[rabbit73]

Sorry I didn't answer sooner, my wife isn't well and I had to get the nurse.

Your preamp isn't getting any power, and you might have created a short for the power supply and power inserter.

The best setup to prevent interaction between the two antennas is to keep them separate, each with its own preamp, coax downlead, power inserter, and power supply. You would then select which antenna to use with an A/B switch. Your tuner would need to be able to add a new channel after scan, like a Sony, so that you wouldn't have to rescan after each change of antenna.

If your TV is not able to add a channel after scan, you could connect the primary antenna to the antenna input of the TV, and the secondary antenna to a separate tuner. The output of the tuner would connect to the A/V or HDMI input of the TV.