1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

S3 Motherboard ?

Discussion in 'TiVo Series3 HDTV DVRs' started by Toshirick, Oct 31, 2013.

  1. Toshirick

    Toshirick New Member

    35
    0
    Mar 19, 2006
    So Cal
    My tivo symptoms make no sense.

    You were a big help and I appreciate all your help.

    Thanks again-Rick
     
  2. ip4networkers

    ip4networkers New Member

    1
    0
    Dec 12, 2013
    India
    Thanks for sharing stuff..I'm also thinking to purchase caps C701 and C702..Waiting more updates from your end.
     
  3. buscuitboy

    buscuitboy New Member

    736
    0
    Aug 8, 2005
    Atlanta area
    I am possibly having a similar problem. I have two identical series 3 (OLED). One works great, the other is stuck in a reboot loop. I swapped the power supply & hard drive from working TiVo A into non-working TiVo B and none of it worked. TiVo B continued to be in a reboot loop. I even had BOTH Tivo power supplies checked out a local repair shop. One buldging cap was replaced on both and all others were tested and are OK.

    I am at a total loss at what else it could be, but I see from here that removing the fan (connected to motherboard) from a rebooting TiVo helped solved the problem. I am going to try this. If this does indeed help solve the problem, there any way of installing a fan in the TiVo that can then be somehow plugged into a different source other than the TiVo's equipment? In other words, a fan of some kind that can be plugged into a regular outlet.
     
  4. unitron

    unitron Active Member

    16,389
    2
    Apr 28, 2006
    semi-coastal NC
    If leaving the fan unplugged seems to solve the problem, then either the fan can somehow momentarily draw enough current to drag down the +12 V line enough to reset the CPU, or there's something wrong with the fan controller circuitry on the motherboard that drags down the +12 V line, and not having the fan hooked up keeps from completing a circuit that needs to be completed for the fan controller's problem to manifest itself.

    Take the fan from the 648 that's not auto-rebooting and hook it to the re-booting board, and see if it still reboots. If it does, then it's the motherboard's fan circuitry.

    If not, it's the fan previously connected.
     
  5. buscuitboy

    buscuitboy New Member

    736
    0
    Aug 8, 2005
    Atlanta area
    If this is the case, is it still possible to have the TiVo fully operate without this fan connected at all to the motherboard? Then maybe find some other solution for cooling the unit? Or will this not really work? I only ask cause the previous poster was saying how when they had the fan unhooked, the unit worked



    OK, I will try this. If its the fan, can I use a fan from a TiVO HD (TCD652160) in this Series 3 (OLED)? I actually have two spare TiVO HDs in a closet that are fully working, but not subscribed to & hoping I could use its fan. Or is it like their power supplies and totally incompatible?

    If its the motherboard's fan circuitry, is there a way to fix this?
     
  6. unitron

    unitron Active Member

    16,389
    2
    Apr 28, 2006
    semi-coastal NC

    Forgive me, but I'm not currently in a position to open up a 648 and a 652 and compare the fans, but take a tape measure and compare the screw spacing from the outside back of the cases. If it's the same you should be able to do the swap.

    Once you remove the fans from the chassis you should be able to see on the label how many Amperes, or milliAmperes, each draws, or maybe it'll be rated in Watts, and if the two figures are fairly close in value there shouldn't be any problem swapping on for the other.

    If one's in A and the other in W, multiply the A by 12 V to get W.

    In other words, for DC, Volts times Amps equals Watts, or electromotive force (i.e., difference in potential) times current equals power.

    If it's the fan circuitry on the motherboard, it might be fixable but without a schematic or service manual (a couple of mythical creatures where TiVos are concerned, it would seem), it would be what a repair shop would label "beyond economical repair" due to the time necessary to try to figure out which components on the board are or are not part of that circuit.

    Easier to wire the fan straight to the +12V supply and let it run full speed all the time.

    I'll look around for a source of 2 pin headers with attached wires that can be connected to the power supply and then the fan just plugged onto the header.


    And actually the 648 and 652 power supplies themselves are almost compatible.

    You can't risk connecting a 648 supply to a 652 motherboard because no one's yet bothered to see what the unneccessary gray wire 7.5 V of the 648 supply would connect to when plugged into a 652 board--in other words, would it short to something.

    But the 652 supply should run the 648 board except for the OLED display which, as I understand it, the gray wire feeds.

    Except for that gray wire the pinout of the plug is the same, and the current ratings of the various output voltages is close enough for short tests.
     
  7. buscuitboy

    buscuitboy New Member

    736
    0
    Aug 8, 2005
    Atlanta area
    OK, I ran out of options for this S3 (OLED) & more or less gave up. From a fully functional identical S3, I tried swapping power supplies, hard drives, and fans. Even totally re-imaged a fully functional drive in a PC & with WinMFS. NONE of this worked and the S3 in question could never get past the "Welcome, Powering up" screen and was still in a reboot loop.

    I was gonna cut my losses & put it up on ebay thinking maybe someone else would have more knowledge & some luck with it. Then put that money toward either a Roamio or mini (since I have a 4-tuner premiere). However, I decided to give TiVo a call and see if they could maybe offer me something for it and/or another solution. Well, after the initial customer service rep past me on to a technical rep that could possibly help with this problem, they then had me do some test and nothing work (& I knew they wouldn't).

    In the end, they basically offered me a 500GB 2-tuner refurb TiVo Premiere for $79 and also transferred the lifetime subscription from this non-working S3 to the new Premiere at no additional cost. Now, I do have to mail this old S3 back to them (at their expense) and had to pay a $100 deposit up front. I will get the $100 back when I mail the non-working S3 back into them.

    I was a little skeptical and kept asking questions to verify it and make sure I understood it all correctly. I jumped on it & sure enough, a few days later I got confirmation that the 2-tuner premiere was on its way from TX. I also looked in my account and the old S3 service number had been replaced by the new one that was on its way. It was still listed as lifetime service too.

    Now, I think part of the catch here might have been the fact that I got this S3 on a $99 lifetime back in May 2013. I started having this issue probably in about August 2013 so I am sure they could also see that it hadn't connected to their servers since then and was essentially only on lifetime for about 3 months.

    The rep told me something about since it had been less than a year, they were able to do this complete swap. Whatever & I didn't complain. At first I was gonna think about it, but I was afraid if I called back to try and get this deal again, I would get another rep who wouldn't offer it & tell me that was an error so I jumped on it right there. I figured worse comes to worse and I could sell it on ebay or Craigslist and easily make back the cost.

    I got it and it works good. I'll be packing up the broken S3 here & sending it to them, but not without some level of remorse as my other S3 is still working good and I still love them with their front display that shows the clock & recording status. I see other posts here and how Series 3s seem to now be dropping like flies so I wonder how much longer I will truly have with this other beloved & working S3 (OLED). Oh well.
     
  8. unitron

    unitron Active Member

    16,389
    2
    Apr 28, 2006
    semi-coastal NC
    bb, when you got the $99 lifetime deal on that S3, was it in conjunction with purchasing a new S4 or S5?

    I'm curious as to why they'd want that S3 bad enough to pay shipping (which is about the worth of an S3 with a bad mobo), and I wonder if they got confused about what model they're getting back.
     
  9. buscuitboy

    buscuitboy New Member

    736
    0
    Aug 8, 2005
    Atlanta area

    Nope, I didn't purchase any other hardware (Roamio and/or new S4). back in about March 2013, I basically had initially subscribed to this S3 on a monthly basis for about 2 months. Then called to cancel and they offered me the $99 lifetime right there. I took it and then 3 months later this S3 went on the fritz on me. Not sure if it mattered then or now, but I do also have about 4 other TiVos on my account as well (Series 3s and some Premieres)

    The rep seemed to indicate to me (whether an error or not), that since the lifetime on the S3 had been less than a year (& maybe saw that it was only working for about 3 months in lifetime mode), this is why they were able to do it. I thought the same thing in that maybe he didn't truly realize it was a Series 3 that was in question here and only took note of the dates in question & billing history that are listed on my account. Therefore, possibly made an error, but I'm not complaining.

    Back in May 2013 when I got the $99 lifetime, I remember them clearly stating that lifetimes are not transferable at all & I never expected this to take place. Again, maybe they made an exception here since lifetime was basically only active & useable for 3 months, but who knows what would have happen if I thought about it and called back. Hence the reason I jumped on this offer right away and took it on the spot.
     

Share This Page