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Broken?

Discussion in 'TiVo Help Center' started by MOMLM, Nov 23, 2011.

  1. MOMLM

    MOMLM New Member

    1
    0
    Nov 23, 2011
    My TiVo HD died.... the lights on the front of the box no longer light up and it sounds like the hard drive is making a clicking noise about once a second. Do you think replacing the hard drive will bring it back to life? I have lifetime service on the box so I would like to get it up and running if possible.
     
  2. steve614

    steve614 what ru lookin at?

    10,722
    0
    May 1, 2006
    Dallas, TX
    Replacing the hard drive MIGHT bring it back. The problem could also be the power supply, which can also be replaced.

    From your description, it's hard to determine which component could be the problem.
    First, open the Tivo (AFTER you unplug it) and look at the power supply. Pay attention to the cylindrical capacitors. They should all be completely flat on top. If any of them have a slight bulge, they're most likely bad.


    [​IMG]


    You may have to end up replacing the hard drive AND the power supply. It would be worth it since your Tivo has lifetime on it.
     
  3. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    That clicking noise could be the hard drive or could be the power supply turning on and off (ordinarily the power supply isn't supposed to make any noise).

    And now that I think about it, the only way a bad hard drive (instead of a bad power supply) could cause your symptoms (no lights on the front before the motherboard even gets far enough into the boot process to check to see if there's a hard drive there--even if you took the hard drive out the front should light and your TV should show the initial "Welcome, starting up" screen, which is stored on the motherboard and not the drive) is if the drive had developed a short or near short and was causing the power supply's automatic protective circuit to shut it down, after which it would try to start again and shut down again.

    The chances of that particular problem with the hard drive are very remote and the chances of your power supply being a victim of "capacitor disease", or, as wikipedia calls it, "capacitor plague", are much, much more likely, as it's been happening to Series 2 and Series 3 owners quite a bit lately (I've bought and repaired 2 myself this year, the most recent an HD).

    Have you ever disassembled a piece of electronics gear?

    How large a city do you live in? (wondering what parts and repair resources are availible to you)
     
  4. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    That's a very good picture for showing people how subtle the difference can be. Nice find!
     
  5. hillmm

    hillmm New Member

    1
    0
    Mar 12, 2007
    I can't say how much I appreciate the diagnostic info in this thread. Here's my tale of woe -
    I disconnected and moved my Tivo (Philips 704) to clean around it. The vent areas had a build-up of dust, so I vacuumed around them and reconnected it. The fan was spinning, but no power light on the front panel. To say my heart sank is a BIG understatement. Could I have done some ESD damage by vacuuming? I really thought I toasted the motherboard.
    After searching the Help Center, I found this thread. It described the problem and I was relieved to learn that the fan could still be powered up when the power supply is failing.
    When I opened the unit, I saw that one of the 2200 uf caps under the heat sink had the bulged top. The bulge wasn't huge - maybe 1/16 at the most, but the bulge was obvious when compared to the other caps.
    I thought I saw burn marks on the 100 ohm resistor, but after desoldering it and checking it with a multimeter I realized it was some stray goop.
    I ordered the caps from Mouser (Mouser p/n 667-EEU-FR1E222L, 2200 uf, 25VDC) and installed them tonight. It was a bit tricky to get the leads into the holes, but when I switched to holding them with a hemostat I had better control to line them up.
    It was a happy moment when the power light came on and the 'Powering Up' screen appeared! For less than $20 (including shipping) I was able to get it repaired and restore peace to my home.
    Thanks again for the pictures and advice.
    Dave
     
  6. steve614

    steve614 what ru lookin at?

    10,722
    0
    May 1, 2006
    Dallas, TX
    Glad we could help. Don't be a stranger now. :D;)
     
  7. Feb 7, 2012 #7 of 19
    unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Bump to keep this picture handy.

    Should make this thread a sticky.
     
  8. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Bump because I just told someone to search for this thread to look at the picture.
     
  9. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Another bump, same reason.
     
  10. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
  11. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    bump de bump bump, bump
     
  12. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Remind me to ask a moderator to make this a sticky
     
  13. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    One more bump.
     
  14. Teeps

    Teeps Active Member

    1,664
    4
    Aug 16, 2001
    Torrance,Cal...
    So where can I find a list of caps for a TCD648250B?
     
  15. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Have you consulted any of the other threads discussing power supply problems?
     
  16. antalo

    antalo New Member

    185
    0
    May 9, 2001
    San...
    Thanks for this project Scott. Saved me some headaches ordering the caps, however I have problems with S2 power supply, 240040 model.

    You wouldn't happen to have a "Project list for that ? I got mine fixed right now, but I have several other S2s both 240 and 540 series and would be nice to have a list of replacements. I got them listed at "S2 Power supply repair.

    Thanks
     
  17. HerronScott

    HerronScott Well-Known Member

    2,784
    27
    Jan 1, 2002
    Staunton, VA
    Sorry, we went straight from 2 Series 1 units to 2 Series 3 units so never had a Series 2 model. If you have the list of S2 capacitors with capacitance and voltage ratings, we should be able to identify suitable replacements though.

    Scott
     

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