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Thread: Self Test issue

  1. #1
    Member pnauts's Avatar
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    Self Test issue

    Hi,

    with the color bars test, the blue color is green but all is fine in game, SFIX ROM is ok.
    Any idea ?

  2. #2
    Member pnauts's Avatar
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    another slot have this problem.
    half the color bars than a normal slot and strange 1st bar (problem in game also)



    RAM 4364 had been changed, the LS273 are ok.
    I suspect the NEO-GO in C7 location.
    Last edited by pnauts; 11-04-2017 at 03:44 PM.

  3. #3
    Member pnauts's Avatar
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    NEO-G0 changed, still the issue, any idea ?

  4. #4
    Member pnauts's Avatar
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    NEO-ZMC2 changed

    in game:


    unibios Menu (SNK logo missing)


    Neo-IO ?

  5. #5
    Member pnauts's Avatar
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    I requested account to add pinouts on neo-geo wiki (PRO-C0) but without success. If someone is in touch with people which can know why ?
    And up for my problem. I wish avoid to change Pro-B0 or Pro-C0 for nothing

  6. #6
    Member pnauts's Avatar
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    with SMKDAN EPROM


  7. #7
    JammaNationX
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    Why did you change the ZMC2? Its affecting the motherboard without cart.

    If 273 is good, might be the C0. Any errors reported with the smkdan?

  8. #8
    Member pnauts's Avatar
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    I had one dead pixel output on the ZMC2, now it's ok on this point.
    for the issue, FIX of the game test don't have the blue color inside.
    there is no border color on the crosshatch, just the white part grid.
    All tests passed with SMKDAN, controller, RTC, memory card detection, ram test loop...
    I don't know precisely how are generated colors bars, but I think it's either the 4 low Palette bits of the C0 (could result in 16 colors steps) either a combination with the B0 and its upper bits palette.
    Is someone can confirm if the LSPC-A0 is out of concern ?
    with the original Eprom, just after the RTC garbled green screen, It's stuck in a solid plain green.
    all pins of 273 seems active but I'll cross the set.
    Last edited by pnauts; 11-15-2017 at 04:05 PM.

  9. #9
    Member pnauts's Avatar
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    PRO-C0 changed, same problem.
    for me it remain NEO-IO, 1 x NEO-E0 on multiplexed internal bus and the PRO-B0.
    I don't think it's the LSPC-A0

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  11. #11
    Member pnauts's Avatar
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    yes, but I have only the plain grid, no color on the border just empty sides.

  12. #12
    Member pnauts's Avatar
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    colors bars fixed with the change of the Neo-B0 but still problem in game, I think the Neo-C0 I'd changed works less well than the previous one.

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