connecting a PSU to a board which doesn't a have 20 pin connector

[al_kaholik]

Hey, I have a micro sized board which has no connection for the ATX 20 pin connector but the manufacturer states that it can be used with ATX.

Connections on the board are a standard four pin Molex and an "external ATX control pin" There is a picture here if it helps


The three pins for the connector (white 3 pin connector to the right of the purple circular thing) are labeled ground, power on and always 5V. The instructions from the manual state

Quote:

This CPU board can support an advanced soft power switch function if an ATX power supply is used. To enable the soft power switch function:
1. Take the specially designed ATX-to-PS/2 power cable out of NC-674’s
accessory bag.
2. Connect the 3-pin plug of the cable to EXTATX (ATX feature connector).
3. Connect the power on/off button to PW/ON. (A momentary type of
button should be used).

Manual available here

I guess the ATX to PS/2 cable is not actually what it means, as it just has a 3 pin connector which connects to the board and has a 3 pin female plug on the end.

I've tried connecting the cable to - ground pin to black from PSU, always 5V to Red from PSU but am confused where the power on should connect to. Baring in mind I am using the PSU on a desk, so the green wire is shorted on a ground to give it power.

I manage to get the system to POST, but every time it tries to boot into windows it resets and I get the "start in safe mode" option on the next boot up with the reason being "power faliure" so I'm a bit stumped really.

Other specs that may help someone help me are...

Not running a power switch as it isnt' required as the board is getting power
Screen - LinITX - external power from its power supply
512mb RAM
Hitachi travelstar 2.5" drive
200W PSU - known working correctly

Any help would be great

Al

[Splash-X]

Based on the information in the manual, the ATX to PS/2 is some sort of converter that you plug in to the MALE end of the ATX PSU and plug into the PS/2 (mouse/keyboard port) of the motherboard.


This CPU board can support an advanced soft power switch function if an
ATX power supply is used. To enable the soft power switch function:
1. Take the specially designed ATX-to-PS/2 power cable out of NC-674’s
accessory bag.
2. Connect the 3-pin plug of the cable to EXTATX (ATX feature connector).
3. Connect the power on/off button to PW/ON. (A momentary type of
button should be used).

[davesaudio2]

funny board-------atxpsu
2-23 p1----gnd----<--7
2-23 p2-<-pwr on---this is switch?
2-23 p3---standby -<-9

2-19 p1---12v--<--
2-19 p2--gnd---<--
2-19 p3--gnd---<--
2-19 p4--5v----<--

If you can believe the manual seems 2-23 p2 is the normal power button

in which case nothing ever connects to pin 14 of the atx supply
so how can the board control the psu?
you do have 2-23 p3 to atx p9?

[al_kaholik]

I now have it booting in AT mode... Should have installed windows AFTER puttin the HDD on the board - textbook error :S

h

[SentraVIP]

Abit OT, but I'm just curious... Where did you buy that board & how much?! It's so small!!!

[al_kaholik]

SentraVIP: Bought it from a guy in UK on digital-car.co.uk Was looking for something real small, as its going in an old VW beetle, but powerful enough to run GPS, music and OBD-II for my new engine. It cost me £60, but the RRP is well over £200.

512mb RAM and a 1Ghz processor boots to a full version of XP Pro in just under 20 seconds from a 5400RPM hdd.


Still on the hunt for info to get it working in ATX mode if anyone has any brainwaves or ideas

[al_kaholik]

Now working