Help deciphering front panel connector pin out

I have a Compaq motherboard (P.N 2159770002 from a Pressario 7003us or 7006us)
which is an OEM version of Intel's D850GB. I have tried to devine the pin
asignments of Compaq's frontpanel connector. I have compared it to another
Compaq Pressario (5BW250 5000 series) but only the PWR Switch is in the same
position. By trial and error I have also found the PW LED pins but haven't
found the HD LED activity pins.

Any help would be appreciated. No manuals exist on their web site and Intel is
useless.

Also I noticed on the 5BW250 that the PWR LED connection appears to be a yellow
green dual LED. I have never noticed any color but green coming from the power
on led. Any idea what Compaq is doing with this arrangement?

Regards,

John

JTM <> wrote:
> I have a Compaq motherboard (P.N 2159770002 from a Pressario 7003us
> or 7006us) which is an OEM version of Intel's D850GB. I have tried
> to devine the pin asignments of Compaq's frontpanel connector. I
> have compared it to another Compaq Pressario (5BW250 5000 series) but
> only the PWR Switch is in the same position. By trial and error I
> have also found the PW LED pins but haven't found the HD LED activity
> pins.
>
> Any help would be appreciated. No manuals exist on their web site
> and Intel is useless.

Actually, Intel is far from useless:

ftp://download.intel.com/support/mot...d850gb/qrg.pdf

More where that came from.

http://support.intel.com/support/motherboards/desktop/

Regards,

James

>
> Actually, Intel is far from useless:
>
> ftp://download.intel.com/support/mot...d850gb/qrg.pdf
>
> More where that came from.
>
> http://support.intel.com/support/motherboards/desktop/
>
> Regards,
>
> James

Thanks for the response,

Unfortunately this is an OEM motherboard and the pin header in question is a 20
pin dual header vs the documented verson from Intel which has a 16 pin dual
header and the Compaq 5BW250 which has an 18 pin dual header. Apparently Compaq
likes to reinvent the wheel with each product.

Since Intel doesn't support OEM boards and Compaq refuses to acknoledge that
their motherboards are actually just a modified version of a retail motherboard
from Intel, there is no help from either of these sources.

So at this point I am reduced to testing 20 pins taken two at a time (actual
since I have the PWR SW positions) only 18 taken 2 at time for 306 different
possible connections. Hopefully the ones I need are adjacent and will be found
sooner rather than later.

Regards,

John

John, or anybody:

Did you anywhere with this one? I'm in the exact same position, trying
to decipher the 5BW250 mobo pinout. New motherboard in old case, you
know the drill...

Thanks,
Chris

John, or anybody:

Did you anywhere with this one? I'm in the exact same position, trying
to decipher the 5BW250 mobo pinout. New motherboard in old case, you
know the drill...

Thanks,
Chris

... years later

I have this same problem myself and with multimeter have determined that the pinout of the Presario style motherboard USB header is:

1 -- GND 2 -- GND
3 -- D1+ 4 -- D1- (ie. port #1 data pins)
5 -- 5V 6 -- 5V
7 -- D2+ 8 -- D2- (port #2 data pins)
9 -- NC 10 -- BLANK

Possibly you'll sweat over this, the unusual horizontal pairing of the data pins etc. - but this is a Compaq OEM version of the D850GB motherboard.

After a good deal of heartache, I have 2 working front panel USB ports.

Anyone out there?

Oh, the other connector, J9B1. I don't have complete information and it is possibly / likely without reset pins. What I have is this:

Googling, I (thankfully) found:
Power LED - 2 (green), 4 (white)
HDD LED - 6 (red), 8 (white)
Power Sw - 14 (orange), 16 (white)

With horizontal pin pairing rather than vertical in mind, I see these apparently viable alternates:
2, 1
6, 5
16, 15

I too have front USB ports working from a 845GRG mobo!

Thanks for posting!


It does seem odd about the front panel - i just traced the wires...

if the LED does not light, it's just reversed



Cheers!
mike