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Houston TV To Many Channels That Are Not Working

Houston has to many channel that are not working or no sound what is up?? Here is the listed I just made of channel that are messed up

21.1 no picture
21.2 no sound
21.3 no picture
21.4 no sound
21.5 colored bars
28.7 colored bars
34.1 colored bars
34.3 colored bars
34.4 colored bars
34.6 colored bars
43.2 no picture
55.4 no picture
55.6 no sound
 
It's common for low-power TV stations to have technical issues. It's also common for them to use color bars as placeholders for unused channels rather than deleting the unused channels from the PSIP. The color bars let potential customers know that bandwidth is available.

Here in DFW we also have a plethora of color bars. Last I checked:
18.4
26.2
28.2
28.3
28.4
30.9 (this just popped up recently so something new may be on its way)
44.4

I haven't seen any "no picture" issues in DFW lately (except 29.10-29.13 which are audio-only anyhow), but they do crop up on occasion.
 
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