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From: TimeLord86 on 27 Sep 2005 05:58
Lo.

I recently finished building a new PC, with an Asus P5GD2 - Deluxe at
its heart. All was well until I noticed a problem with the onboard
sound: when it is playing out of a set of desktop speakers, it only
plays out of the left hand channel.

I checked the speakers, by testing two pairs, and installing a separate
sound card to double check as well. This was all to no avail.

Can anyone help?

Thanks!

From: Paul on 27 Sep 2005 10:21
In article <1127815133.207796.155930(a)g14g2000cwa.googlegroups.com>,
"TimeLord86" <the_insanely_mad_drummer_nx01(a)hotmail.com> wrote:

> Lo.
>
> I recently finished building a new PC, with an Asus P5GD2 - Deluxe at
> its heart. All was well until I noticed a problem with the onboard
> sound: when it is playing out of a set of desktop speakers, it only
> plays out of the left hand channel.
>
> I checked the speakers, by testing two pairs, and installing a separate
> sound card to double check as well. This was all to no avail.
>
> Can anyone help?
>
> Thanks!

Think carefully about your "front panel audio connector" AAFP
for a moment. It has an Azalia mode and an AC97 mode. In AC97
mode, for the line_out left and right hand audio signals to make it
to the back of the computer, there are two jumpers. The jumpers
would connect:

AC97 mode AAFP header jumpers

Line_out_R to BLINE_out_R
Line_out_L to BLINE_out_L

Now, if you go into the BIOS and select "Front Panel Support
Type" [Azalia], I presume that changes the definition of
the front panel audio header. Now, what happens to those
jumpers ? If both of the jumpers are left in place, Port_1_L
gets shorted to GND. SENSE1_RETURN gets connected to Port_2_R.
That doesn't sound very clever on Asus part.

I would recommend pulling the two jumpers off AAFP if the BIOS
is set as "Front Panel Support Type" [Azalia]. But, there
really isn't a lot of reason to be setting the BIOS that
way, unless you really own an Azalia compatible front panel
audio solution. With the good default value of "Front Panel
Support Type" [AC'97] that Asus uses, then you are supposed
to leave the two jumpers in place, if you expect to have sound
output on the green Lineout connector on the back of the computer.

Report back what you find, because I vaguely remember someone
else having a dead audio channel.

If this isn't a jumper problem, then it is RMA time. It could
be a mechanical problem with one of the jacks, or a dead output
on a sound chip. The sound chip manufacturers have matured a bit
from the bad old days, and a dead chip output should be less
likely.

HTH,
Paul
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