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m2-atx failure? mobo doesn't post..

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  • m2-atx failure? mobo doesn't post..

    So yesterday I was driving along when my VGA cable fell out slightly, causing the screen to distort. I leaned over and pushed it in, and when I did I heard a small pop across the speakers, and the epia motherboard powered off.

    I pulled over and restarted it only to find that the motherboard wouldn't power on using my on/off switch attached to my m2-atx. I turned the ignition off, and back on which started the PC, only it did not post. The cpu fan goes full speed, no video is given, but the line-in (sirius) does play at a very loud volume .

    I went home and brought the epia mobo into a regular power supply on my bench and verified that it was able to post. I took it back out to my car, verified all of my connections, and looked for popped fuses (none). I then tried it again with the same results.

    To summarize:

    On/Off switch doesn't respond.
    Turns on with ignition, but does not turn off (have to remove power from the m2-atx).
    No POST, no video output.

    Does it sound like that pop i heard was something on the m2-atx? That's the only thing I can think of in this scenario, but it confuses me that it still powers on. It confuses me even more that the PS is somehow causing the PC to not post.

    In the interim I have it all unplugged for safety and I am driving around with no music. So sad

    Any ideas on this one? Thanks guys!
    03 Dodge Ram 1500 QuadCab
    Epia SP 1Ghz cpu, 512mb ram, 40gb 5400rpm hdd, 60gb IPOD
    Xenarc 10" touchscreen
    SIR-ALP1, Opus 150w PSU, Griffin Powermate knob
    RoadRunner, LSX Void 800x600 | iGuidance 3.0
    Zyxel P-330W for borrowing wifi

  • #2
    Got a multimeter? It would probably be helpful to probe the ATX connector when the PSU is powered up.
    And the fact that the PC does not shut off when ignition goes low makes sense, because the M2 only sends a momentary pulse to tell Windows to shut down. With a switch, you'd have to hold it down to cut power.

    With the fans spinning up, but no post, it's likely that the damage is localized to one or two components on the board - possibly something delivering 5V as that rail may be drawn upon for some of the VGA pins. I'm surprised the PSU failed with no damage to the motherboard, as it would have had to pass the current to the VGA cable.

    Comment


    • #3
      Originally posted by RawsonDR
      Got a multimeter? It would probably be helpful to probe the ATX connector when the PSU is powered up.
      I have one in the truck, I will go check it in a bit and report back.

      Originally posted by RawsonDR
      And the fact that the PC does not shut off when ignition goes low makes sense, because the M2 only sends a momentary pulse to tell Windows to shut down. With a switch, you'd have to hold it down to cut power.
      I have an external switch connected to the m2-atx that allows manual control of the motherboard. I held it for 15+sec with no shutdown, nor does the mobo boot by trying to start with the button. I used the same switch, but connected directly to the mobo when I took it inside and it worked fine.
      03 Dodge Ram 1500 QuadCab
      Epia SP 1Ghz cpu, 512mb ram, 40gb 5400rpm hdd, 60gb IPOD
      Xenarc 10" touchscreen
      SIR-ALP1, Opus 150w PSU, Griffin Powermate knob
      RoadRunner, LSX Void 800x600 | iGuidance 3.0
      Zyxel P-330W for borrowing wifi

      Comment


      • #4
        I went at the ATX connector with the multimeter and found NO 5v lead. I found many that were less than .025 (fluctuating), and one that was slightly over 12v and one that was slightly over -12v.

        Given that, it does sound like you might be onto something with regards to the 5v rail.

        Any ideas? Also is this an issue that I should contact the manufacturer about? I bought this thru mp3car.com, but i'm not sure who actually makes it. minibox? anyone have an email address handy...
        03 Dodge Ram 1500 QuadCab
        Epia SP 1Ghz cpu, 512mb ram, 40gb 5400rpm hdd, 60gb IPOD
        Xenarc 10" touchscreen
        SIR-ALP1, Opus 150w PSU, Griffin Powermate knob
        RoadRunner, LSX Void 800x600 | iGuidance 3.0
        Zyxel P-330W for borrowing wifi

        Comment


        • #5
          Well, I went ahead and emailed support at mp3car.com, and they are RMA'ing my PSU for me! Best support response ever.

          Just another reason why we should all continue buying from mp3car.com!
          03 Dodge Ram 1500 QuadCab
          Epia SP 1Ghz cpu, 512mb ram, 40gb 5400rpm hdd, 60gb IPOD
          Xenarc 10" touchscreen
          SIR-ALP1, Opus 150w PSU, Griffin Powermate knob
          RoadRunner, LSX Void 800x600 | iGuidance 3.0
          Zyxel P-330W for borrowing wifi

          Comment


          • #6
            Originally posted by bmbr
            Well, I went ahead and emailed support at mp3car.com, and they are RMA'ing my PSU for me! Best support response ever.

            Just another reason why we should all continue buying from mp3car.com!
            That's awesome to hear!! I have similar issues with my new M2-ATX, but it seems to be some sort of compatibility issue w/ my Sp13000? That's not confirmed or anything, just seems to be common..

            That said, iTuner is sending me a modified power supply free of charge!! Again, I love the support this community gets from the suppliers!
            1997 Mustang GTS "Jenna"

            VIA SP13000, 7" Xenarc TSV, 200GB, 'modified' M2-ATX, 1GB DDR400/3200, BU-353. RoadRunner + LSXVoid

            Comment


            • #7
              Wow Miles, that's also good news!

              If I remember correctly, I believe you were having the same "power on" issues I'm having with my M2-ATX/SP13000 combo. Did you originally purchase your M2-ATX from iTuner? Or did you buy elsewhere and contact iTuner directly when you experienced issues?

              I'm just trying to figure out the best way for me to get a new PSU ("best" = least amount of downtime for CarPC...when it works, I'm hooked on this thing!! )

              Comment


              • #8
                Originally posted by bash1979
                Wow Miles, that's also good news!

                If I remember correctly, I believe you were having the same "power on" issues I'm having with my M2-ATX/SP13000 combo. Did you originally purchase your M2-ATX from iTuner? Or did you buy elsewhere and contact iTuner directly when you experienced issues?

                I'm just trying to figure out the best way for me to get a new PSU ("best" = least amount of downtime for CarPC...when it works, I'm hooked on this thing!! )
                Yeah, I hear ya about being hooked on it I bought directly from iTuner, and Andrei was very easy to work w/ with and willing (without me even asking!!) to ship out a 'modified' M2-ATX.

                Side note: doing some goofing around w/ it last night, if I let it post and then power it off, and then repeat this approx 5-6 times, it does eventually boot and operate normally.

                Really hope the new M2-ATX version fixes this...
                1997 Mustang GTS "Jenna"

                VIA SP13000, 7" Xenarc TSV, 200GB, 'modified' M2-ATX, 1GB DDR400/3200, BU-353. RoadRunner + LSXVoid

                Comment


                • #9
                  The wire that goes from the M2-ATX J8 connector to the 2 pins on the motherboard header, which is for the power switch connection on the motherboard, is polarity sensitive. The M2-ATX will do some weird things if the connector on the MB is 180 degrees backwards. If the PC isn't powering off and on the way it should, try flipping that connector on the MB pins 180 degrees.

                  Also, the M2-ATX acts strange until you have had uninterrupted power to the J1 connector and booted the PC one time. After it has booted once, then things seem to act the way they should. If you remove power to J1, such as what happens when you shut off your power supply on your bench, then the M2-ATX will act strange again. Because of this, you will get different test results on the bench then you will get in the car. Unless you have some means of maintaining constant power to J1 when working on your bench and testing.....

                  It took me a while before I learned about the quirks of the M2-ATX. I almost tossed it in favor of a different PSU because it just acted so darn strange (inconsistent). What I didn't know was I created a lot of the problems for myself with not knowing about the two oddities I mentioned above.
                  8" Lilli TS
                  MB896F Mini-ITX MB
                  2GHZ Dothan 533MHz FSB CPU
                  1GB SDRAM DDR2 533
                  Seagate 300GB SATA150 HD
                  ENGENIUS WiFi MINI-PCI CARD 802.11A B 400MW OUT
                  Pioneer Slot Load SLIM DVDRW
                  Bluetooth V2 USB 2 Dongle
                  3COM BKP Cam

                  Comment


                  • #10
                    mate did u get it i got the same problem i turned it so it was fans on then pluged and unpluged the atx connection and boom it worked
                    my TURBO! Altezza!

                    ATEZZA / IS200 3SGE-TURBO 6SPD MANUAL , EPIA 13000, 512 RAM W/LAN , 100GIG , GPS , TOUCH, 3X LCD, FLUSH TOUCHPAD MOUSE, SOUNDBLASTER EXTERNAL

                    Comment


                    • #11
                      Nope didnt solve the problem what a waste of my time im going to have to move to a Optus damn it more expensive god what a waste of time doing by the m1 or m2 if your unsure because damn! im so ****ed off looks like it will be a few more weeks with no sounds or computer my computer will probley be worth squat by the time this is finished now there are massive posts on the m2 and a lot on the m1
                      my TURBO! Altezza!

                      ATEZZA / IS200 3SGE-TURBO 6SPD MANUAL , EPIA 13000, 512 RAM W/LAN , 100GIG , GPS , TOUCH, 3X LCD, FLUSH TOUCHPAD MOUSE, SOUNDBLASTER EXTERNAL

                      Comment


                      • #12
                        On/Off switch doesn't respond.
                        Turns on with ignition, but does not turn off (have to remove power from the m2-atx).
                        No POST, no video output.

                        Does it sound like that pop i heard was something on the m2-atx? That's the only thing I can think of in this scenario, but it confuses me that it still powers on. It confuses me even more that the PS is somehow causing the PC to not post.
                        Just for information and reference, I started a post on my M2 failure here:

                        http://www.mp3car.com/vbulletin/showthread.php?t=78221

                        This doesn't sound like the same issue, but it is another failure, so I thought I'd share. I wish we had a place to talk about equipment failure expereinces rather than scattering them around the board.

                        An amateur built the Ark. The Titanic was built by professionals.

                        Comment


                        • #13
                          Hey I am getting the same exact problem with my M2. When I hook it up, the fans spin but the motherboard will not post. It works fine when I connect it to a desktop atx power supply. I tested the rails and I am also getting nothing on the 5v rail. I don't see any chips that are burnt on the M2's board so I don't think it is completely fried. Has anyone found a way to fix this. Thanks for any help.

                          Comment


                          • #14
                            Originally posted by tgold
                            Hey I am getting the same exact problem with my M2. When I hook it up, the fans spin but the motherboard will not post. It works fine when I connect it to a desktop atx power supply. I tested the rails and I am also getting nothing on the 5v rail. I don't see any chips that are burnt on the M2's board so I don't think it is completely fried. Has anyone found a way to fix this. Thanks for any help.
                            Im talking to minibox about a replacement, but if that fails, I will work to fix my 5V. I suspect the 5V/3.3V buck-boost chip (surface-mount chip near the PIC) is to blame. Two things I cant figure out: 1) The PIC Vcc pin has stable 5V. From where? Only linear reg I see is a 6V. 2) My 12V rail comes on without sending an ON pulse in dumb PSU mode. Shouldnt 12V be off until the motherboard says to turn it on?
                            MII-12000 / Ampie / Lilliput 7" / BU-355 / PicoPSU / uSDC
                            Currently: Enjoying the setup, but always contemplating my next move...

                            Comment


                            • #15
                              Mine does the exact same thing in dumb psu mode. As soon as I give it power, the fans start spinning and it puts out 12v, even before I have hooked up the switch/ignition 12v+ wire or hit the power switch for the motherboard. BTW mine did work fine when I first got it. It died one day out of no where. If you do find a way to fix it, please let me know as I bought mine from someone in the classifieds on the boards here so I can't return it.

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