Question about Dell Inspiron 531s Desktop Computer

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I, too, am transferring the M2N61-AX motherboard from a Dell Inspiron 531s to a Cooler Master case, the 430 Elite. The problem is that the Dell front panel plug connection is a unified/consolidated pl

In addition to transferring the Dell/Asus motherboard, I have installed a new Ultra 550 watt power supply. All other connections to the board are fine. It is just this one thing. Someone posted that tapping a flat-head screwdriver on the board pins individually, in sets of two, would help to find which one is for the on/off switch, and it would turn the system on, but that did not work in this case. I have tried every conceivable plug configuration, in addition to placing the proper plug on the same labeled pin, but that does not seem to work either. The hangup may have to do with the pin that is left open using the Cooler Master plugs. Frustrating. Is there a reasonable solution? Again, thanks.

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  • Mark Douglas Haden Feb 21, 2012

    The part cut from the bold print above is that the Cooler Master has individual plugs that do not cover all of the pins on the motherboard while the Dell plug is unified/consolidated and does.

  • Mark Douglas Haden Feb 22, 2012

    Better details; I transferred the M2N61-AX motherboard from a Dell Inspiron 531s case to a Cooler Master 430 Elite case. Also installed an Ultra 550W power supply. Power supply tested and works fine. All power connections have been made to the main board, hard drive, etc. The problem appears to be with the front panel connection. There are nine pins on the Dell motherboard. The Dell front panel connector had a consolidated connector plug that covered all of the pins, although it looks as though only six of the connections were being used. Looking left to right, the configuration was such that there were red/yellow wires attached to the part of the plug for the switch, white/black for the HDD L.E.D, and purple/blue for the reset button. The other connections are open, but cover all of the pins when plugged to the motherboard. As for the Cooler Master front panel connections, the connections are not consolidated. There is a plug for the switch with orange/white wires, for reset with blue/white wires, for HDD L.E.D. with red/white wires, and connections called +P L.E.D. with a green wire and -P L.E.D. with a white wire. I have connected the correct plugs to the correct pins, although I am not really certain where the +P and -P plugs should go. Even so, that covers just 8 of the 9 pins on the motherboard with one pin open. One would think that just connecting the power button would suffice just to see if the thing will turn on. Nothing happens. All other components are fine. The pin configuration on the motherboard looks like this ::::. with the last three being the open pins. The Cooler Master manual describes the front panel connections as .:::: with the first pin designated as 'no connection', the next set as GND (ground), followed by LP+, then LP- and ending with USB+5V. I would appreciate any constructive input to see if this is workable, or whether there is something else that may be going on that I am overlooking. Short of solving this issue, my next option appears to be buying a motherboard that is more compatible with the Cooler Master case. Was hoping to hybridize using components on hand, though.

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I think you need to contact Cool master about this.

Posted on Apr 16, 2017

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SOURCE: need pin assignment for model: m2n61-ax

If this is a Dell Inspirion 531 here is the owner maual with all the components
http://support.dell.com/support/edocs/systems/inspd531/en/OM/45605A00MR.pdf

Posted on Oct 10, 2009

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