GMAN wrote:

Hi, I just moved in to the new house. There is a 4-way coax splitter in
the attic, which has one input and four outputs (to different rooms). I
know that previous owners had a cable (from the cable company). It looks
like the cable was going into the same splitter in the attic, and then
routed to rooms downstairs. I want to use the TV antenna in the attic. I
tried connecting the TV antenna to splitter's input =96 absolutely no
signal is getting to TVs downstairs. I also connected the antenna to each
of splitter=92s outputs (which go to TVs) =96 exactly the same outcome -
not even a change in a static when I plug in the antenna. I bought a TV
signal inline amplifier from RadioShack =96 absolutely no difference.
However, if I drop a 100' coax cable directly from the antenna in the
attic to the TV downstairs (bypassing the splitter and all of the home
cable wiring), the picture is crisp and perfect. Can I run some tests to
ensure cable continuation (from the attic to rooms downstairs). Does
anybody know how I can get the signal from the antenna in the attic to
TVs downstairs? Thank you.

Try a female/female rf connector from radio shack. Bypassing the splitter
to see if it sends signal to each tv's

Sounds like he already did:

"However, if I drop a 100' coax cable directly from the antenna in the
attic to the TV downstairs (bypassing the splitter and all of the home
cable wiring), the picture is crisp and perfect."

*If* we take what he wrote above verbatim, I would suspect the cable from
the antenna to the splitter. I would try his 100' bypass cable again, but
this time include the antenna feed cable in the path. If it doesn't work,
it's that lead cable.