Ive been installing satellite systems for about 5 years and have never seen this before. I have 90+ percent on sat A,B,C. I'm using the terk 3 lnb dish and a DTVD10. Around 5 or 6pm we will lose signal and about 9 or 10am it will start working again. I'm stumped. We have replaced the receiver and dish just to be safe, but, that did nothing.