The Transpeed 6K is known for poor heat dissipation. If it works for 10 minutes then dies:
: The internal Wi-Fi adapter is known to be weak. For 6K/4K streaming, using an Ethernet cable via the LAN port is highly recommended to avoid buffering. transpeed 6k ultra hd not working
If you connected the box to a 4K TV but previously used it on a 1080p monitor, it might be outputting a resolution your current TV doesn’t support. The Transpeed 6K is known for poor heat dissipation