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

HD failure on S3 (THX)

Discussion in 'TiVo Series3 HDTV DVRs' started by sdsvtdriver, Aug 21, 2013.

  1. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    Tools and caps came today. The results are not good so far.

    I replaced the bulging cap (701) and plugged it in. Got the 4 lights and the welcome screen. This screen would stay for a while then all lights would go out and the unit would reboot. Being as I had the new 2TB drive in, I wasn't sure if it was the drive or the power supply (Broke my own "fix one thing at a time" rule). I swapped in the 1TB and plugged it in and got ticking from the PS. When I removed power, the ticking sound faded with more time in between ticks. I reseated the power to the mainboard and the drive connectors and powered up again. Ticking gone, but now I only have a black screen. Fan spins. No lights. Sign of bad power supply (but what part?)

    I pulled the power supply and removed the new cap from 701 again, cleaned the hole, and soldered it in again. Same result. Not sure where to go from here. I have another cap for 701 (ordered extra), not sure if I damaged it by heat or something else is bad. Bad 701 if I recall causes reboots, not lack of video/lights so I'm hesitant to try that without asking here first. All other caps look flat. No leakage.

    Suggestions?

    On another note, I picked up an old S3 this weekend for parts. It does have a bulging 701 on the power supply unfortunately, but it is good enough to send to weaknees if all else fails. I don't want to solder anything on that board until I resolve my S3's issues, else I end up with 2 bad power supplies and I don't think weaknees takes those ones in return :/

    EDIT: Put the other S3's power supply in mine and it boots (albeit without a green light on the front panel...) even with the distended cap.
     
  2. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Use that extra cap to replace 701 on the power supply that works.

    Since weaknees expects power supplies returned for the "core charge" to not work and need fixing I don't think it matters.

    As far as I know they don't accept them for repair, they sell you a working one and give you a partial refund when you send them the old one (which they can then repair without being on a deadline of having an impatient customer calling every day), kind of like radiators and water pumps on a car.

    I'm assuming that you haven't yet had any dealings with them power-supply wise.

    If you get that second supply squared away, maybe we can work a deal on the ticking original.
     
  3. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    The original doesn't tick anymore. It just doesn't work to power up the Tivo. It worked before I replaced 701, so I'm nervous about replacing 701 on my backup. :(

    You're correct that I haven't dealt with Weaknees before w/r/t power supplies. I wonder if they'll still take one as a "core" if it's been soldered against. I'll have to find out.
     
  4. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    I replaced 701 on the non functioning power supply with my spare. same issue. no video / lights. Not sure what I borked on the PS, but I guess I didn't overheat my first new 701 cap.

    Would these other caps near 701 appear to be distended? Ignore my board burn, pls :eek:

    [media]http://i.imgur.com/ugs91GJ.jpg[/media]

    [media]http://i.imgur.com/tTwxviq.jpg[/media]
     
  5. dlfl

    dlfl Cranky old novice

    6,991
    16
    Jul 6, 2006
    Near...
    Bulges aren't apparent in the photos, but the high viewing angle makes slight bulges hard to detect.
     
  6. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    Better pics. http://imgur.com/a/0Ld28
     
  7. dlfl

    dlfl Cranky old novice

    6,991
    16
    Jul 6, 2006
    Near...
    I don't see even slight bulging in those.
     
  8. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    Ok, just making sure I wasn't overlooking anything.

    So my Tivo is back up on the parts machine's power supply. It has a distended 701 but it is working for now. There's an electronics repair place nearby and I'm going to take the parts S3 and the now non functioning power supply to them and have them replace the caps with the parts I have. I either damaged the board or am damaging the caps when I solder them in, so we'll see what they say.

    Appreciate everyone's responses and will update the thread for fun.
     
  9. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Be sure they understand the need to use Low ESR caps rated for 105 degrees C.
     
  10. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    I'm supplying the caps... or I was going to...

    So I put the PS I replaced 701 on into my parts S3 to take it to the shop so they have a complete unit to test the PS in. The parts S3 will boot far enough to test the PS (Bad HD). I take it upstairs and plug it in to confirm it still at least powers on the fan and ... it boots. Light come on... video on the screen, etc.

    Maybe I didn't let the cap cool down enough post soldering before testing?

    Go figure.
     
  11. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Gremlins, obviously.

    :rolleyes:;)

    So do you have a left-over non-working power supply now or what?
     
  12. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    I have 2 working power supplies. :up:

    One all original with distended 701, one with no distended caps.
     
  13. HerronScott

    HerronScott Active Member

    2,748
    19
    Jan 1, 2002
    Staunton, VA
    So there was some issue with the capacitor that you replaced that they fixed for you (bad solder joint or solder bridge)? Did they tell you what the problem was?

    In any case, glad that you have it working.

    Scott
     
  14. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    I didn't take anything to the repair shop yet. Here's the results so far:

    My original PS that I replaced 701 on does not fully power up my S3. It will, however, power up the parts S3 completely (I put a new HD in it).

    The parts PS (with bulging 701) powers up my S3, albeit with 3 LEDs displayed on power up on instead of 4 (no green). Not sure what this means.

    I have no idea why the PS I "fixed" does not power up my S3 but will power up the other. The differences between the two boxes are fan, HD, and lack of cable cards. The fan will come on and the HD spins up and ticks, but no display at all. Maybe the PS isn't putting out enough voltage due to my soldering job or other bad caps.

    Current plan is to take the parts S3 and my "fixed" PS to the shop and have them replace all the caps, including my 701. Then try that PS in my S3. If it works, then take the parts PS with bulging 701 and have that fixed.
     
  15. sfhub

    sfhub Active Member

    1,269
    0
    Jan 6, 2007
    The cablecards can make a difference. My unit that wasn't booting (because of bad caps) would boot with cablecard 2 removed.

    Caps can be bad even without a bulge. Bulge almost always means bad or starting to go bad. However not having bulge doesn't equal good.

    I had to replace the obvious bulged ones on mine C701 and the one next to it.

    It was still having issues. The 3 equals caps right behind C701 looked ok, except for one with an almost not perceptable bulge. They tested ok with ESR meter so I didn't replace them, but later realized the ESR test was pointless in that case because those caps were connected in parallel.

    I ended up pulling and replacing all 3. The one that had the ever so small bulge was bad. The one next to it was totally flat, but bad also. The 3rd one tested ok, but I figured with 2 bad caps in the parallel circuit, the 3rd one probably took on the brunt of the work for a while, so I replaced it also.

    BTW in your original pictures, it looked like the board was burned. Is that just flux or did the board get so heated that the other side burned?

    IMO you should replace more caps because your PS is able to power a lower power usage S3 but not a higher power one (the one with cablecards)
     
  16. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    Update

    My original power supply is back from the electronics repair guy. replaced all the caps except the big one in the back. The results hasn't changed. It will power the parts unit but as before, won't power my main S3. :mad:

    I took out the cable cards, no go. Disconnected everything but video/power, no go. Disconnected HD, no go. Unplugged fan, boot (albeit with 3 lights in front instead of 4). The fan is not the original unit in my main s3. I put parts fan in main S3, and the unit boots, with 3 lights.

    I then put fan from main s3 into parts unit with parts power supply. No go. This fan/PS combo works fine in Main s3. Nothing makes any logical sense here.

    Main s3 with power supply from parts machine and non oem fan - boots.

    Parts s3 with power supply from parts machine and non oem fan - no go

    Main s3 with repaired original power supply and non oem fan - no go

    Main s3 with repaired original power supply and oem fan - boots.

    Parts s3 with repaired original power supply and oem fan - boots

    The parts PS does have a distended 701, but I'm not going to guess at this point that repairing that will power non oem fan.

    I need a drink.
     
  17. Soapm

    Soapm Active Member

    1,564
    0
    May 9, 2007
    So close,...
    A slight difference in load is normal even amongst identical equipment. Do you have a volt meter? You can compare the voltages under load which should tell you if it's the PS. Also check connections, maybe one of the connectors isn't mating just right.

    Can you post pictures of your soldering? If you suspect a cold solder joint then heat the joint with the tip of the iron until you see the solder melt then take the iron away (or add just a touch of solder). If you created a short it should behave identical on both units.
     
  18. Soapm

    Soapm Active Member

    1,564
    0
    May 9, 2007
    So close,...
    See if wiggling the connector causes a change?
     
  19. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    Nothing.

    I put the old (at times noisy) original cofan in the unit and took out the non oem fan. Boots fine. I guess that fan just requires too much power from the main board.
     
  20. sdsvtdriver

    sdsvtdriver Member

    63
    0
    Mar 5, 2008
    Welp, parts Tivo was repaired with new caps. Now I have a complete second working S3. Lucked out and got $99 lifetime added and now I have it online. Thanks for everyone's help!
     

Share This Page