Random channels go black on TIVO HD

Discussion in 'TiVo Series3 HDTV DVRs' started by DrDatabase, Oct 26, 2007.

  1. Jan 2, 2008 #41 of 140
    yroca

    yroca New Member

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    Dec 6, 2004

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    Supermurph - I am using component and am experiencing the issue. Reboots used to fix the problem...but as of right now I have gone 5 days and several reboots without the channels coming back.
     
  2. Jan 2, 2008 #42 of 140
    yakima2k

    yakima2k New Member

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    Jan 17, 2005

    I am having exactly the same issue as posted here. Couldn't have typed it any better myself...

    ps - I'm a Charter subscriber on the Outer Banks of NC
     
  3. Jan 2, 2008 #43 of 140
    YazooWho

    YazooWho New Member

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    Sep 30, 2004
    Gilbert, AZ
    My guess with the variety locations of users and the common piece being that they are all behaving the same with the same equipment (THD, M-Cards, blank channels, restarts fixes) that this might be a Tivo software bug.

    Thoughts?
     
  4. Jan 2, 2008 #44 of 140
    yakima2k

    yakima2k New Member

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    Jan 17, 2005
    I think it's absolutely a Tivo issue, because I do not experience channel blackout on my Charter HD box in the bedroom. It's definitely something to do with the way the Tivo HD and the CableCard are interacting.
     
  5. Jan 2, 2008 #45 of 140
    CrispyCritter

    CrispyCritter Purple Ribbon Wearer

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    Feb 28, 2001
    North...

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    And I would say it's absolutely the case that it (the Cox Phoenix problems - there are other problems in this thread that are different) is a cable company problem. There have been several locations discussed in this forum where the cable company is changing how they handle cablemaps as they prepare for SDV. In a number of them, the cable company has goofed up with the symptoms seen here. In a couple, the company has found the problem, admitted it was their fault, and fixed it. (The problem is just bad cablemaps in some locations; in others it is bad programming such that the cablemap works for M-cards but not S-cards or vice versa).

    Your Charter HD box undoubtedly does not have cable cards in it, and thus is unaffected.

    The cable cards and the TiVos are pretty constant throughout the country (and most people have no problems). What causes these sorts of problems in particular locations are cable company goofups.
     
  6. Jan 2, 2008 #46 of 140
    yroca

    yroca New Member

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    Dec 6, 2004
    That might actually make good sense too, because, as I previously posted, Cox had sent out postcards to my neighborhood and I have actually witnessed a Cox contractor swapping out some equipment at each of the boxes between every few houses in the neighborhood. This was about 2 weeks ago.

    How do we get it fixed if this is the case...and if the cablemaps are screwed up, why would rebooting fix it for some?
     
  7. Jan 2, 2008 #47 of 140
    dwiller

    dwiller New Member

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    Sep 28, 2001
    Boston, MA, USA
    I am having the same problem and am VERY frustrated. I have Comcast. A Series 3 TiVo with 2 S-Card CableCards. I've had my Series 3 since 9/06 with no problems until now.

    When I first noticed the problem, restarting TiVo fixed it. Now, I'm losing channels randomly. When I go to 'Test Channels' in the CableCard menu I get "No Channels Available". 2 days ago, I had nothing in the 200s and nothing above 807 (so most of my HD channels). Then later that same day, I got the 200s back. I called Comcast and they scheduled me for a service call next week (at $25). Last night I had no channels at all, nothing. I restarted, nothing. I plugged the TiVo directly into the wall, in case I had a signal issue with all of my splits and amplifiers. Nothing. Put the TiVo back into it's splitter, plugged the coax from the splitter back into the wall, and then I had channels! I couldn't believe it. (I was in the 'test channels' screen in the CableCard menus when I did this). Watched all sorts of stuff last night, tested the lower channels, tested the 200s, tested my HBO in the 300s and all of my 800s HD channels. All worked.

    Wake up this morning, I've got a black screen. TiVo is trying to record something on one of the HD Discovery channels. Start flipping around. The only channels I'm getting are from 226 - 307 (including my HBOs) I'm using the Signal Strength Meter (under settings/channels menus). It won't even let me type in 805 for example. I'm seeing about a 77 for channel strength for the channels that show up in the signal strength meter.

    I tried my trick of unplugged the cable line and plugging that back in and it didn't work. I also tried rebooting again and that didn't work. I have things I want to tape tonight. This is very frustrating. I ditched the cable HD box because it was unreliable. That's why I paid $800 for this TiVo because I couldn't STAND the cable company box. But now I'm thinking I might have to go back to it. I just can't have my cable not working. If this is a TiVo issue I want to be reverted to the 9.1 software, because I didn't have problems like this until the 9.2 update. If this is a Comcast issue they'll never admit it because my other Comcast boxes work.

    Dave
     
  8. Jan 2, 2008 #48 of 140
    CrispyCritter

    CrispyCritter Purple Ribbon Wearer

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    North...
    My understanding is that rebooting forces a new downloading of the complete cablemap. The cablemap is then supposed to be refreshed every so often on these active systems, and it sounds like that is not happening correctly. As far as I know, the only ways a user has to try to refresh the cable map are to reboot, or to call the cable company to get another hit.
     
  9. Jan 2, 2008 #49 of 140
    yroca

    yroca New Member

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    Dec 6, 2004
    My TiVoHD has lapsed to the point where rehit / reboots aren't fixing the issue. This problem seems to get worse. Anybody else where a reboot is not fixing it?
     
  10. Jan 3, 2008 #50 of 140
    Supermurph

    Supermurph New Member

    79
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    Oct 15, 2007
    Scottsdale, AZ
    After posting last night, I called Cox. They hit my card and that didn't work either. When I woke this morning, I turned on the TV and then everything was working. It's still working fine tonight. I'm sure it's temporary.

    I searched through Tivo's knowledge base to see if I could find anything and something caught my eye. Take a look at paragraph c below. When I do this, it always says Tuner=0, but I have one MS card in slot 1 (presumably Cablecard 1). Am I interpreting this incorrectly or is this a clue?

    ------------------------------------------------------------------

    For each CableCARD that is having an issue:

    a. Tune to a channel that is having a problem and press RECORD to lock the tuner to the CableCARD.

    b. Press the TIVO button and select Messages & Settings, then Account & System Information, and then Diagnostics.

    c. On the Diagnostics screen, look for the number of the problem channel, and then look above it for the Tuner number (this reads "RecordChannel" in some software versions). This indirectly gives you the number of the CableCARD that is tuned to the channel. Tuner 0 is CableCARD 2, and Tuner 1 is CableCARD 1. (You can confirm this by pressing the CHAN DOWN button until you see the CableCARD Association number.)

    d. If you cannot view any channels on this CableCARD, press the CHAN DOWN button until you see the Signal Lock listing. If the setting is No, or it keeps changing, the CableCARD is not receiving a cable signal. (When the signal keeps changing it means the DVR is searching for - and not finding - a cable signal.)
     
  11. Jan 3, 2008 #51 of 140
    shane_pcs

    shane_pcs New Member

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    Jan 2, 2008
    Frisco, TX
    I am also having this issue in the Dallas area. I thought they had deactivated some of my channels. Turns out I just have to reboot the device. What a pain.
     
  12. Jan 3, 2008 #52 of 140
    dwiller

    dwiller New Member

    29
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    Sep 28, 2001
    Boston, MA, USA
    Yup, reboots not working here either. This is terrible. Just terrible. I redid Guided Setup last night after adding my antenna back into the the mix so at least I can record the local HD channels off air. After redoing Guided Setup, I had basic cable channels working and the 200 tier, but nothing above the 400s. So no Music Choice in the 500s and none of my HD in the 800s. Annoying. At this point, I don't know if I should ditch most of my cable service, because what's the point in paying $150/month if I'm not getting the channels, or if I should just suck it up and go back to the Comcast DVR (and hope I can get one that has the TiVo service) which makes my current Series 3 with lifetime service a boat anchor. I just don't get it and I don't know why TiVo hasn't responded to this thread.
     
  13. Jan 3, 2008 #53 of 140
    drhump

    drhump el duderino

    122
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    Oct 13, 2003
    i am also experiencing this issue on one of my Series3's. I have Verizon FiOS with 2 singlestream cards. Haven't tried to reboot because i have a Seagate FreeAgent Pro attached to it and rebooting is dicey.
     
  14. Jan 3, 2008 #54 of 140
    superunknown911

    superunknown911 New Member

    3
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    Dec 30, 2006
    Is anyone experiencing this issue with Cox and Single Stream cards or is the issue only appearing with the Multi Streams? I may consider switching ot two single stream cards if it will fix the issue. Otherwise, going to sell my TivoHD and go to Dish. I'm so fed up, and now a reboot is not fixing it.
     
  15. Jan 3, 2008 #55 of 140
    yroca

    yroca New Member

    48
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    Dec 6, 2004
    I have a single M-Card. Cox is coming out Saturday - they looked at my signal strength history and said about 2 weeks ago, the signal definitely dropped. That was about the time they were switching out equipment in my neighborhood. I will post again Saturday afternoon with an update.
     
  16. Jan 3, 2008 #56 of 140
    nirvanayoda

    nirvanayoda New Member

    36
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    Aug 11, 2006
    Just to clarify: I have a Tivo HD and a Series 3 which both have this problem. I've had a comcast guy out to look at it and he just said to call back if i'm still having problems in a week. That was 2 weeks ago. heh. Definitely a tivo issue.
     
  17. Jan 3, 2008 #57 of 140
    m_jonis

    m_jonis Member

    677
    7
    Jan 3, 2002
    Albany, NY
    I got something similar except mine went Gray. ALL the encrypted HD channels. Nothing else was affected. I went into the Cable Card Menu and ran the diagnostics (where it shows like 6 different items starting with like SAblah blah blah). I have a Scientific Atlanta M-card. It failed every single diagnostic test and said it couldn't open file \something\something

    I rebooted the Tivo HD and it worked fine aftewards.

    Not sure if it's a Tivo problem or the M-card/cable problem.
     
  18. Jan 4, 2008 #58 of 140
    chuvakuhn

    chuvakuhn New Member

    2
    0
    Nov 20, 2007
    I have a fairly new TivoHD with the 9.X software. The cable service is Time Warner Cable Southern Manhattan here in NYC. About a week ago, I started to experience some blank channels(all black screen). Some shows were partially recorded before going blank. I really didn't look too much into this problem since I was going on vacation, I was hoping that the glitch will resolve itself by the time I come back.

    When I got home from vacation two days ago, I checked my TivoHD and it no longer receives any channels except for a limited lineup - both SD and HD. The diagnostic screen show that the blank channels are tuned, with noise ratio of 36-37, but with no picture, and they are not random at all. It looks as if the cable card is only programmed to receive basic channels. The following is what I can receive:

    1 NY1
    2 WCBS
    3 TNT
    4 WNBC
    5 FOX (WNYW)
    7 WABC
    8 TBS
    10 CNN
    11 CW11 (WPIX)
    702 WCBS HDTV
    703 TNT in HD
    704 WNBC HDTV
    705 WNYW HD
    707 WABC HDTV
    708 TBS HD
    709 WWOR HD
    711 WPIX-HD
    713 Thirteen HD

    I tried both a reset and a power down. The blanks channels would show a split second of the picture and then display a cable card screen indicating that I should call the cable company, the phone number, cable card SN and host ID are displayed. It would do this only once on every tuned blank channel after a reset or power down. I called TWC and they tried sending a signal to the card. It worked the first time, I was good for about 5 minutes and then the same channels started to blank out again. A second call to TWC(a long wait) and a second sent signal did nothing. Now I have a scheduled appointment for this Saturday for the cable guy to look into this.

    Very frustrating.

    **When the single Multi-stream cable was first installed, the operator only needed the host ID and not the card SN, as opposed to what is indicated in the Tivo setup guide. I hope this wasn't the cause of the problem.
     
  19. Jan 5, 2008 #59 of 140
    yroca

    yroca New Member

    48
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    Dec 6, 2004
    OK. Cox guy just came and I appear to be 'fixed' - at least for now! I was lucky and got a tech who seemed to know his way around the TiVo interface.

    To recap - my issue was everything was going fine and out of the blue I lost ability to tune most channels (I was only getting 2-22 and 703-715). Reboot seemed to fix it for a while, but then even reboots would not resolve.

    Everybody needs to check a value in the CableCard Diagnostics screen. To get there, go to Messages and Settings, Settings, Remote, CableCARD, & Devices, CableCard Decoder, Configure CableCard1 (at least for me with single M-card), CableCARD Menu.

    Once in the CableCARD Menu, choose "SA CablceCard CA Screen" and Goto Page 2. You should see a "SubExpireTime". Mine was December 26, 2007, 5:04PM. The tech indicate this meant my CableCard was no longer authorized. He went out to the truck - to his laptop to reauthorize it - and came back in and all the channels were back. The new date says February 4, 2008, 12:48PM.

    I asked him why they had to roll truck to discover this, and he seemed to indicate they can't see the SubExpireTime from their side, but I am guessing if you see a date in the value that is in the past, you may be able to call in and have them reauthorize your card (instead of 'hitting' it).

    Hopefully this post can be of help to the many of you who were experiencing something similar.
     
  20. Jan 6, 2008 #60 of 140
    sk1069

    sk1069 New Member

    1
    0
    Jan 6, 2008
    yroca, I could kiss you!!!

    I have Cox Phoenix as well, and this problem was driving me nuts. I had a tech scheduled to come out on Saturday, but I had to cancel due to a family member with the flu. I was going to call and reschedule, but then I saw your post.

    I called Cox, and the representative I talked to was a little reluctant to believe me. I had to convince him by reading him your forum post. He reauthorized and re-hit me. I restarted the TiVo and the channels were back. The "SubExpireTime" now says February 5th, 2008. Hopefully this Cox Rep will remember what happened and spread the word on how to fix it.

    My only question is, what happens on February 5th? Will I have to call in again on February 6th or will Cox have figured it out by then?

    Thanks again for posting the solution! :D
     

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