Question about Line 6 Spider Iii 75 Guitar Combo Amplifier

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The amp was working fine and than just stoped , it wont turn on and all power is working.

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The most likely problem in this instance is damage to the power supply, probably caused by a power surge. The second most likely cause is damage to the power cord. If you can take it to a shop that has similar amps on display, you can probably test it on one of there power cords. If the power supply is damaged, it will be a bit more challenging. At this point, if you know a bit about circuit boards and soldering, you might be able to fix it. If not, you will probably have to pay someone, or simply replace the amp.

Posted on Mar 14, 2011

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Posted on Jan 02, 2017

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Julio, If you already changed power supply and no success, it is probably a bad solder joint on board. I will post a link below that may help or you can try a forum.
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It just wont turn on, and i'v tried other power supplies that deffinately work and it still wont. help!


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My amp, was working fine last night, it wont turn on, and i tried switching guitar, cables, even power supplys and still wont turn on, i heard a pop last time i used my amp, and then the signal was lost...


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1 Answer

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I just fixed my bass amp with a similar problem last week: the problem is related to a loose connection on the PCB board (likely).
A bass amp is a rough place for circuitry: the low rumble and power shake a bass amp more than a guitar amp.
In my case, the power transistors needed to be re-soldered and then the grounding bolts and screws needed to be removed and cleaned because the connection was bad. Remember that when two different metals needed for an electric connection are toughing, there is the likelyhood that corrosion WILL happen.
My bass amp did basically the same thing yours did: sounded good at low volumes, but at higher volumes it would act up.
In short, there is nothing you can do (unless you are a repair person): you need to take it to a local music shop and have a tech fix the intermittant contact problem: someone who knows what they are doing should only take an hour at most.

Hope that helps!
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