Ok so last night we got a power cut so I am concerned what's happened here. I recently just got an LV300 around 2 months ago haven't over used it at all. So today when I've turned the amp on to try out my new christmas gear the amp is making an annoying Humm sound. It won't respond to putting cables in and even with the volume down it still persists in making the same exact humming sound.
Any ideas?
Could is also be a fuse issue?
Well I hope my local shop will replace them if that is the case... as that is a lot of money down teh drain otherwise.
You could easily replace the tubes yourself. They literally pop in and out. Just be careful to get the right ones, and make sure you don't touch the glass with your fingers! That really only matters on power tubes, but hey, why risk it?

Good luck.
"When I was a kid I inhaled frequently. That was the point."