its repairable m8, {the 1st thing to check is the "cim"} "the big silver box were you cut the talkback"-------check the joint from the screwon connector to were its soldered to the circut board inside the can------------------------if you get no joy, "take out the cim and plug your cable feed directly into the onboard tuner nearest the back panel, {you will have to put an rf connector on the end of your cable feed to try this}<<<<<doing it this way will tell you if theres a faulty component inside the cimm
next to try is swopping the onboard tuners over on the mainboard, {the 1000 will run ok with just the tuner nearest the back panel----its upto you if you replace the tuner near the card reader