Hi I have an Humax F1 Ace used C-band only type of receiver. It stopped working a week ago and it doesn't showed signs of recovery, no pictures, no signal quality, no signal strength either, the c-band conecctions are fine because I have attached another receiver and it works fine....The lights on the F1 Ace are ok, when swithed on goes from red to green as it normally does but simply there is no signal whatsoever.....Do you guys think it could be the tuner??? and is it easy to fix???