Asus H81T - Stone All In One - Mitac M770 / M780

Problem

On some systems customers may repeatedly experience Realtek Audio Configuration Manager Popups within Windows even when no external audio device has been plugged in.

Symptoms also include:

Repeated Device or Audio notification sounds from within Windows.
The problem may persist even after rebuilding Windows or updating drivers.
Problems recording audio using the AIO Internal Digital Microphone and / or an external microphone.

Cause

This issue is caused because the AIO PC Internal Digital Microphone cable is connected to the Front Panel Audio riser on the Asus H81T motherboard.

The AIO PC does not use the (familiar) 10-1 Pin AAFP audio riser. Instead it uses a 4 Pin DMIC riser for the Internal Digital Microphone and a 2 Pin SPK_OUT riser for output to the speakers integrated into the AIO PC.

In addition when the DMIC cable is erroneously connected to the AAFP riser it will not fit correctly due to keying.

Note: This is likely a assembly fault and the problem will likely have been present from new. If the system has been in use for some time without experiencing the symptoms described, this article may not apply.

Resolution

Move the Digital Microphone cable from the Front Panel Audio Connector to the Digital Microphone Connector on the motherboard.

See Page 1-15 and Page 1-18 of the Asus H81T motherboard for riser locations.

Applies to:

SYSBRA-223 Stone M780 23.6" Non-Touch model fitted with the Asus H81T Motherboard (BOAMOT-471)
SYSBRA-227 Stone M780 23.6" Touch model fitted with the Asus H81T Motherboard (BOAMOT-471)
SYSBRA-237 Stone M770 21.5" Touch model fitted with the Asus H81T Motherboard (BOAMOT-471)
SYSBRA-238 Stone M770 21.5" Non-Touch model fitted with the Asus H81T Motherboard (BOAMOT-471)