Minisforum NAB 9 质量通知

I just got NAB-9 from Amazon.
After activation I installed Chrom browser and noticed that the screen constantly displays moving, floating lines like a waves on the surface of the water of different colors.
The display resolution is automatically set to 1920×980 by the system. And monitor working just fine with other computers I have.
That kind of things I did not expect from something advertised as computer build for 4K and HD resolution.
What should I do?

I purchased a UM680 slim model number MD486VU68QQMQC00023 FOR $232.74 with a 3 year extended warranty from Seel for $33.25. The computer does not work. I get a message on the monitor saying “No Signal” Please send me instructions on how and where to return this product. Thank you for your support and help

I purchased a MINISFORUM Mini PC NAB9 (Intel Core i9-12900HK, 32GB RAM, 1TB SSD) via Amazon on October 20, 2024 (Order #113-3959462-8044233). Unfortunately, the unit has suddenly stopped working. After researching online, I discovered that several users have reported similar issues, and I also found this your quality notice page. Could you please advise on the appropriate steps to get this issue resolved—whether through repair, replacement, or return under warranty?
Below are the order and product details for your reference:

Product: MINISFORUM Mini PC NAB9 (i9-12900HK, 32GB RAM, 1TB SSD)

Order Number: 113-3959462-8044233 (purchased via Amazon)

Purchase Date: October 20, 2024

Payment Method: Visa ending in 1661

Shipping Address: 17734 Moss Point Dr, Spring, TX 77379-7934, USA

Please let me know how to proceed and where to send the device if needed. I can provide photos or videos of the issue upon request. Thank you for your prompt assistance.