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HP Z2 Mini G9 Workstation Desktop PC (4Y5Y9AV)
Microsoft Windows 11

I did a Windows 11 upgrade and shut down. The following morning the computer would not start. The power light comes on but nothing happens and the monitor cannot detect anything. After about 70 seconds the power light goes off. I've unplugged, re-plugged, hard reset, checked the cables, no luck. At one point I tried restarting it over and over but it got really hot at the back.

 

I took it to a local IT guy who tried it on his monitor, and he said it looks like it's trying to do something, but he won't look at it because it's still under warranty. Any thoughts/help would be much appreciated, especially if it saves me losing data on my hard drive (I'm self-employed and last backed up in April 😞   ).

Thank you.

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