JVM410 Power On problem

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Green Manalishi
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JVM410 Power On problem

Postby Green Manalishi » 22 Feb 2018, 18:14

So my JVM is acting strange.
When I go to turn it on, the power switch doesn't light up and the amp doesn't turn on. I have to rock the switch a little for it to go on, sometimes holding it in a certain position to stay on.
After a few minutes it stays on by itself and no issues again until I turn it off.

Just a bad switch?

No issues with the standby switch
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surfnorthwest
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Re: JVM410 Power On problem

Postby surfnorthwest » 22 Feb 2018, 19:38

Sounds like a classic bad switch. Open it up though and make sure something just isn't loose in there.
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Re: JVM410 Power On problem

Postby Green Manalishi » 16 Mar 2018, 14:37

So I got around to opening it up and nothing loose. It is the switch.

Does anyone know what part number it is? It is the red power switch with the light.

Thanks
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Re: JVM410 Power On problem

Postby Anitoli » 16 Mar 2018, 20:51

It should be one of these:

http://www.amprepairparts.com/marshallswitches.htm

Scroll down to the third switch numbered SW-493.

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Re: JVM410 Power On problem

Postby Green Manalishi » 17 Mar 2018, 09:25

Thanks. I'll be ordering one.

It's been a great amp, first problem I've had with it in 10 years.
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