View Full Version : Prime Z490-A unlabled headers

05-03-2021, 09:50 PM
Does anyone know exactly what the 2 unlabeled headers are for, maybe an LPC and TMP header?

The first on is just behind the M2 (WIFI) slot. It's a 2 x 5 with 1 pin missing.

The second is next to the power button on the board. It's a 2 x 5 with 1 pin missing.

Neither are mentioned in the manual at all.

05-04-2021, 09:12 PM
Hello, please provide image of the pin? It might be for repair service only

05-04-2021, 10:01 PM

I am sure they are for repair service, what bus or protocol do they use?

05-21-2021, 11:16 PM
the one pictured next to the m.2 is the spi(bios) service header ..

06-25-2021, 06:33 AM
Hi there,
Sorry for our late confirmation.
Both of the headers are for service, so that's why they are not labeled.
One is for installing BIOS and one is for debug.
Thank you very much.