I live in an apartment building with poor cable wiring: for certain apartments, the cable is routed through other apartments. For example, the wall box in my apartment has 3 wires: incoming cable, a bypass, and the bypass return. I connect the incoming cable to the bypass with a coupler and use the return; disconnecting the bypass disconnects other apartment(s). My incoming cable line comes from another apartment. My cable Internet connection has been out for a week. A few TV channels have been affected (corrupted ? completely gray, OK ? corrupted), but the TV is generally fine. At the original onset, it was out 1 day, working 1 day, then out. The Time Warner Cable follow-up technician tested the incoming line and found that it had weak signal. He explained that only a portion of the signal was completely attenuated, which is why the TV continued to work. The tech said that the likely cause was a wiring or equipment issue in an apartment and that the solution would be to get a TWC tech into that apartment. The tenants of an apartment connected through my apartment are seeing similar problems. At present, we have been unable to contact the tenants of the likely apartments. Furthermore, we anticipate difficulty in scheduling a service call at their convenience. Hypothesis: The tenant is using a 1?3 (2 TV, 1 modem) splitter, connecting the bypass to one of the TV outputs. The tenant would receive better signal by connecting ahead of the bypass. The failure mode (connected, but weak signal) is inconsistent with a tech ignorant of the building. The techs do make mistakes ? my installing tech disconnected the apartment(s) dependent on my bypass ? but I've only heard of outright disconnections. It is unlikely that the tenant could have scheduled TWC service calls to match the 1 day down, 1 day up, continuously down pattern. I assume that all connections are made properly. I assume that there is some sort of filter in the splitter. Is this correct? Is my hypothesis consistent with information I provided? Is it likely, or are there many plausible causes? I know that the best and only real answer is to get a TWC technician into the apartment. In the interim, would a "cable booster" be likely to help? As we have had general signal strength issues, we would continue to use it after the resolution of this particular issue, and we would be willing to spend around $200. Cliffs My apartment building has poor cable wiring/routing. My cable Internet connection has been out, but TV is generally fine. Likely cause is in another apartment(s). It will probably be difficult to coordinate with their tenants. Hypothesis: A tenant has installed a splitter ahead of my connection. Would a cable booster help? Edit to update/clarify topic summary.