Repair of Digital Receiver CDTV410 , Pace

Dear friends , I am using Digital receiver CDTV410 ( Pace ) to receive channels of local service provider . It has suddenly developed a problem . There is no output on the TV . I mean there in no menue or picture or error message on the TV set . Tv itself is working OK . Please help to diagnose the problem . Any help for its service manual will be also appreciated. Regards , Hasnat

if your using a coaxl cable feed r/f modulator might be bad.to check this look on back switch it to another channel exp: if set on three switch to four if no signal go to back.if you have video and audio out put jacks with rca connectors switch tv to video in see if you have signal composit video and audio.if not replace unit not worth fixing cheaper to replace.