
  3. Consultant macrumors G5


    Jun 27, 2007
    Maybe someone put a different MOBo or processor in it.

    Maybe it's prototype.

    You can probably find out more with model / serial on the back and what About Mac brings up.
  4. pewra macrumors regular


    Jun 26, 2011
    Additionally, prototypes typically have different coloured PCB dye.
  5. MacTech68, Sep 26, 2011
    Last edited: Sep 26, 2011

    MacTech68 macrumors 68020


    Mar 16, 2008
    Australia, Perth
    Possibly a "QuickSilver 2002ED", an education only model. These also support 48bit LBA mode.

    The only difference I can glean is that the QS 2002ED use cable select on the ATA bus.

    Sold in 733 & 867Mhz.

    I wonder if the machine works with a 933 CPU, but won't boot the diags, but would boot the diags if it had a 733 or 867Mhz CPU fitted. Just a guess.

    EDIT: AHT v1.2.6 should work with these

    Not sure which ASD works, possibly only runs MTP Dec 2002 v7.7

  6. jvbonanno thread starter macrumors newbie

    Sep 26, 2011
    Thanks MacTech68,

    I was also thinking the same thing since I always heard about ED units, but never saw one; I never imagined the main board would be different; I thought the ED units had a different ROM or small difference, at any rate....

    Update: Motherboard definitely is original and if it was a prototype it would be RED, not green, if it was an MDD it wouldn't fit and it would be blue, if it was some older QS it would not support large drives; so I am favoring Mactech68, it must be an ED unit even though model number and white sticker looks identical to a 933 standard unit; although, it could be that the original MB died and a 2002ED logic board was replaced in a standard 933

    It does boot and pass Techtools Apple test
  7. MacTech68 macrumors 68020


    Mar 16, 2008
    Australia, Perth
    Here's another thing to check:

    Compare the serial number on the rear of the case with the serial number listed in Apple System Profiler. If they are the same, then it's the original config. If the serial number is missing in Apple System Profiler then it's had the motherboard replaced via Apple Service. If the serial numbers are both present but DON'T match then somebody has built it from parts. Also, the serial number label should denote the original video card shipped. 2002ED models only shipped with CD-RW

    What machine ID is this beast? PowerMac3,5 AFAIK is the same for QS, QS2002 and QS2002ED.

    Also, the last three characters of the serial number denote it's model/configuration, but I've never seen a definitive listing.
  8. kbfr08 macrumors 6502

    Mar 16, 2007
    There's a quick way to tell if its prototype or not, could you post the serial number? They're usually nonstandard, but sometimes look like production S/Ns , so I really can't explain how you could tell.

    For the record, later prototypes have blue, green, black, etc circuit boards. Red boards are usually reserved for EVT, blue or green is for DVT or PVT (production)
  9. jvbonanno thread starter macrumors newbie

    Sep 26, 2011
    Thanks again for the info:

    I am on the same wavelength, I checked that before I saw your post and it matches, so the board is original. The unit is at home now but I will run the serial to see if any site's mention anything about 2002ED and I will check the sticker again to see if it says CD-RW

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