Hi, Since earlier on today my AVR280 has been a noisy beast. A green LED inside the unit keeps coming on and off (visible by looking through the top vents). the green light will come on for around 2 seconds then go off for around a second; this cycle is repeating without any break. The green light is accompanied by what sounds like a fan whirring up and it's obtrusively loud. The fan is on and off in time with the green led coming on and off. Any suggestions as to what the problem is and how I could possibly fix it please?