my valve integrated amp has developed a fault after the intial soft start up it is sending a loud hum to both speakers , unplugged my cd player and interconnects and still the same so deffo the amp , all valves are glowing and no nasty noises internally from the amp or the transformers , forgive me if this all sounds a bit ignorant but i dont have a clue

i live near newcastle [ in the north east ] could anyone direct me to someone with the technical know how to take a look at the amp with a view to repair