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  • Carputer 'freezes' at red lights

    This is a weird problem I have been running into and I don't know if it is temperature related. My carputer runs off a 400w power inverter and runs Media Engine. When I have my heater on and I come up to a red light or just don't use the gas pedal in general, my computer freezes until I press the gas pedal again. Has this ever happened to anyone? I don't quite understand it because I assumed the power inverter runs directly off the battery. My battery meter is ok so I don't think my battery is going.

  • #2
    Does your computer run with the motor not running? It could be the voltage drop when the motor is idle...?

    You could also increase the idle rpm
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    • #3
      I don't think it is heat related. I know in my car, and the battery has seen better days, at a stop light with the heater going, the lights dim slightly. The battery meter, however, doesn't move much.

      My inverter has a low voltage alarm on it. At a red light, or when my lights dim in general, the alarm does not come on. Does your inverter have such an alarm? You might want to test voltage at the inverter, instead of rely on the battery meter.
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      • #4
        Do you have a webcam that can see the lights? Maybe you need to tell it that it can go on red! hehe

        Defintely sounds like low power when your are off the gas. Maybe its your alternator. Try turning stuff like lights and window heaters on to use mroe power and see if you have to press the gass more and also park facing a wall at night and see if your headlights dim when you take your foot of the gas and your PC is running.

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        • #5
          Truly, this is the most weird problem I have ever heard of.
          Sorry, I know this is not going to help I just want to express my felling

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          • #6
            You sure you haven't programed the pc to play the game red light/green light????


            Seriously, it sounds like a power issue or lack there of. When you are at a light you are breaking, which not only uses break lights(power draw), but also reduces rpms(power generator) so it seems as if your pc can't get enough power at idle when breaking. The only issue I have with my diagnosis is that with an inverter most have voltage drop alarms that sound when voltage is too low and didn't mention anything like that.
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            • #7
              sounds like an alternator or battery problem.
              1) The alt isn't providing sufficient power to charge battery and run ACC at idle.
              2) The battery isn't holding the charge it's being given from the alt.

              If you're able, it would be helpful to know the output of your inverter at both states (idle, and driving) --I suspect you'll see the drop there (as anywhere).
              •Micke

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              • #8
                I'll second the Alternator or Battery. Reason being that the Alternate does not give as much charge when you are stopped as it does when you driving.
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                • #9
                  NOTE: If it _IS_ the alt or the battery, it's a foreshadow of more bad things to come.
                  dead battery, or dead car on the highway. you may want to take some time and get this looked at.
                  •Micke

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                  • #10
                    it doesn't sound like a power problem at all, actually. it sounds like a loose connection.. or more of a movement-related issue.. this happens each and everytime you stop? if the voltage dropped below the capabilities of the inverter, either the inverter's alarm would sound, or it would just shut down.
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                    • #11
                      IMHO:
                      It (cpu freezing) would also happen at decceleration. --or jerky acceleration.
                      Those two conditions haven't been cited.

                      I'd think threshold low power would more likely freeze a CPU than the momentary cut out that would result from loose connection(s).

                      & for clarification, does the 'freezing' happen when the heater is not on?
                      •Micke

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                      • #12
                        Originally posted by fantomas
                        it doesn't sound like a power problem at all, actually. it sounds like a loose connection.. or more of a movement-related issue.. this happens each and everytime you stop? if the voltage dropped below the capabilities of the inverter, either the inverter's alarm would sound, or it would just shut down.
                        Wiring could definitely be a possibility.
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                        • #13
                          If it was just slowing down and traffic lights it may me the extra load from your brake lights but not if its caused by acceleration as well (jerky) that points more to a bad connection
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                          • #14
                            Bueller? Bueller?
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                            • #15
                              Thanks for the replies..

                              The computer freezes a few moments at idle and when the heater is on. It doesn't freeze when I am idling so it makes sense it has something to do the battery charge and other devices requiring juice.

                              I have thought about checking out the output of the power inverter so that was definitely a good idea. Does this sound like my battery is slowly dying and I should get it checked? I've had this carputer for 10 months now and it just started to happen 2 months ago.

                              I don't think it is the wiring because the wiring has always been the same so it should have happened in the summer too. Would converting to a DC-DC power supply like an Opus solve this problem with using an DC-AC inverter?

                              Sorry about not replying sooner.. I didn't realize I didn't subscribe to my own post and thought no one replied!!

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