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Thread: Computer and amps not turning on, very temperamental.

  1. #1
    Constant Bitrate
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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. #2
    Newbie
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    Its either the grounding or its drawing too much power when the volume is cranked....

  3. #3
    Newbie Moysie's Avatar
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    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.

  4. #4
    MySQL Error soundman98's Avatar
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    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...

  5. #5
    Constant Bitrate
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    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.

  6. #6
    Neither darque nor pervert DarquePervert's Avatar
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    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.

  7. #7
    Low Bitrate pulsarsimon's Avatar
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    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!

  8. #8
    Constant Bitrate
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    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.

  9. #9
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    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.

  10. #10
    Constant Bitrate
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    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.

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