I think that header is pretty standard, but I could be wrong. Here's the pin out for my MB-8500TTD:

An image I found on the web:

When in doubt, use your volt/ohm meter and measure. When I bought a cable for the PS/2 port for my MB8500, I had to redo the wires and verify them with a pin/ohm meter because the wire colors weren't standard.

ruthan wrote:

Hello, i bough Lucky star 5mvp3 4.0 SS7 MB, i have problem to get PS/2 mouse to run.. it arrived without PS/2 header, so i salva […]
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Hello,
i bough Lucky star 5mvp3 4.0 SS7 MB, i have problem to get PS/2 mouse to run.. it arrived without PS/2 header, so i salvage one from other machine (where it was working fine), but wiring is probably not compatible, i didnt found PS/2 mouse Bios option is probably always enables.. or dead, if is not problem with wiring, but i doubt it.

In manual is only very bad description of header connector..

Manual.PNG

My cable:

2019-10-12 22.56.01-PS2mousCable.jpg

Try this, it works on mine: ps/2 header

I did some clumsy measurement with voltemeter (i have this electrical and soldering, not computer stuff) if resistence is small or not.

I seems that these are connected:
PS My Cable MB end \ Right side of your PS/2 diagram front connector.
Red=Data
Blue=Clock
Yellow=GND
Green=Vcc

So wired it as for you MB header reagarding of diagram, if im not wrong its (MB connector color):
Pin 1 - red
Pin2 - nothing
Pin 3- Yellow
Pin4- Green
Pin5 - Blue

Still nothing, so my MB header is maybe wired by other way.

I really dont know how to measure MB pins.. on connected its simple there is just 1 cable and i need to find right ends, but on MB?

checked a few manuals and the Shuttle HOT-553 has the Data and Clock (pins 1 and 5) swapped on the motherboard connector compared to the image Repo Man11 posted, the others pins are the same.

You can find GND by putting the multimeter one probe to black wires or the chassis itself and other you use to find 0ohm connection on the header, for 5V you put one probe to red wires (HDD power, mobo power) and find the 5V on the header. The not connected pin can be determined by using diode test against 5V and GND, without connection you won't get any sort of reading while pins that go somewhere will show something between 300...700. Last remaining pins are your data and clock, try one way, if it doesn't work, swap them and try again and you finally have figured out the pinout.

Thanks, for all these measurements, has to be machine turned on or not?

Always off, when power is on the resistance and diode test readings will be all completely wrong.

Still nothing.. I checked testing mouse is still alive, its working with other machine. Im testing it with newest Cute mouse - device not found, with Serial mouse its working.

I only discover that pin 3 - is probably not connected infinite Resistance.
Im getting near zero resistance on pins - 4 and 5, when second probe is connected to case - so i dunno which one is GND. // Other gave me ~500 Ohms.
When i measured it when it was turn on i got +5V on first pin - second probe was connected red PSU cable. When its shutdown im getting anything 0.14 V or so on some pins, nothing significant.

I tried lots of combination still nothing.

With some combinations, im able to stop keyboard working.

Seller send me this:
Motherboard -> Mini-din PS/2 connector // 3rd collumn my mapping (check it pleas)
1 -> 5 (DAT) // Red
2 -> 1 (CLK) // Blue
3 --
4 -> 3 (GND) // Yellow
5 -> 4 (+5V) //Green

Im quite sure its i connected it that way but nothing.. Im not sure it it sound seems to be compatible with my measurements.. pin 1 should be data, i measured +5V, but maybe i dint it wrong. Pin 3 - seems to be right.

Try this:
1. Mouse Clock
2. Mouse Data
3. Not Connected
4. Ground
5. VCC

It's not listed in the 5MVP3 manuals that are still available, but there is a valid pinout in the 5MVP4 manual:
http://www.elhvb.com/mboards/luckystar/manual … 4/5mvp4_v10.pdf

On one luckystar motherboard I determined the pinout to be what is found here : LS-P54CE Rev:G1 mouse connector pinout

Looks like yours except Data and Clock are reversed.

Thanks for info.. I forgot on this project, during experimenting i probably killed Keyboard port.. Do you think that its possible to repair it by some soldering and chip replacement?

MB is booting, but keyboard is leds are only blinking and machine not register key presses.