JVM410HJS squeals


Currently my JVM410HJS squeals periodically.  Initially this would only happen occasionally and I was still able to gig with it, but now it has become to frequent to use.  It will do this even if unplugged from a guitar and will do it no matter which channel it is on.  Channel switching does not stop it.  I am not sure where to start.  Am going to change out the tubes and reset the MIDI switch, but otherwise will have to travel a good distance to find a qualified tech.  Anyone else ever had this issue?

Tubes MIDI

asked 30 Jun 2019 at 05:21 AM

Paul Turley
Answers: 1


Hello Paul,

With regards to your JVM410HJS, we would recommend checking the pre amp valves and if they are not a fault it could be the input socket not closing down correctly.


Kind Regards

Marshall Support

answered 01 Jul 2019 at 03:25 PM

Loading - please wait...