• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Pins for on/off switch on 291042-001

AdmiralFace

AdmiralFace

Member
I'm building a computer, but... one major issue with my motherboard, i don't know which pins for the front panel i should connect the on/off switch, help!!





please :S
 
googling this tells me it the MB used in the COMPAQ EVO W4000 I found some pics but really does not show the exact pins but location is on P5 right below the IDE connector along edge of board. Hopes this helps
 
AdmiralFace said:
it does a bit... but i really need the exact pins, there are 15 pins so thats about 30000 possible combinations
Click to expand...

There wouldn't be 30000 combinations, since the pins would most likley be right next to each other. I may be wrong here, but the the standard convention is to have the 2 pins on the same side. usually they are setup in 2 and 4 pin groups. It's possbile that this would have a very specialized configuration, for which you would need a schematic pin-out...but if it were me, I would just start working the 2 pin connector around the outside. That's 8 combinations to test. There's likely a way to check the voltage with a vMeter. You could establish which are live and which are ground and the voltages of each...from that you could deduce which is the likely power circuit...
 
take a full picture of your board.

we can probably help you circle which is which if we can tell.

but it would be easier with a picture of your board.
 
I would've taken more but my cam spazzed


IMG00068201011180715.jpg



I know it's not great so heres a rough diagram:
o=pins
-=no pin

______________1
[ o o o o o o o o o ]
[ o o - o o o o o o ]
 
Just grab something that conducts electricity, such as your keys, and start touching things together. The pins will be next to each other on the same row. You won't break anything by doing this.
 
Ben90 said:
Just grab something that conducts electricity, such as your keys, and start touching things together. The pins will be next to each other on the same row. You won't break anything by doing this.
Click to expand...

I typically run a screwdriver down the middle of the rows. That will give you a general idea where they are, then you can narrow it down.
 
KHGamez said:
PB = Power Button

LED = Power LED
Click to expand...

yeah i got that, its in bold lettering indicating the 17 or so pines beneath it are for the power button and various LEDs.

I've ran a screwdriver down the middle, in fact I've run three 'drivers down the middle and no luck, I've checked with a multimeter and there are voltages so the board isn't completely at fault and the PSU works.

I've found out some more information if it helps, its a system board from an HP Xw4000 workstation.
I've also looked at a few other related threads and it seems that this board had a ribbon cable connecting system board to front panel, making it hard to differentiate between pins, also negating the need to know pin assignments if you have the correct cable, which i do not.
 
Last edited:
This is how my EVO W4000 motherboard is connected.

17 15 13 11 9 7 5 3 1
o o o o o o o o o
o o - o o o o o o
18 16 14 12 10 8 6 4 2

1 Power LED +
2 HDD LED +
3 Power LED –
4 HDD LED –
5 .
6 Power Switch +
7 .
8 Power Switch –
9 .
10 .
11 .
12 .
13 .
14 .
15 .
16 .
17 Connected to 18
18 Connected to 17
BBB
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top