colakid09

I just decided to open it up and take a look inside. Just a loose ground wire. Works great now except for the fact it's an MG

Any idea what could be wrong with the amp?

I have a line6 4x12 cabinet connected to my Marshall MG100hdfx 100 watt amp and its been working fine for about a year and all of a sudden when i turn it on now it just makes a really loud low tone with some static. Ive tried changing cables to connect it and nothing worked. I connected the cabinet to see if it worked by connecting it to the headphones input on my tv and it worked. I tried plugging headphones into the amp and the amp worked fine then. What am i doing wrong?