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Computer and amps not turning on, very temperamental.

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  • Computer and amps not turning on, very temperamental.

    Hi,
    basically the other day I was playing some music quite loud and suddenly my computer turned off and started restarting itself before tuning off completely.

    Now every now and then it turns on but if I turn the volume up too loud it dies.

    When it first started doing it I looked at the amps and they were turned off too.
    Yesterday the amps were on but the light was flickering.

    Has anyone got any ideas on why this is?

    At first I thought it was the big fuse at the front, but now I think it's the grounding.
    Car: Ford Focus
    Currently stock setup. Trying to decide on the best setup for me.

  • #2
    Its either the grounding or its drawing too much power when the volume is cranked....

    Comment


    • #3
      If both your computer and amps are playing up, there is a common problem between them. Do they share the same power cable and the same grounding point?

      Well you are still getting power to the amps so i dont think its the fuse.
      Check the ground connection.

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      • #4
        check your grounds both at the devices, their body ground connections, and the battery post ground, make sure tht it is clean and doesn't have any fuzz, and the battery cable ground-- i have a hunch that it is a grounding issue near the battery though...
        My OLD 2001 Mitsubishi Eclipse GT:
        "The Project That Never Ended, until it did"


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        carpc undecided

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        • #5
          ok, I have one power cable going from battery to a distribution box.
          Both amps and computer are grounded to the same point. At some point I will probably ground each thing to a separate point.

          Something that I noticed today, when I put the clutch down and let the revs drop, two lights come on for a few seconds. One looks like a fuel pump, the other looks like a battery. Also the fans sound slightly less noisy, the light on my dashboard display dims slightly. Also I was stuck in traffic so I pumped the break pedal and the dashboard display light dimmed.

          Phoned my Dad (the mechanic) and he's gonna have a look tonight =S

          What do you guys think it is?

          I'm now thinking alternator or battery =S
          Car: Ford Focus
          Currently stock setup. Trying to decide on the best setup for me.

          Comment


          • #6
            Did you do a big three upgrade?

            I'm thinking grounds aren't up to snuff, as was the first suggestion.
            It could be althernator or battery, but it's cheaper to do a big three upgrade.
            Have you looked in the FAQ yet?
            How about the Wiki?



            Under normal circumstances, a signature would go here.

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            • #7
              sounds like the battery to me - or maybe just a bad terminal or battery ground.

              definitely worthwhile doing the big three
              MacMini in an Alfa? - Why not!

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              • #8
                ok then, I was going to do the big three a while back when the weather was nice. But my Dad just sighed and said it was a big job (typical mechanic response).

                So now the weathers got grotty and looks like we're gonna have to do that anyway XD
                Car: Ford Focus
                Currently stock setup. Trying to decide on the best setup for me.

                Comment


                • #9
                  Big three is a simple job, should take no more than an hour if you plan it out well ahead of time.

                  Also I forgot to mention, flickering lights on the amp is a bad thing. Usually means poor ground, which could definitely cause voltage issues on your cars electrical system, shutting your PC down. Do your lights dim badly on loud music?

                  You may need a new/more than one battery.

                  Comment


                  • #10
                    yeah they dim fairly badly on loud bass beats, but only when stationary with the engine on. When driving it's fine.

                    Hopefully if the weathers nice, I can properly ground my system on Tuesday.

                    I'll tell you guys how (I remember) grounding my system. I got (I think) 8 awg cable stripped the shielding from the middle and wrapped it round a screw that I drilled into the chassis (yes I sanded the paintwork off first). Both ends of the wire then went into both amps ground. Then when I installed my computer I got another piece of cable and put it from the computer ground to the sub amp ground =S, maybe this is where I went wrong.
                    How would you guys recommend I ground my system?

                    Also, I can't seem to find anywhere that sell massive cables to upgrade the big three, where do you guys get them from? (btw, I live in the UK)
                    Car: Ford Focus
                    Currently stock setup. Trying to decide on the best setup for me.

                    Comment


                    • #11
                      any of the car audio shops should have 4ga cable.

                      where are you (UK is a big place)
                      MacMini in an Alfa? - Why not!

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                      • #12
                        I'm gonna order it online anyways, but Hampshire/Berkshire way.

                        Is 4ga enough? I was thinking I would have to go for 2 or bigger XD
                        Car: Ford Focus
                        Currently stock setup. Trying to decide on the best setup for me.

                        Comment


                        • #13
                          For Kenwood KAC-9104D, the current is 55A, so depending on the length of the wire,
                          you will need 2-5 AWG cable, and a 80-125A fuse, just for that amp.
                          You can start there here, or
                          you can check EMMA wiring recommendations.
                          Imho: use 0awg on big three, 2awg to sub amp, better safe than sorry
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                          • #14
                            Here's a great place to fill any of your wiring needs:
                            http://www.darvex.com/power_wire.html

                            Comment


                            • #15
                              Originally posted by simplex View Post
                              For Kenwood KAC-9104D, the current is 55A, so depending on the length of the wire,
                              you will need 2-5 AWG cable, and a 80-125A fuse, just for that amp.
                              You can start there here, or
                              you can check EMMA wiring recommendations.
                              Imho: use 0awg on big three, 2awg to sub amp, better safe than sorry
                              Dam, basically this is my setup.
                              *************************************************> 30A fuse > 8awg cable > amp
                              Battery > 200A fuse > 4awg cable > fuse distribution box > 30A fuse > 8awg Cable > amp
                              *************************************************> 30A fuse > 8awg cable > m4-atx

                              o and 4awg cable goes from battery to trunk.
                              Car: Ford Focus
                              Currently stock setup. Trying to decide on the best setup for me.

                              Comment

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