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Do I Smell a Toasted MB or PS?

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  • Do I Smell a Toasted MB or PS?

    Sorry in advance for the long post:

    Looks like I toasted something, most likely it's the MB but maybe the PS too.

    I am going to be testing each ASAP but wanted to post my issue so I can make sure I never do it again. Perhaps it'll save someone else a few hundred bucks in the future.

    I have had phase 1 of my car pc (see sig) running smoothly for 3 or 4 months now. I needed to get a powered usb hub up to the front of my Explorer. So after doing some research and successfully bench testing a 5v run of wire from my bench atx molex connector (5v) to the hub connected to a laptop, I put the hub in the car and hooked it to the 5v a molex on the M2.

    Here's what happend:

    1. Started the car, pc fired up as normal, Centrafuse resumed from hibernation and I got music.

    2. The led on the hub was lit and I measured 5v at a random hub socket.

    3. Added a thumb drive to the hub and did not get a light on the drive and it was not recognized. The hub connects to the pc through an added 2 usb port hooked to the 3/4 header on the MB. I was having some hot swap consistency issues with this previously and read that I may have it plugged in the header wire(s) backwards, so...

    4. While everything was still running, I pulled the usb cable (not the header wire) from the back of the pc... The pc locked up, no music and the Centrafuse screen froze.

    5. I don't have a reset switch installed (I know, stupid!) so I turned off the ignition.

    6. I could still hear the pc running so I pulled the case/M2 power plug as I had several times before w/out problems. Waited about 5 seconds and plugged it back in.

    SPARK!

    7. I noticed a small spark near the base of the plug as I plugged it in. I knew that could not have been good.

    8. With a sick feeling in my stomach, and the engine still off, I decided to flip the both of the usb header wire connectors and try to restart it.

    9. Start the motor, nothing, no post, monitor, nothing.

    10. Went to the back of truck to see if anything was running, etc and got a wiff of the magic smell and instantly yanked the power plug.

    So now, I'm trying to first figure out what I did wrong and second try to figure out what I toasted. The monitor thankfully is fine!

    Does anyone have any advise on what I could have done differently? I probably could have disconnected the battery or at least the fuse at the dist block before unplugging/plugging the power plug but I have managed to unplug/plug before w/out problems.

    Could the spark have been static enough to fry something?

    Was there maybe some stored power somewhere that could have surged when I plugged back in???

    Thanks in advance for any advise!
    My System (2005 Ford Explorer)
    Intel D945GCLF2 Mini-ITX Mainboard
    2 GB RAM
    250 GB hdd
    500 GB USB hdd
    M2-ATX
    D-Link DWL-121 WiFi
    OBDII Elm327 Bluetooth
    Lilliput EBY701-NP/C/T

  • #2
    Check fuses first. Disconnect PSU from computer, check to see if it is working.

    If working, look on mobo for anything that looks 'blown'. Try powering it with a known good PSU, maybe on the bench.

    P.S. - Welcome to the hobby. I fried $500 worth of LCD screen from a static spark.
    Originally posted by ghettocruzer
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

    Comment


    • #3
      Originally posted by Bugbyte View Post
      P.S. - Welcome to the hobby. I fried $500 worth of LCD screen from a static spark.
      Ugh! That hurts!

      Will test the PS and MB ASAP.

      Any ideas on what I could have done to have prevented this?
      My System (2005 Ford Explorer)
      Intel D945GCLF2 Mini-ITX Mainboard
      2 GB RAM
      250 GB hdd
      500 GB USB hdd
      M2-ATX
      D-Link DWL-121 WiFi
      OBDII Elm327 Bluetooth
      Lilliput EBY701-NP/C/T

      Comment


      • #4
        There may have been a short in your wire, or the line you powered it off could not supply an adequate amount of power for what you wanted. The USB cable from the computer was probably still getting power from the computer which is why it didnt fry until you pulled out that USB cable.

        What connector on the power supply did you use to power this?
        My Nearly Complete Car:
        http://www.mp3car.com/vbulletin/show...ed-car-pc.html

        Micro Control Center... Control Your Car Across the Internet
        http://www.mp3car.com/fusion-brain/1...-internet.html

        Website: (It's a work in progress, really. All my projects have taken me from ever really developing it.)
        http://paulfurtado.com/

        Comment


        • #5
          Originally posted by PaulF View Post
          What connector on the power supply did you use to power this?
          I hard wired it to the 5v rail of a molex connector.
          My System (2005 Ford Explorer)
          Intel D945GCLF2 Mini-ITX Mainboard
          2 GB RAM
          250 GB hdd
          500 GB USB hdd
          M2-ATX
          D-Link DWL-121 WiFi
          OBDII Elm327 Bluetooth
          Lilliput EBY701-NP/C/T

          Comment


          • #6
            Did you ground it to the same rail?
            My Nearly Complete Car:
            http://www.mp3car.com/vbulletin/show...ed-car-pc.html

            Micro Control Center... Control Your Car Across the Internet
            http://www.mp3car.com/fusion-brain/1...-internet.html

            Website: (It's a work in progress, really. All my projects have taken me from ever really developing it.)
            http://paulfurtado.com/

            Comment


            • #7
              Originally posted by PaulF View Post
              Did you ground it to the same rail?
              Yup. One thing though... The 12v (and ground) rail of that same molex from the M2 is hard wired to my monitor.
              My System (2005 Ford Explorer)
              Intel D945GCLF2 Mini-ITX Mainboard
              2 GB RAM
              250 GB hdd
              500 GB USB hdd
              M2-ATX
              D-Link DWL-121 WiFi
              OBDII Elm327 Bluetooth
              Lilliput EBY701-NP/C/T

              Comment


              • #8
                Remove power supply cable, hit on buttom a few times, reattach cable, hit on button.
                Do you have a fuse in first few inches from battery? Get one.
                Slovenia, Europe
                best on-line radio

                Comment


                • #9
                  Originally posted by miko55 View Post
                  Remove power supply cable, hit on buttom a few times, reattach cable, hit on button.
                  Do you have a fuse in first few inches from battery? Get one.
                  I don't have an "on" button (or reset) on this pc yet... The M2 power supply is triggered from the truck's ignition status.

                  The 4 gauge power cable from the battery to the back of the truck is fused at the battery -and- at a fused distribution block near my amps and pc.
                  My System (2005 Ford Explorer)
                  Intel D945GCLF2 Mini-ITX Mainboard
                  2 GB RAM
                  250 GB hdd
                  500 GB USB hdd
                  M2-ATX
                  D-Link DWL-121 WiFi
                  OBDII Elm327 Bluetooth
                  Lilliput EBY701-NP/C/T

                  Comment


                  • #10
                    Remove that switch and also remove all cable that are essential for power up. Than use isolated screew driver and make a short on two power rails.
                    Slovenia, Europe
                    best on-line radio

                    Comment


                    • #11
                      Update: Looks like the MB is fried.

                      I have tested it w/ two known good PSU's and not only does the MB NOT respond at all, the PSU's play dead too. Plugging the PSU's into a known working MB, results in successful boot-up.

                      Interesting that the PSU's don't do anything when plugged into a burnt board! I suppose that is by design?!

                      I have examined the MB closely and found a very small component near the 20-pin power cable socket. I think it is a diode (D6). Looks a little brown on the top of the board. The actual component is on the bottom.

                      I wonder if I could resurrect it by replacing d6?

                      Now it's time to move on to the M2-ATX. Hopefully it's still good!
                      My System (2005 Ford Explorer)
                      Intel D945GCLF2 Mini-ITX Mainboard
                      2 GB RAM
                      250 GB hdd
                      500 GB USB hdd
                      M2-ATX
                      D-Link DWL-121 WiFi
                      OBDII Elm327 Bluetooth
                      Lilliput EBY701-NP/C/T

                      Comment


                      • #12
                        If you still have warranty take it back. You might get MB repalced. And no word about car use. You were using it at home.
                        Slovenia, Europe
                        best on-line radio

                        Comment


                        • #13
                          I wish... But I bought it used from a dude on the mp3car.com classifieds.

                          I'm writing it off, not that big of a deal.

                          I just wish I could figure how I did it so I don't do it again!!!!
                          My System (2005 Ford Explorer)
                          Intel D945GCLF2 Mini-ITX Mainboard
                          2 GB RAM
                          250 GB hdd
                          500 GB USB hdd
                          M2-ATX
                          D-Link DWL-121 WiFi
                          OBDII Elm327 Bluetooth
                          Lilliput EBY701-NP/C/T

                          Comment


                          • #14
                            I attempted to bench test the M2-ATX this morning. I set it up to a "hot-wired" atx PSU like this:

                            http://www.mp3car.com/vbulletin/faq-...workbench.html

                            Except, I do not have a motherboard (anymore) to hook the 20-pin to.

                            I figured I could give it 12v in from the "hot-wired" PSU, connect the 20-pin/molex bundle to the M2 and test for 12v coming out.

                            I get nothing.

                            Does anyone know if I am testing this correctly.

                            Thanks!
                            My System (2005 Ford Explorer)
                            Intel D945GCLF2 Mini-ITX Mainboard
                            2 GB RAM
                            250 GB hdd
                            500 GB USB hdd
                            M2-ATX
                            D-Link DWL-121 WiFi
                            OBDII Elm327 Bluetooth
                            Lilliput EBY701-NP/C/T

                            Comment


                            • #15
                              Update:

                              I read on another post here that in order for the M2 to turn on, you have to "hot-wire" it too. Makes sense now! So, once I jumpered the green and black pins on the 20-pin coming out of the M2, I was able to get 12v coming from a molex out of the M2 BUT I had to put my multimeter ground lead on the ATX PSU side in order to get a reading. Didn't seem right so I changed out the 20-pin harness coming out of the M2 and it's works correctly. I added a switch to replicate the ignition status and it works perfectly!

                              I wonder if it was the harness all along????

                              Anyway, it looks like I am only out a MB. Got a new one coming this week.

                              Here's what I got (added 2GB RAM for $23):

                              http://www.newegg.com/Product/Produc...82E16813121359

                              Thanks to everyone for the input!
                              My System (2005 Ford Explorer)
                              Intel D945GCLF2 Mini-ITX Mainboard
                              2 GB RAM
                              250 GB hdd
                              500 GB USB hdd
                              M2-ATX
                              D-Link DWL-121 WiFi
                              OBDII Elm327 Bluetooth
                              Lilliput EBY701-NP/C/T

                              Comment

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