J
Jeff Liebermann
Guest
On 08 Nov 2009 09:59:16 -0500, sam@repairfaq.org (Samuel M.
Goldwasser) wrote:
between the chip and the speaker. I can't tell where it's broken from
here. If you can identify the Realtek sound chip, perhaps you can
find the data sheet and identify the sound output pin. Then, use a
scope to see if it's putting out any sound at the chip. If there's
sound at the chip, but not at the output connector, you have a
motherboard with a possible broken trace, blown audio amp (if
present), or broken coupling cazapitor.
the sound output. I wrote that in 1985 and my memory is becoming
rather ummm.... dynamic.
Apparently, this one does not. So much for that idea.
may have to wait until I drag myself to my palatial office sometime
next week.
You might find something useful under this review:
<http://www.hardwaresecrets.com/article/477> (9 pages)
This might be a diversion but could be causing the sound to be muted:
Viiv support (i.e. support for Quick Resume technology, which
allows the PC to imitate the behavior of TV sets, where by
pressing the power button located on the remote control the
screen goes dark, the sound is muted and the keyboard and
mouse stop responding)"
Bingo. It's a Realtek ALC888 sound chip. Digging...
<http://www.realtek.com.tw/products/productsView.aspx?Langid=1&PFid=28&Level=5&Conn=4&ProdID=135>
Data sheet link is at the bottom of the page. Section 6.2 shows front
audio outputs on pins 35 and 36. Dust off the oscilloscope and see if
there's any sound on those pins.
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Goldwasser) wrote:
Ok, that means you have a working sound chip, but no connectionDiagnostics pass but no sound when doing "Test DirectSound".
between the chip and the speaker. I can't tell where it's broken from
here. If you can identify the Realtek sound chip, perhaps you can
find the data sheet and identify the sound output pin. Then, use a
scope to see if it's putting out any sound at the chip. If there's
sound at the chip, but not at the output connector, you have a
motherboard with a possible broken trace, blown audio amp (if
present), or broken coupling cazapitor.
Ooops. I forgot that it default to the timer sound output instead ofFonebell Sounds like a busy signal through the PC speaker.
the sound output. I wrote that in 1985 and my memory is becoming
rather ummm.... dynamic.
Some motherboard run the PC speaker audio through the sound card.And note that there was no PC speaker installed before. So, there is
a BIOS/POST beep now from the speaker as well.
Apparently, this one does not. So much for that idea.
I'll keep looking for some DOS based diagnostics with a sound test. ItBut nothing from the speaker in Windoze.
may have to wait until I drag myself to my palatial office sometime
next week.
You might find something useful under this review:
<http://www.hardwaresecrets.com/article/477> (9 pages)
This might be a diversion but could be causing the sound to be muted:
Viiv support (i.e. support for Quick Resume technology, which
allows the PC to imitate the behavior of TV sets, where by
pressing the power button located on the remote control the
screen goes dark, the sound is muted and the keyboard and
mouse stop responding)"
Bingo. It's a Realtek ALC888 sound chip. Digging...
<http://www.realtek.com.tw/products/productsView.aspx?Langid=1&PFid=28&Level=5&Conn=4&ProdID=135>
Data sheet link is at the bottom of the page. Section 6.2 shows front
audio outputs on pins 35 and 36. Dust off the oscilloscope and see if
there's any sound on those pins.
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558