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August 14th, 2016 17:00

Dell XPS 730x Issue.

Hello all,

 I just installed a new sound card in my XPS 730x. I must of loosened something because it will only boot while holding down the PS reset button. While booting up I get " Alert! M/B I/O plug not connected. Could some on point me in the right direction on which plug this is before I start opening things up again. Thanks all. Josh

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44.3K Posts

August 15th, 2016 11:00

Have you checked the cable connection between the front panel and motherboard inside the case?

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46 Posts

August 16th, 2016 17:00

Thanks for the response. Not sure where the connection between the the MB and front panel would be but I'll have a look.

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44.3K Posts

August 17th, 2016 16:00

Check these, for starters:

#11 on motherboard, in manual, page 3.

#13 on master control board, page 5.

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46 Posts

August 18th, 2016 12:00

Thank You

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44.3K Posts

August 18th, 2016 13:00

Fixed ?

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46 Posts

August 19th, 2016 11:00

Not yet. Pointed me to what I was looking for in the manual.  I have a 730x not a 730 though. #11 in the 730x diagram is the internal USB header 3 (USB). Is that what you meant? I'm trying to clear a way to see the MC board atm. Lots of stuff in he way. Thans all for the continued help.

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44.3K Posts

August 19th, 2016 12:00

Sorry...my bad...  I looked at the 730 motherboard diagram and not the 730x diagram. :emotion-10:

But if you look at the 730x diagram, there's an unnumbered header in approximately the same place as #11, "font panel connector" (DUH - nobody proofread the diagram :emotion-40: ) in the 730 diagram.

I assume that's the "font" panel connector for the 730x, because it's not marked elsewhere on that motherboard. :emotion-5: 

I have no idea what the other unnumbered connectors are in that same area on the 730x board.

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44.3K Posts

August 19th, 2016 13:00

Did you check the connectors on the motherboard too?  And there has to be a cable to the front panel, so did you check the connector on the front panel end of that cable?

You can also try clearing BIOS:

  1. Power off, unplug
  2. Press/hold power button for ~15 sec
  3. Open case and remove motherboard battery
  4. Press/hold power button for ~30 sec
  5. Reinstall battery
  6. Close case and see if it boots with only mouse, monitor and keyboard connected.

Dell cases use a custom connector to the front panel, so you will have problems installing a new motherboard in this case. And you're going to have to buy a new license for Windows, because the version installed on the hard drive is tied to the Dell motherboard.

Maybe you should take it to a reliable PC shop and let them troubleshoot for you.

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46 Posts

August 19th, 2016 13:00

I  checked all the MB MCB connections and reset all ram and other components and still the same issue. I guess I'll end up gutting this 730x and use the 1000w PSU/ chassis to build or have built another PC. Thanks all for the help.

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46 Posts

August 19th, 2016 14:00

I checked every connection I could find.  I'll go through it again another day. I have an Alienware R5 Aurora on the way now.

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