r9 280 no picture and shorts coils

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  • ziko07
    Senior Member
    • Jun 2021
    • 99
    • Somewhere
    #1

    r9 280 no picture and shorts coils

    Hi, I have this graphic card no image, when power on fans spin but I measured and has only +12v from PCI and power 12v both connectors. also +5v linear present, 3v3 from PCI present. MCU is cold, then I I tried measure again and on coils, 1.5V,1v0, 1.8v, on mcu 0.8v all present and mcu slictly warmed up. After that I tried to put on motherboard and still no image, but now also all those voiltages missing again , only +12v present and 5v
    Then I measured (see image in red colour) and all those coisl has dead shorts, 0 ohm. I thing when first measuring voltage (I didnt check resistance) was also shorted, so what could couse them to be shorted?
    Any tips?
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    • ziko07
      Senior Member
      • Jun 2021
      • 99
      • Somewhere
      #2
      As I see both 1v0 and 1v8 goes to gpu maybe there is problem but once was all voltage ok,that's strange to me

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