When you purchase from a cheap brand; but its products has a premium price tag... WELP! 😏
My experience with a Zotac mini-pc 15 years ago wasn't stellar either.
Never again.
By the looks of things the person may have damaged the gpu pci connectors when he removed it.
That said, he can still demand that they fix the fan and send it back assuming he thinks it is still in working condition.
isnt this the same design flaw as here ?
www.notebookcheck.net/Nvidia-RTX-5090-Founders-Edition-teardown-reveals-fragile-modular-design-that-repair-experts-call-a-disaster.1147864.0.html