Tetramatrix
Hello there,
Could you please send us a picture of SN code(two lines) at the bottom of machine ?
Please repeatedly press delete key as soon as you turn on the PC, go to BIOS.
You can try to clear CMOS :Please turn off the PC , unplug the power supply and HDMI cable , and press the CMOS pinhole for about 10 seconds. Ten minutes later, plug the power supply and HDMI cable, turn on the PC again.
Please wait about one or two minute, if you can go to the system.
Please repeatedly press delete key as soon as your restart the PC, go to BIOS. Go to Boot option, enable fast boot, press F4 to save.
Here is the tutorial :https://mega.nz/file/XypwTISY#DVT0BsjOgiPkZ-drQaj88JH9Z7f7qpKGP2E3nMHW8ms
Have a nice day~