I just bought a Marshall haze 15 stack. I was trying a couple pedals I have with it as a boost. One was a digitech rp255 and the other a boss PW10 from a buddy. Every thing worked fine, when I swapped the pedals. Then I wanted to go straight in so I shut off the power waited a few seconds and plugged my guitar straight in. No sound. I can hear the hiss of the gain channel but no matter what I do there is only a hint of volume, and it does not get any louder when I turn the volume up on the amp. Clean or dirty.
I tried differant gutiars different cables, foot switch on and off.

I just unplugged the footswitch and tried it and got a squeel like a stuck pig WTF is wrong?
The shotclock ran out?

No jk, the guitar cable is plugged all the way in?

Sorry gotta ask.
I wondered why the frisbee was getting bigger, then it hit me.
you might have blown a tube.
look in the back and see if they are glowing properly. if your not sure you can always snap a pic and show us.
Live Rig
Michael Kelly Custom Shop Plum Telecaster
Michael Kelly Custom Shop Plum Patriot

EVH 5153 50w
Jet City 2x12
Custom Board

It is NOT trash metal it is tHrash metal...get it right
Looks like the tubes are all glowing. I have 2 6v6 tubes and 2 smaller tubes that are the preamp I assume. The preamp tubes are glowing much more than the other two(I am a noob to tubes) I can post a pic if you give me a heads up as to how to do it.