Searching for signal on two channels only

[MonitorMan]

We have two S3 Tivos in two separate rooms both with two cablecards. One of them displays all our channels, the other is (recently) missing two HD local channels (408 & 409). I have tried rebooting and guided setup. Diagnostics shows 0 level on these channels. Apart from swapping out the units (is that even possible, aren't the cards setup for the outlets?) does anyone have any suggestions that I could try.
Time Warner Cable in Marina Del Rey CA.
Thanks for listening.:)

[ajayabb]

I wonder if you have a signal drop off on the second tivo. You could try a line amplifier placed before the split to the troubled tivo.

[dig_duggler]

Although you seem to want to avoid it, depending on the pain involved you could drag the non working tivo to the room with the working one and see if the channels come in. If so, seems like a signal issue to the other room. That seems like the most reliable way to troubleshoot.

Edit: the cards are paired to the Tivo's, not the outlets.

[KJW]

I have the same problem -- no signal or sporatic signal on three HD channels. these are Cablevision channels 702, 704, 705 and 710 in NJ. Not sure if the issue is TIVO or cable since I only have one HD TV in the house.

[RonDawg]

Although you seem to want to avoid it, depending on the pain involved you could drag the non working tivo to the room with the working one and see if the channels come in. If so, seems like a signal issue to the other room. That seems like the most reliable way to troubleshoot.

That's exactly what I'm thinking here.

Signal quality can sometimes affect the ability to receive individual channels. A few months ago, for some reason I wasn't able to get Discovery HD Theater, but the rest of my HD channels came in fine.

The tech tried swapping out the cards and re-validating them to no avail. He checked the line going back to the pole and realized there was an excessive number of splits as well as some badly corroded connectors on the outdoor section of line.

Once these were corrected, not only did I get HD Theater back, but the resulting signal strength was so improved, I no longer needed the signal amp that was installed by a previous tech.

[komosatp]

Signal quality can sometimes affect the ability to receive individual channels.

What about other times? I've don the wiring...any ideas as to now what?

The story:

Ever since they've been launched I’ve been having reception and pixilation issues on 2 of my 30 HD channels on my Series 3 HD Tivo which has 2 Cablecards installed. WDCA HD (189) and Discovery HD (184) are have nearly constant pixelation and frequent freezes (every 15 secs or so, but this varies alot).

All wires/splitters have been checked (and swapped), with no success. I actually have an HD box hooked up to the same TV, and those channels appear to be working fine through that box (which comes out of the same cable split). And tech has come out and checked the signal at the termination point, and even after rigging a home run, the issues remain.

The Series 3 TiVo has a feature where you can look and listen to a ‘signal strength’ meter. On all of the channels it’s a steady high number that fluctuates by 1 or 2 points. On the two channels that are having the issue, the meter shows 20-60 point swings.

Since both cards have the same problem (and are working on the other 18+ HD channels), I don’t think the cards went bad.

I have yet another service call scheduled, but I doubt that it will solve this problem.

I had this problem during a previous launch as well. And nobody at my provider can find the person who fixed it previously.

[FauxPas]

I recently had the same problem. I have a TiVo HD with two cable cards from Comcast. I couldn't receive two HD channels, 906 and 908. I called Comcast. At first they blamed the TiVo. I had to insist they send a tech out. The tech arrived and said he had Comcast send a "hit" to my cards. It was some kind of signal that tells the cards what channels to enable. Problem was fixed within minutes. The tech said the phone support person could have done this. So if anyone else has this problem, call and ask them to try this.