While they may be integrated into the same device, technically they are different adapters. The fact BT works says it is getting power but some other fault has developed.
I suspect you can still see the BT device in Device Manager.
I agree with softwaremaniac. While you can't swap out the surface mount (soldered) device, you can add another wifi adapter and use that instead. Tiny
micro wifi dongles are convenient - especially with notebooks and users who travel frequently. But their performance can be affected more easily due to lack of range. So I prefer adapters with
external antennas.