What are the typical problems with the Mark IV?

[cradlefish]

I've own the Mark IV for over a year now and it's been working quite well. Although I don't know the history of the common problems users have dealt with the Mark IV.

Would be great for any Mark IV users to share there experiences to help other Mark IV users!

The thing I've come across are the LEDs go on and off.

The lead channel volume seems to decrease a bit when changing channels at some point during performances. I've read it could be the LDR's need to be replaced or possibly the Bass potentiometer needs replacement as well.

 

[MkIII Renegade]

New to the MKIV myself, but the only problems I see so far include the undeniable urge to keep the amp in your living room, purchase matching Mark cabinets, play the amp when you should be working, hearing loss, etc.

Oh and I have noticed the R2 lamp is intermittent, I will eventually have to deal with that...