Hi guys,
I'm a 55 year old Mom whose son convinced her to build her next PC.
Which I did 2 weeks ago. Everything is fine... great really! Except I
can't get any sound out of the motherboard. I went to the ASUS site
and found a solution for a different board. I e-mailed them but didn't
get any answer.
Please don't tell me it has to do with my jumper settings! But if it
does, tell me what to do and what to watch out for. Thank goodness my
new case has a window and can open on the side (and cool lights!).
thanks from Vancouver, WA
Debbie A
Check the manual for a section that describes the FP_AUDIO
header. It is a 2x5 set of pins, with one pin missing. If you
don't currently have a headphone jack from the computer case
wired to this header, then there should be two jumpers on there.
MIC2 X X AGND
MICPWR X X +5VA
Line_out_R X<-->X BLINE_OUT_R
NC X
Line_out_L X<-->X BLINE_OUT_L
The motherboard should have shipped from the factory with
those two jumpers in place. <--> is my symbol for a jumper.
If you have hooked up case audio, then plug a headset into the
headphone jack on the front of the computer, and listen for
sound there. If the computer case doesn't have "return audio
lines", which would connect to the BLINE_OUT pins, then
you won't be getting audio on the back of the computer,
on the lime colored jack. In that case, you have a decision
to make - disconnect the front audio cable and use the two
jumpers (get sound on the back) or connect the front audio
cable without the jumpers in place (and get sound on the
front).
A proper front audio solution looks like this. The front audio
jack has two out and two return lines. Not many cases are
full featured like this:
-------------
| |
----------| Sound |
| | Chip |
| ------| |
| | | |
| | | |
Case Front Audio | | -------------
("Interrupting" Type Jack) | |
| |
-------- 1 AGND | | Lime Lineout (Back)
| ______ 2 Line_out_R <------| |
- -| / ^ | AGND ------+ (SLEEVE)
| | |--- 3 BLINE_OUT_R -------- | ----------+ (RING)
| | |
| | |--- 4 BLINE_OUT_L -------- | --------+ (TIP)
| | v |
- -| \_____ 5 Line_out_L <----------|
When a non-interrupting type jack is used on the case, then the
back audio is lost, and the wiring looks like this. The front
headphone still works, and there is no room to put the two
jumpers. The headphone jack in this case, only has a left, right,
and ground wire, and no return lines. There is no path for
the audio signals to get to the Line_out jack on the back of
the computer. This is a common deficiency in computer case design.
Either accept sound on the front of the computer, or remove the
audio cable and put the two jumpers back, to get sound on
the back of the computer again.
-------------
| |
----------| Sound |
| | Chip |
| ------| |
| | | |
| | | |
Case Front Audio | | -------------
( "Non-Interrupting" Type Jack) | |
| |
-------- 1 AGND | | Lime Lineout (Back)
| ______ 2 Line_out_R <------| |
- -| / | AGND ------+ (SLEEVE)
| | | ??? -------+ (RING)
| | |
| | | ??? ------+ (TIP)
| | |
- -| \_____ 5 Line_out_L <----------|
This is what it looks like, with the two jumpers in place,
as delivered from the factory. This is before there is any
front audio cable from the case, connected to the FP_AUDIO
header. The jumpers return the audio signal from the
sound chip, to the Lineout jack on the back of the
computer:
-------------
| |
----------| Sound |
| | Chip |
| ------| |
| | | |
| | | |
| | -------------
| |
FP_AUDIO | |
Jumpers | | Lime Lineout (Back)
Line_out_R ^-------| |
| | AGND ------+ (SLEEVE)
BLINE_OUT_R v--------- | -----------+ (RING)
|
BLINE_OUT_L ^---------- | ---------+ (TIP)
| |
Line_out_L v-----------|
HTH,
Paul
