Probleme with 30" cinema display

Discussion in 'Mac Pro' started by parisinvest, Jan 19, 2019.

  1. parisinvest, Jan 19, 2019
    Last edited: Jan 19, 2019

    parisinvest macrumors regular


    Dec 24, 2017
    hello you all,
    I've recently found a problem with my 30" cinema display, but I don't think it's my monitor has a problem, don't get a clue, so post here to see if have any experienced an explanation:

    with some sapphire 280 /flashed 7950 only model with 3 points blanc / and MSI 280x dragon TF flashed mac card, I've flashed them in the same way with others, and i'm pretty sure they are not exotic cards, the 30" monitor shows only 1280x resolution maxi on hdmi and displayport video ports, dvi start with boot screen, then black screen before login, can't modify resolution from system preference

    1, pram, doesn't change
    2, change cables, doesn't solve the problem
    3, connect to cinema display 27" and 23", all normal with no problem
    4, change other flashed cards: 280/280X/7950/7970 on 30", no problem at all
    5, change to original rom with 30", no problem at all
    6, put back the card on pc, no problem neither

    so any one can tell where the problem is?
    many thanks



    Capture d’écran 2019-01-19 à 14.24.11.png
    Capture d’écran 2019-01-19 à 14.24.27.png
  2. parisinvest thread starter macrumors regular


    Dec 24, 2017
    search from flash program side, updated to python latest version, but still found this while flashing:

    OpRom (size=65536, indicator_offset=0x241, indicator=0x0, checksum=0x0)

    OpRom (size=48128, indicator_offset=0x31, indicator=0x80, checksum=0x0)

    RawData (size=17408)

    Traceback (most recent call last):

    File "", line 110, in <module>


    File "", line 90, in fix[-1] = chr(0x100 - sum)

    ValueError: chr() arg not in range(256)

    the last line has a error, what should cause this? other flash doesn't have this

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