Hey, i have a H&K trilogy, and i turned it on today but its not working.

The channel levels are all turned up, the master volume is up, everything is how it should be but its not working.

Its always had a cab in, but it might have got caught on something and got pulled out today while the amp was on, im thinking that could be what caused it.

The lights and LEDs at the front are all still on, and everything lights up.
The tubes also are glowing orange as usual

Anyone know what is wrong????
Jackson SLSMG Soloist
Jackson DXMG
ENGL Fireball E635 100
Peavey JSX
Orange 4x12
BBE Green Screamer