kimjio
Hello,
Sorry for the trouble.
Don’t worry, the PC has one-yea-warranty.
Here are some potential solutions:
First,Please turn off the PC , unplug the power supply, and press the CMOS button (if no CMOS button, please put the pin in the CMOS pinhole and press it ) for about 10 seconds , restart the PC after ten minutes. Here is the tutorial https://mega.nz/file/XypwTISY#DVT0BsjOgiPkZ-drQaj88JH9Z7f7qpKGP2E3nMHW8ms or https://url.bee-link.cn/5FdW
If the problem persists, please try other solutions: Please change another HDMI cable or power supply.
Best Regards!
Wendy
Customer Support