The Amilo LA1703 uses the SIS 163U mini card. Since all my trials with a standard mini pcie wlan cards failed, I have decided to check the schematics of the Inventec E25 motherboard. There is a possibility to use instead of the mini pcie card a mini pcie to USB adapter and use a mini wifi dongle inside Amilo LA1703. I specially tested the below two products:
https://www.aliexpress.com/item/Min...l ... 14542.html
https://www.aliexpress.com/item/300...k ... 55808.html