i got this unit with rom 11 card in it saying mute err0r and signal bars i n engineering meny stay red while my other box workining fine.....first i thought its card,,,,i changed it but still same then i changed couple of tuners but problem still there.....then i found some caps underneath goes blak i changed them but no joy ........could any body tell me what is this exactly so i can change them to make the unit work