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  • Weird power problem

    Not sure why. But My PC wont power in the car anymore. I just brought it to my work bench and it powered fine. Im using an inverter and that seems to turn on. But when power the, the lights come on for a split second and it shuts down. Anyone have any idea why this would be happening? Its been fine for the past month.

  • #2
    The inverter is done.... Go for a DC to DC solution.... my has worked for 6+ years no trouble.
    TruckinMP3
    D201GLY2, DC-DC power, 3.5 inch SATA

    Yes, you should search... and Yes, It has been covered before!

    Read the FAQ!

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    • #3
      Done as in its broken? The inverter powers on fine.

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      • #4
        Originally posted by lexdiamond20 View Post
        Not sure why. But My PC wont power in the car anymore. I just brought it to my work bench and it powered fine. Im using an inverter and that seems to turn on. But when power the, the lights come on for a split second and it shuts down. Anyone have any idea why this would be happening? Its been fine for the past month.
        Are you saying the inverter turns on but then it shuts off

        or

        The PC powers up briefly they shuts down while plugged into the inverter?

        Does the inverter work with anything else plugged in?

        Did you change the PS when you took the PC to the bench?


        (sorry I originally read the inverter lights went out)
        TruckinMP3
        D201GLY2, DC-DC power, 3.5 inch SATA

        Yes, you should search... and Yes, It has been covered before!

        Read the FAQ!

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        • #5
          Originally posted by TruckinMP3 View Post
          Are you saying the inverter turns on but then it shuts off

          or

          The PC powers up briefly they shuts down while plugged into the inverter?

          Does the inverter work with anything else plugged in?

          Did you change the PS when you took the PC to the bench?


          (sorry I originally read the inverter lights went out)
          Well, just hooked it back up to the car and nothing. Maybe I was wrong but I never actually saw the PC power up B4. All I saw were the lights to my Lilliput, which is powered by my PC light up for a split second and then turn off. But I just plugged a portable light into the inverter and it worked fine. And no, PC on work bench is exactly the same as it was in the car. Weird.

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          • #6
            Maybe you are getting a voltage drop at a poor connection to the power side of the inverter that is taking it below it's allowable voltage.

            The drop will increase with more load like the pc versus the portable light.

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            • #7
              Originally posted by billmee View Post
              Maybe you are getting a voltage drop at a poor connection to the power side of the inverter that is taking it below it's allowable voltage.

              The drop will increase with more load like the pc versus the portable light.

              Thanks for your reply. I assume your suggestion is to check all connections. Kinda reminds me, I was driving in Brooklyn on Friday night, lots of bumpy roads, right before this happened. I pray this is the reason why. Never realized how much of an incovenience it was to troubleshoot a car pc.

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              • #8
                I agree with Truckin' mp3

                It's got to be your power inverter, my first revision of my system had a power inverter. it did the same thing, I'd be driving for a bit and then the pc would turn off. I started to troubleshoot the pc only for it to turn out to be the inverter. I switched to a dc-dc solution and I'm never going back. It even turns the machine on and off for me.

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                • #9
                  If the PC works inside (you say it is fine on the bench)
                  But not in the car, check all the the differences between the car set up and the bench.

                  That means power wires, monitor (if it did not go to the bench with the PC) and the inverter.
                  TruckinMP3
                  D201GLY2, DC-DC power, 3.5 inch SATA

                  Yes, you should search... and Yes, It has been covered before!

                  Read the FAQ!

                  Comment


                  • #10
                    Yep, for example, is the PSU you are using on the bench the same one that is in the car?

                    Use a meter to check the voltages coming out of the inverter, then go to the first place it has an opportunity to fail, either a connector or the PSU. Confirm that it works and move your way along the harness until you get to the PC. Make sure you check the plug from the PSU and look at the pins in the power plug to the motherboard to ensure they aren't corroded or loose.

                    If everthing looks good, check to see if your power on switch is working properly. In fact, check that first since it is probably one of the differences between your bench and car.
                    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:
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                    • #11
                      My setup is doing exaclty the same as described above. I am using a 500W invertor, connected through a relay pretty much directly to the battery. I am starting to think that Invertors are less than ideal as they all use modified sine wave output and it just seems to interfere with laptop PSU and i guess PC ones.

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                      • #12
                        A new inverter is like $40. It's a quick and relatively cheap troubleshooting attempt. If it works, great. Worth $40.

                        If it doesn't, well you've got an extra inverter. You'll need it eventually anyway.

                        But I'd also try the time honored procedure of taking the whole system apart, putting it back together, and seeing what happens. I can't count how many times I've tried to diagnose a problem and missed it, only to fix it unknowingly by taking it apart and putting it back together.

                        You could have some kind of unnoticeable short in the electrical connections somewhere for all you know. Taking it apart and putting it back together could remove whatever was shorting the system out. Just as an example...
                        Here it is! My carputer install! 1997 BMW M3

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                        • #13
                          Sadly I am using a new invertor, my old one was only like 150W but had the same symptoms. Im guessing il have to spend the 100$ to get a dc-dc and run the laptop from that?

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