PT890 Neo (MS-7258): mono audio (sometimes)

Hi there.
I mount a PT890 with an Intel E2200 cpu. All fine.
But, sometimes, i found audio output MONO, no more stereo. I lose RIGHT output. This is strange.
Drivers audio are original AC'97 from MSI site:
Realtek Semiconductor Corp.
08/03/2007
5.10.0.6230
XP - SP3 / 3GB RAM / 2 SATA HD (320gb+1tb) / GF9400GT
What do i do to make STEREO turn back again? Unplug audio jack from motherboard, plug again (sometimes also 10 times), then, right output comes up magically again.
What's the problem?
Audio speakers are OK, when PT890 does not output right channel, i tried to connect speakers to notebook, and they both play sound (so speakers are ok). Reconnecting to PT890 misses right output (until a unplug/plug again some times, as yet explained).
Any suggestion? Thanxxx.

Quote from: verbal_666 on 10-February-10, 18:04:24
Speakers play fine connected to notebook, when pt890 goes mono.
Also, when mono problem comes out, i try to plug my headset to pt890, mono also here.
Seems something in jack or mobo hardware component :(
By "mono" you mean you can hear only one of the channels?

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