OK. Apartment building, one dish for whole building. H24 & HR24. 95% of channels work perfectly. 771 error on the rest. Channels not received include ESPNU, SECN, the new PT feeds of TBS and TNT. All other channels perfect. No one else has a problem. And, the channels DO work every now and then for a few hours. (And if I toggle "show SD duplicates" I get the channels in SD, so it is not a package issue.) Landlord's relative is a "reseller" and is clueless. Main DirecTV will not do anything, account must be served by "reseller". Sent out some guy, who just did the stuff they tell you to do, red button reset, etc. Which I had already done, plus a 02468 force and nothing works. He said he wanted to replace the wall plate barrel, which I told him it was two receivers with the same problem, which rules that out along with a receiver problem and he then said it was a "package issue" and I showed him the difference between a 771 screen and a not subscribed screen and then said he would look into it and get back to me, which he has not. Cable goes into a silver box marked "DTVTRIPLX-02" which has two cables out. One goes to a black box marked "DIRECTV NETWORK ADAPTER" which changes the coax to a computer cable and that runs to the internet (which is fine), the other coax runs to a boc marked "SWIM splitter SWM 4 Way" which has four cables out. All cables are in tights, no copper bent, none of that. Help?