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Tivo HD Pixelation Troubleshooting

Discussion in 'TiVo Series3 HDTV DVRs' started by Chimpware, Aug 3, 2007.

  1. slyone

    slyone New Member

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    Jul 22, 2005
    LOL, Thats exactly what it was! I feel soo stupid, the ribbon on board was lifted way up on one side..Thanks! Thanks for all the guidance too Unitron, This is f..ing awesome! Picture looks great again even with all my draws on the usb's. I really kinda wanted to do the soldering myself and almost bought the $50.00 kit at RS today but was apprehensive on possibly screwing it up:( I never really did any soldering let alone fine detailed work as this.
     
  2. unitron

    unitron Active Member

    16,400
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    Apr 28, 2006
    semi-coastal NC
    It's probably one of the simplest and easiest soldering jobs (except for the TiVo power supplies in the S2s where the heat sink bends over at the top and makes it harder to maneuver the caps underneath), but the important thing is you once again have TiVo.
     
  3. slyone

    slyone New Member

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    Jul 22, 2005
    Exactly:) Wow, how I've come to depend on dvr-ing and having 2 tuners. just an update, all is working perfectly!!
     
  4. Mar 5, 2014 #1584 of 1598
    DeeSeven

    DeeSeven New Member

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    Dec 6, 2012
    I've had some pixelation issues and what not and finally got most of them either fixed using an attenuator and replacing cables. Now I still get pixelation in some channels can I put 2 attenuators together to see if that would improve it? or am I just wasting my time?
     
  5. Mar 5, 2014 #1585 of 1598
    dlfl

    dlfl Cranky old novice

    7,052
    26
    Jul 6, 2006
    Dayton OH
    You can cascade attenuators but you need to know whether signal strength is really your problem. While tuned to a pixelating channel, got to DVR Diagnostics and see what the SNR, Signal Strength and RS Error counts are for that channel.
     
  6. slyone

    slyone New Member

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    Jul 22, 2005
    Well...after spending a whole 15.00 for top-quality Panasonic caps from digi-key, then another 50.00 for local install and having it work flawlessly(Thanks to this thread), I'd say you're wasting your time.
     
  7. guava

    guava New Member

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    Dec 31, 2007
    cool, here's my experience:
    http://www.tivocommunity.com/tivo-vb/showthread.php?t=515931
     
  8. dantruong

    dantruong New Member

    5
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    Apr 20, 2014
    new york
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    Last edited: Jan 30, 2017
  9. dlfl

    dlfl Cranky old novice

    7,052
    26
    Jul 6, 2006
    Dayton OH
    I see from your other post you are using old TiVo software. Get that updated before doing anything else. There are many possible causes for macro-blocking and you are not likely to get much help from either Tivo or cable co support.

    It could be a failing hard drive. You have an expander drive so it could be either drive or the expander case electronics or the SATA cable connection. Start by reseating or replacing that cable.

    It could be failing capacitors in the power supply, which must be replaced. See this thread:
    http://www.tivocommunity.com/tivo-vb/showthread.php?t=473394
    Look at the power supply capacitors and see if any are bulging like this:
    http://www.tivocommunity.com/tivo-vb/showthread.php?p=8750894#post8750894

    Tivo's will macro-block if the signal is too strong. Since all your channels are at 100 you may have this issue. They may be a lot more than 100. Insert an inline attenuator or additional splitter to decrease the signal.
     
  10. HerronScott

    HerronScott Well-Known Member

    3,264
    101
    Jan 1, 2002
    Staunton, VA
    I recall this was an issue with Cisco/SA CableCards in the initial release of the Series 3 OLED software that was fixed with one of the first updates.

    Scott
     
  11. SCSIRAID

    SCSIRAID Active Member

    2,323
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    Feb 2, 2003
    Vero Beach, FL
    Macroblocking on a TiVo menu is very unlikely to have anything to do with your RF signal level or the cablecards. I would expect that kind of effect to be relative to HDCP compatibility between the display and the TiVo.
     
  12. dlfl

    dlfl Cranky old novice

    7,052
    26
    Jul 6, 2006
    Dayton OH
    But he said he had macro-blocking on "hi-def" and "digital" channels, every 3 to 10 mins. :confused:

    I can't imagine how he could still be running 8.2 or 9.2 software, as he stated in another thread,
    http://www.tivocommunity.com/tivo-vb/showthread.php?p=10081122#post10081122
    but seems like that should be corrected before worrying about any other issue. Software that old must not have the fix for the sdv switching glitch that **you** were instrumental in getting Tivo to fix (and thanks again!).
     
  13. SCSIRAID

    SCSIRAID Active Member

    2,323
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    Feb 2, 2003
    Vero Beach, FL
    He also said... 'no macro-blocking on analogue channels or QAM, occasional very minor macro-blocking on menus'. This is what led to my comment.

    Agree... not sure how he could be on software that old and that certainly needs fixed.

    The best way to prove signal issues is to watch live until you see macroblocking and then check DVR Diags RS uncorrected counts (of course check counts when you start the experiment)... assuming the TiVo is on current software. This is the acid test.

    You're welcome... ;)
     
  14. sepstein

    sepstein Tivolutionary

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    Sep 26, 2002
    Boston, MA
    Goodness, not sure if this is answered in 54 pages of forum posts, but I think what I have going on *might* be different.

    When tuned to SD channels, no difficulties at all. This includes digital channels. No RS errors, etc.

    When tuned to HD channels, the picture pixelates and stutters after a second or two. The sound also stutters. A few more seconds and the TiVo pretty much comes to a halt. I can get the TiVo to become responsive again by removing the cable input. Reattaching the cable input will provoke the issue again (unless I tune to an SD station while the cable is disconnected).

    I tried changing the output to native vs. 1080i fixed without resolution.
    I tried changing the output from HDMI to component without resolution.

    When tuned to the HD channels, I do get a number of RS errors (I'm assuming that RS corrected and RS uncorrected refer to errors).

    Playback of previously recorded HD material is fine - no problems.

    TiVo software is 11.0m.

    Best guess that I have is that the TiVo is having difficulty recording the HD signal. Signal strength from the cable card is between 86 and 90, and SNR 34. I have not made any changes to the configuration in months, so hard to understand why this is now occuring where the DVR had been symptom free for months.

    Issue with the signal? The hard drive? A software update I wasn't aware of?

    A couple of years ago I did have a similar problem and temporarily mothballed the TiVo and upgraded to Premier units. I brought the Series 3 back into service for a guest room and it has been working fine for about a year until now.

    Any help appreciated!

    Steve
     
  15. unitron

    unitron Active Member

    16,400
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    Apr 28, 2006
    semi-coastal NC
    Somewhere around here I read something sometime back about clearing something up by temporarily disconnecting the cable.

    Yeah, real helpful, I know.

    But, maybe you should check that the cable is still properly grounded where it enters the house, and since it is a Series 3, check the power supply's DC output voltages with a voltmeter. Once they start to sag, you can get all sorts of strange symptoms.

    Good news is simple soldering job and $10 worth of replacement capacitors will probably straighten that out if that's the source of the trouble.
     
  16. MatrixOutsider

    MatrixOutsider Member

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    Mar 7, 2003
    Hartsdale, NY
    I am getting pixelation on a few channels with Fios and a cable card on my Series 3 HD.
    This TV is the primary TV and is fed from a line going in to the house and a splitter.

    The problem started two weeks ago and is getting worse. On some channels, the signal goes from 0 to 56 and is not steady. The SNR is hovering around 31. I changed cables, but the problem remains.

    Also, my Roamio in another room is fed from the same splitter, but it is getting excellent signal with no pixelation. My conclusion is that the Series 3 HD Tivo has a defective power supply. Is this correct? Can I replace the whole supply or should I just replace the capacitors?
     
    Last edited: Jan 10, 2016
  17. Oct 5, 2016 #1597 of 1598
    FaFaFooey

    FaFaFooey New Member

    5
    0
    Sep 25, 2012
    North...
    I was having horrible, unwatchable pixelation on all my HD and SD channels that started getting worse over the course of the week. I called time warner assuming it was a poor signal kind of problem. The tech came out to check the line and said the signal was fine and it must be my HD XL. In turn, I bought signal amplifiers and attenuators, because I'm stubborn and didn't believe what the tech told me. I thought it had to be the signal. I tried swapping/upgrading the hard drives, which I was planning on doing anyway.

    In the end, it turned out to be the power supply. I swapped it with an old one from a dead HD XL unit and no more pixelation. Crystal clear.
     
  18. bicycleguy

    bicycleguy New Member

    2
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    Jan 26, 2017
    I too had unwatchable pixelation starting around January 9, 2017. See my post about it in the Bad Cap thread #534.

    Hard to believe, but changing the caps out, even with a poor FIOS signal fixed it. Ya!
     

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