GMKTec G9 mini PC wont start

• NUCBox G9
• fail
• defective

• w

  wikesal806

  8/9/25, 3:57 PM

  I have acquired a GMKTec G9 mini PC about 2 months ago, and now it suddenly stopped working.

  It was working fine a couple of days ago while sitting idle. By the way, thermals were under control. Then, out of the blue, it simply turned off.

  The provided power supply is delivering 19v as expected, but the PC won't turn on at all. I even tried plugging my monitor's USB-C power delivery into the G9's other USB-C connector, but that didn't work either.

  I opened the unit to see if something was broken or burned, but everything appears to be fine. The attached video shows the problem. (https://files.catbox.moe/oiwxxj.mp4)

  So, I was wondering if any one has had this problem before.

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• j

  jorensanbar+gmktec New

  9/25/25, 6:22 PM

  I'm having the same problem. It's not a power adapter issue because I've already tested it with a certified LENOVO power adapter.

  The computer runs for a couple of minutes and then shuts down. The CPU temperature doesn't exceed 40°C, and as soon as it does, the power button doesn't work, exactly as in the video.

  The computer only worked for a month.
  
  Video: https://drive.google.com/file/d/1XBFpRK4KDISeNbI-3HStqwr5vnIYTX6L/view 

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