There are several posts about an external microphone not working, but none of them is an exact match.
I am trying to connect an external microphone (Bietrun UHF Wireless) to HP EliteBook 840 G8 with Windows 10 Pro (build 19044). The device manager says that the Realtek Audio input driver is working properly. However, the test says that the microphone is not connected.
The microphone works just fine on another laptop (from Dell). The 3.5mm jack works with headphones. I don't have another mic to try.
I tried reinstalling the driver without a result. The BIOS test does not recognize the mic either.
I called HP support. They said that, since the 3.5mm jack works with headphones, it's not a hardware problem.
What steps can I check to fix this?
Another detail: When the Realtek driver is not installed and I put in the mic, it sometimes adds the Realtek driver to the output devices, i.e. it is sure the mic is headphones. Then I manually add Realtek to input devices (tried also disabling it in the output devices), but the mic is still not working.
