Blinking green light, will not reset, black screen

Discussion in 'TiVo Series3 HDTV DVRs' started by BlaineMurphy, May 19, 2014.

  1. May 19, 2014 #1 of 262
    BlaineMurphy

    BlaineMurphy New Member

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    May 19, 2014
    After a recent electrical storm my Tivo has a constantly blinking green light and will not reset. I am interested in a possible remedy without having to do the "exchange" with TiVo and wish to retain my lifetime service.
    I have the Series 3 HDTV DVR (about 4-5 yrs. old).
     
  2. May 19, 2014 #2 of 262
    lgnad

    lgnad Pantless Mofo

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    Blinking green light is likely either a power supply or motherboard failure. Be careful if you follow these directions, the power supply is open, not in a cage like in a pc and there is possibly danger

    Open the unit, clean it out with compressed air, check connections, and inspect the power supply and motherboard for visible damage from a power surge, and the caps in the power supply for visible bulging on top, or leakage, etc. (bad power supply is often the failure of units of your generation, storms notwithstanding... lots of threads on here)

    Nothing obvious? Then try and power it up with only power connected.. no change? Then power it off and then pull the power from the hard drive... if the tivo then powers up, then its likely the power supply, weakened so that it cant supply enough power to spin up the drive and power up the motherboard at the same time.

    If its the power supply, there are threads on here discuss that in depth... that list all the caps that need replacement, or you can get another power supply and swap it in...
     
  3. May 6, 2015 #3 of 262
    pledoux

    pledoux New Member

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    May 4, 2015
    Thanks, I found one cap and replaced it, but it did not fix it. I am not sure which other caps I should change, do you know where I can get a list of the other caps I should look to replace. Thanks again
     
  4. May 7, 2015 #4 of 262
    unitron

    unitron Well-Known Member

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    There's no doubt a cap is bad if the top is rounded, but if it's not it might still be bad.

    This thread

    http://www.tivocommunity.com/tivo-vb/showthread.php?t=473394

    is fairly long, but in there somewhere are cap lists for the three different possible power supplies, the one used in the original S3, and the two, either of which you might have, used at different times in both the S3 HD and the S3 HD XL.


    Crossing my fingers for you that the problem is not the motherboard itself.
     
  5. May 8, 2015 #5 of 262
    Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    I asked Weaknees about this once. They said that this particular problem is one they've never found a fix for. Once this happens the TiVo is toast.
     
  6. May 9, 2015 #6 of 262
    unitron

    unitron Well-Known Member

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    There's a guy in Australia who can sometimes fix it on their version of the HD, and shortly after I mentioned him here at TCF, weaKnees started saying they could sometimes fix it.

    I suspect it has to do with the CPU's Ball Grid Array mounting or the Surface Mount technique used on some of the other chips and probably something to do with lead free or reduced lead solder as well.

    Also, there are some electrolytic caps on the motherboard, so it's not impossible one or more of them is of the "capacitor plague" type and is going or has gone bad without showing outward signs.

    But you need to use a voltmeter and be sure you're using a problem free power supply before trying to isolate the problem to the motherboard.
     
  7. May 10, 2015 #7 of 262
    timhbtr53

    timhbtr53 Grumpy Old Man

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    "Unitron" I have heard of users heating up the onboard memory with a hair dryer and getting the TiVo to power up. I wonder if the onboard memory might have a cold solder problem that's rearing it ugly head? And what they call on board memory could be video mem. I pulled a CPU of a HD last night "from a toasted board" it's a Broadcom CPU. I would love to get my hands on a unsubed HD board that's stuck in flashing green light and trace it down with the oscope.
     
  8. May 12, 2015 #8 of 262
    gkottner

    gkottner Member

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    I believe I have just the TiVo HD you need. I had the flashing green light and had PM'd you about checking the power supply for me. The hair dryer worked a couple times for me, but eventually that stopped working. I ended up just getting another Roamio. The HD is sitting in the basement gathering dust. PM me the shipping details and I'll get it out in the next week or so.
     
  9. May 12, 2015 #9 of 262
    timhbtr53

    timhbtr53 Grumpy Old Man

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    I Sent you a new message and lets see what we can do.

    Thanks so much for a victim to test with.
     
    Last edited: May 12, 2015
  10. May 13, 2015 #10 of 262
    unitron

    unitron Well-Known Member

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    Whatever you learn, PM or email it to me a few days before going public.

    :D

    (It won't make me any money, I just want to feel smug for a little while)
     
  11. May 14, 2015 #11 of 262
    timhbtr53

    timhbtr53 Grumpy Old Man

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    If I figure it out I will pm you...
     
  12. May 14, 2015 #12 of 262
    gkottner

    gkottner Member

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    I'm looking to get it out next Tuesday or Wednesday.
     
  13. May 14, 2015 #13 of 262
    timhbtr53

    timhbtr53 Grumpy Old Man

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    I have power supply and a front panel so all I need is the main board cut down on shipping cost.
    Thanks for the kind use of your board...:eek:
     
  14. May 16, 2015 #14 of 262
    CrashHD

    CrashHD I am the me.

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    I have one with the same symptoms. If you develop a solution and need a second test, let me know. I'm not particularly attached to this one, over a year or two I bought 5 broken lifetime S3's/THD's for cheap, and repaired either power supply caps, or hard drives. 80% success rate is fair for what I put in them, but 100% would sound better.
     
  15. May 19, 2015 #15 of 262
    gkottner

    gkottner Member

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    I'm sending it from work, so it shouldn't be that much. I was just planning on sending the whole thing.
     
  16. May 22, 2015 #16 of 262
    timhbtr53

    timhbtr53 Grumpy Old Man

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    unitron I hope you see this, This is a crazy one here... The unit will post super fast then the blinking light and the fan is not working. I tested voltage the 5 volt line was a little low so I put my recapped P/S in and same thing super fast post no fan blinking green... I have a A/C that pop it's top on the run/start cap today so I have to find a cap in the morning but the fan part is got me thinking something is not resetting the CPU.... Will keep you updated
     
    Last edited: May 22, 2015
  17. May 22, 2015 #17 of 262
    timhbtr53

    timhbtr53 Grumpy Old Man

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    I got the TiVo to boot. I'm going to let it run tonight. I think it's the memory on the board. I reseated the cpu cleaned up a lot of old bad solder. It might take some time but I hope I can get it fixed.
     
  18. May 23, 2015 #18 of 262
    CrashHD

    CrashHD I am the me.

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    Nov 10, 2006
    MO, USA
    That is awesome!!
     
  19. May 27, 2015 #19 of 262
    timhbtr53

    timhbtr53 Grumpy Old Man

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    I have it down to one memory chip. U800 the first memory chip to the front of the HD has been running VERY hot. I can heat that chip up and it will power right up no where else will that work. I pulled two chips off my parts board and going to float off the bad chip then a good clean up and refloat a chip down and keep my fingers crossed for no cold solder joint or bridges.
     
  20. May 28, 2015 #20 of 262
    timhbtr53

    timhbtr53 Grumpy Old Man

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    _____________________________________________________________
    With u800 out of the circuit I get the same no power blinking green... Now it's clean and seat the new used chip...
     

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