On 5 Sept 00, at 9:38, Demetri Kolokotronis wrote:

 > No one has addressed whether the fact that mobo has four speaker
 > connections, while internal speaker has two leads, leaving two
 > mobo speaker connections unfilled, relates to lack of output from
 > internal speaker.
 > Mobo:
 >
 > Data Out
 > N.C.
 > Ground
 > +5V
 >
 > Speaker:
 >
 > White
 > Orange

>At 9/6/00 06:11 AM, Dave Gillett wrote:
>   I don't think anyone knows *why* the speaker connector has two dead
>pins between the two live ones -- except that the original IBM PC did
>it that way.  Possibly it's to make sure that there's no way you can
>put the speaker current through one of the case LEDs?
>   In any case, the wiring you describe is totally classic/standard,
>and so unlikely to be relevant to your specific problem.

---  And I comment:

I have noticed that there has been two answers concerning connecting the
two speaker wires to the 4 pins on the motherboard.  One is connecting
between Data Out and +5v (Pins 1 and 4) while the other is Data Out and
Ground (Pins 1 and 3).  I may be mistaken but I think that I have had to
connect the speaker Data out to Ground on some boards (boards with active
data lines) and on other motherboards to Data Out and +5v (passive data
lines).  Demetri might need to change the connections for his particular
motherboard to make the PC speaker active.  Comments?

Doug

            Do you want to signoff PCBUILD or just change to
                    Digest mode - visit our web site:
                    http://nospin.com/pc/pcbuild.html