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Sorry for your trouble.
Could you pls send a picture of SN at the bottom of the machine and your purchase record?
1.Please change another HDMI cable or power supply.
2.Please unplug the power supply and HDMI cable. Please try to hit the hole of "CLR CMOS" with a needle or a pin for about 5-10 seconds.Ten minutes later, plug the power supply and HDMI cable, turn on the PC again.
3.There might be something wrong with the hard ware components.Please take out the SSD and RAM and then put them back , make sure they are installed properly.
Also please clean the gold finger with a rubber.Here is the tutorial https://www.youtube.com/watch?v=hEd_7nmWVOk
If it still doesn’t work, please press delete key as soon as you turn on the PC, so that you can go to BIOS, please check you can see SSD there.
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