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  Old PIII MSI Motherboard can't work out Power LED jumpers. (Diagram) 
 
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frank muir Feb 13, 2006, 08:43pm EST Reply - Quote - Report Abuse
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Edited: Feb 13, 2006, 08:46pm EST

Replies: 7 - Views: 2049
Hello. I have just built myself a spare machine using an old MSI 6309 motherboard that I'm pretty sure is out of a Packard Bell Saturn.
I have connected all the jumpers up successfully, and everything works fine, the HDD LED comes on the front panel of the case fine when the hard drive is working, but there is no power LED on otherwise.
Here is a link for the diagram of the jumpers on the motherboard.

http://support.packardbell.com/uk/mypc/?PibItemNr=instr_Saturn...treme#show

It's the block called "JFP1" about halfway down the page.

The thing is, the connector that came out of the case is a three pin connector, with a wire either side and a blank in the middle, so I have seperated it into two seperate wires. The diagram for the motherboard seems quite cryptic. Where do you think I should be putting these two power LED wires? I don't understand their terminology. On the mainboard it has printed very small "Power LED" in pins 1 & 2 (top left of big block in diagram) - have tried this, but no power LED comes on.

What do you think?

Edit : Also, is there some way of manually getting the Power LED on the case to come on so I can check it's not the LED that's gone? It's a new case though......


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Mark Feb 13, 2006, 09:46pm EST Reply - Quote - Report Abuse
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>> Re: Old PIII MSI Motherboard can't work out Power LED jumpers. (Diagram)
Did you try switching the power led plug around? If its on backwards it won't light up.

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frank muir Feb 13, 2006, 10:02pm EST Reply - Quote - Report Abuse
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>> Re: Old PIII MSI Motherboard can't work out Power LED jumpers. (Diagram)
Yes I did, and no joy..... which pins do you think they should be connected to going by that diagram? I want to confirm I've got the right ones......

frank muir Feb 16, 2006, 12:59pm EST Reply - Quote - Report Abuse
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>> Re: Old PIII MSI Motherboard can't work out Power LED jumpers. (Diagram)
Erm.... anyone got any ideas? Still can't get this to work.......could I double check with someone which pins they think are the right ones according to the link to the diagram that I gave?
It's a new case, so I don't think it's a dodgy LED - however I suppose it could be, is there a way of making the LED light come on manually to check that it works?

Mat Nairb Feb 16, 2006, 06:49pm EST Reply - Quote - Report Abuse
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>> Re: Old PIII MSI Motherboard can't work out Power LED jumpers. (Diagram)
Download the manual for the MSI 6309 mobo here,

http://www.msi.com.tw/program/support/manual/mnu/spt_mnu_detai...amp;kind=1

It will tell you the correct way to connect everything.

frank muir Feb 16, 2006, 07:36pm EST Reply - Quote - Report Abuse
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>> Re: Old PIII MSI Motherboard can't work out Power LED jumpers. (Diagram)
I'm afraid the Saturn model of the 6309 is slightly different from that, it's the one in the diagram I gave above.....

john albrich Feb 17, 2006, 12:38am EST Reply - Quote - Report Abuse
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>> Re: Old PIII MSI Motherboard can't work out Power LED jumpers. (Diagram)
Based on your comment:

"The thing is, the connector that came out of the case is a three pin connector, with a wire either side and a blank in the middle, so I have seperated it into two seperate wires."

It sounds like this 3-pin connector was designed to connect to the "HD PWR" pin and the "GND" pin on the lower row at the lower left of the "JFP1" connector. The blank position is to avoid connecting to the "HDA" pin. Since LEDs are polarized, you need to ensure it is plugged in the right way.

However, without seeing how things actually connect up, it would seem to me that my suggested connection would interefere with the drive activity LED connectors (one being for ReadOps, the other for WriteOps? )

How are the drive activity LED connectors plugged in to JFP1?

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If you don't have any experience with electronics at all, then I advise not mucking about with any of what I suggest below unless it's all expendable.

To test the suspect LED, you can try to rig it so it replaces the HDD activity LED on the pins that currently power the HDD activity LED (since you say that works). In one orientation or another, if it's good, it should flash just as the other LED flashed.

A QUICK AND DIRTY LED TEST (with the LED/cable NOT connected to anything in the system)
To just test the LED (and cable), you can use straight pins to plug into the LED cable connector, and then use a 3V coin battery to VERY quickly touch and remove the pins on both sides of the battery. If it doesn't "flash" in one orientation, flip the battery over and try again. If it still doesn't light up, then the LED or cable/connector is likely bad. IMPORTANT: Connecting the LED to the battery for too long this way COULD damage the LED. If you want to be REALLY sure to protect the LED while you conduct this test, insert a 1/4watt, 330ohm resistor lead in one of the LED connector holes instead of a straight pin. Then use the other side of the resistor lead to touch to one side of the 3V coin battery in the above test, and the straight pin to the other side of the battery.

This will also show you which is the "GND" pin of the connector for JFP1, as it will be the one that when connected to the "negative (-) " side of the battery, the LED lights up.

It is best to use a REALLY small 3V coin cell, as the smaller the cell, the less current it can deliver to the LED, and the lower the chance it might damage the LED. For example, use a 2010 instead of a 2016, and a 2016 instead of a 2032 coin cell. If you use the current limiting resistor, cell size isn't important.

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To verify that you in fact have voltage between "HD PWR" pin and "GND", use a voltmeter. It will likely measure anywhere from 1.7 to 5Volts. If it measures 0 volts, then it isn't indicating power status. Note: you MAY be able to measure the voltage at the LED instead of at the JPF1 pins. A little bit of the wiring may be exposed near the LED and can be easier to get to with the voltmeter test tips. Another way is to stick fine pins through the LED cable wires to the LED to establish voltmeater contact points. This isn't normally advisable unless there's just no other way to do it.

frank muir Feb 18, 2006, 12:45pm EST Reply - Quote - Report Abuse
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>> Re: Old PIII MSI Motherboard can't work out Power LED jumpers. (Diagram)
Hmmmm.... yesterday I tried the mobo in another case, and, after a bit of pin swapping, the power LED came on.
Looks like it is the LED that's broken....
I appreciate the in-depth testing advice, and all other advice on this thread, thanks people.


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