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Toshiba SD-H400 - Is the tuner dead?

Discussion in 'DVD TiVo Units (Archive)' started by dmk1974, Dec 10, 2009.

  1. klalex

    klalex New Member

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    Nov 14, 2006
    After a couple more power on/offs of everything (and no UPS) it's working again. But, for how long? And, what can I do in the meantime as preventive? (Thank God for Amazon. It's iced over out there in OKC today!)

    So, in a nutshell, this is an (A) Power in the living room is fickle; or (B) signal in the living room is flakey? Do you all concur, my dear TiVo gurus.

    Happy Holidays to each of you. May your TiVos work throughout the New Year!
     
  2. klalex

    klalex New Member

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    Nov 14, 2006
    I meant to let you know that the Coax was never plugged through the UPS. Only the power cord of the TV and the TiVo. The TV was plugged into one of the "Surge Protection" outlets and the TiVo was plugged into the "Backup Power & Surge Protection Outlet."
     
  3. klalex

    klalex New Member

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    Nov 14, 2006
    "REPLACE CAPACITOR." I will search the threads for information on that. I'm willing to try, although I don't know squat about electrical technology. But, I can follow directions, safety measures, and have a decent dose of both patience and brains. There's a Radio Shack nearby, and of course there's Amazon!

    FYI: I did replace a hard drive in one of the TiVos a couple years ago. I know it's not rocket science, but I did just have to Google what a "capacitor" was...
     
  4. unitron

    unitron Active Member

    16,387
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    Apr 28, 2006
    semi-coastal NC
    The kind of capacitors you will need if you need them will not be found at Radio Shack--and it's very likely you won't find anyone working there who understands the difference between the kind they carry and the kind (low ESR and rated for 105 degrees celsius/centigrade) the TiVo power supply needs. Also they have to be the same rating in microFarads (uF) as the bad ones to be replaced, and rated at or a bit above the voltage rating of the ones being replaced.

    Read the wikipedia page on "capacitor plague" to get an idea of what's going on.


    Here's a thread that talks about the problem in S3s

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


    and here's one with steve614's excellent photographic example of how subtle the visual signs of a bad one can be

    http://www.tivocommunity.com/tivo-vb/showthread.php?t=479176

    although you could have one or more bad capacitors that don't show any visible signs.

    Is there a halfway decent TV repair shop in your area?

    What you do is ask if they know how to fix single layer board switching power supplies with bogus low ESR caps.

    If it's the right place, they'll understand what I just said.

    That's if your power supply has started going bad yet, in which case $20 to $50 to fix it (with about $10 or less of that being for the caps) will likely be cheaper than a replacement supply if you can find one.

    But don't give up checking the possibility that the signal is weaker in one room than the other. If the living room cable was installed years ago and then someone came back and put in a splitter and ran a line to the bedroom more recently, you've probably got newer, better cable running to the bedroom.
     
  5. unitron

    unitron Active Member

    16,387
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    Apr 28, 2006
    semi-coastal NC
    Apologies, I meant to get back to you on this and got lost or sidetracked or both.

    Yes, a tape playing in that old VCR will do, anything to get it to put a channel 3 or channel 4 type signal on its RF output connected to the RF input of the TiVo.

    What we want to do is ignore the TiVo's RCA inputs for now and just give it something that looks to it like an analog cable or pre-digital over the air signal and see if anything can get through its tuner.

    You don't have to do guided setup or anything, just use the number pad and plug in channel 2 and then 3 and then 4 and 5 and 6.
     
  6. jwood6203

    jwood6203 New Member

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    Dec 19, 2012
    DM3-

    I used a Zenith Digital TV Tuner Converter Box DTT901...the antenna was a 2 dollar Walmart special...all coax hookups...Once I knew I had a channel from the converter box - I put that in the Tivo's signal input (coax), did a restart of the Tivo and went to the "change video hook up" page and coax was the only option there for me. Still working fine now.
     
  7. newbs

    newbs New Member

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    Sep 2, 2004
    Sorry to resurrect this old thread, but I'm having the same issue with my SDH400. I've had it happen before, and with a couple of reboots I have been able to recover from the black "searching for signal" screen, but this is the first time I've had to do it post Comcast's conversion to all digital. I do have the digital to analog converter from Comcast, which was working fine up to the reboot, but now I am no longer able to get a choice to select the coax input.

    I seem to vaguely recall that there was some other tip about connecting something to the S-Video port or something. Am I just confusing that with another issue? Unfortunately I don't have a portable TV handy to test things, nor a separate way of generating analog signals on the coax line. Do I need to go out and buy an antenna to try to fool the system? I know these machines are old, but any chance we can get Tivo/Toshiba to address this known bug in their software? Seems like it just needs a way to "force" the coax input to be selected.
     
  8. unitron

    unitron Active Member

    16,387
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    Apr 28, 2006
    semi-coastal NC
    Why would you need a portable TV?

    Does the comcast box only have an RF out? No line level?

    Is whatever video display technology into which you feed the TiVo's output line level only and not capable of analog tuning to channel 3 or 4?
     
  9. newbs

    newbs New Member

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    Sep 2, 2004
    Yes, the Comcast box only has an RF output, no composite or other video outputs.

    It is technically capable of analog tuning, but it is a PITA. First, the setup makes getting back behind the display to swap connections around difficult to access (I guess that one is my fault). Also, since Comcast has gone digital, I have it tuning only digital channels. I think in order to get it to see analog channels, I'd have to do a re-scan with the Comcast box hooked up, and then another re-scan later to get all of the digital channels back and then reprogram all of my favorites, eliminate the unwanted digital channels, etc.

    I'd rather not go through that if there is any other way to force the Tivo to pick the coax input. My setup was working fine up until the recent power cycle. Would going through the guided setup on the Tivo force it to look at the coax in?
     
  10. unitron

    unitron Active Member

    16,387
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    Apr 28, 2006
    semi-coastal NC
    With the cable box co-ax out connected to the TiVo's RF in, can you manually tune the TiVo to 3 or 4 and see the cable box's output?
     
  11. newbs

    newbs New Member

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    Sep 2, 2004
    I tried this last night, but it didn't work. I think the TiVo is only looking for the signal on the composite video inputs and not the coax. When I try to change the input in the "Video" option under Settings, it is only showing the option of connecting the cable box through the composite video input. There isn't a choice to select the coax input.
     
  12. unitron

    unitron Active Member

    16,387
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    Apr 28, 2006
    semi-coastal NC
    Maybe you need to lie to it about which cable box you have so it thinks you have one with only RF outputs.
     
  13. bibbli

    bibbli New Member

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    Mar 17, 2013
    I was able to resurrect mine...I wish I could explain how. I'd lost video after a fuse in the house had blown. I tried repeating guided setup several times, no luck. I played the waiting game and simply powered it off for several days. No indication that helped. I tried settings > video hookup repeatedly and it would only give me the option to hook up using the composite input. Just today, after it had been powered down for several days, i opened it up to check for anything unusual (bulging capacitors or anything else i might recognize). I carefully pulled and reseated a ribbon cable or two, even carefully gave some parts a safe push just to satisfy myself that I was doing something potentially useful. When I hooked it back up to the coax out (from my comcast DTA), powered up and went to settings > video input, it paused for a moment and finally asked me if I could see video (while showing video in the background!). Who knows what did it, but it seems to indicate that something was confused and not permanently disabled. It's as if something was somehow reset. I did not try to fool it into thinking it was seeing an analog cable from an antenna, FYI. No idea how I lifted the spell...but glad it's back. Good luck. For those not used to digging into the innards: If you choose to noodle around on the inside, insure you've touched something metalic to discharge static and don't do things like touch capacitor terminals.
     
  14. unitron

    unitron Active Member

    16,387
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    Apr 28, 2006
    semi-coastal NC
    ALWAYS KNOW WHERE BOTH ENDS OF THE POWER CORD ARE!

    And unplug from the wall socket before opening up the TiVo and poking around inside.

    The only time to have the lid off and the TiVo plugged in is if you're actually doing voltage measurements.
     
  15. bibbli

    bibbli New Member

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    Mar 17, 2013
    An update: I powered down my SD-H400 by switching off a power strip to protect it against an impending thunderstorm (and potential outage) only to knock it out again! Fortunately I was able to resurrect it again also.

    The sequence of events went like this: 4-6 occasions of powering down/up the unit by unplugging the rear power cable and letting it rest for a few minutes. The boot process is very slow so I'd check up on it without standing over it, took a day and a half all told. I believe a re-ran guided setup at least once. Every time I'd power back up, i'd go right to settings > video hookup. It never gave me an option, so much as either show me the composite hookup diagram (to which I would always bail out by hitting the tivo button and power cycle the unit again), or occasionally it would show me a totally blank screen asking me if I could see video in the background. After about the 6th occasion of it showing me the dark background state, instead of bailing out of that screen and power cycling again I selected yes (as if I could see video) even though it was a blank screen. It then asked me if I had a cable box, what sort of DTA box I had (etc), and when complete lead me to tivo central. When I proceeded right back into settings > video hookup, it asked if i could see background video, but this time there was a picture.

    Worth noting that when I re-ran guided setup either once or twice, on the last occasion I proceeded with all my usual settings. I didn't attempt to try a different type of signal (i.e. antenna). That might work for someone else, but it didn't seem to play into my scenario. Hope that helps someone. What a major ambiguous pain in the arse. Impossible to know how much of what I did actually had an effect or if it was just dumb luck with the right combination of actions.
     
  16. klalex

    klalex New Member

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    Nov 14, 2006
    Can someone point me to the correct thread to find out about current television models that will work with the Toshiba SH-H400 and the Toshiba TiVo REMOTE CONTROL. I want to replace a television but had issues a few years ago finding one that I could match via the codes to get working. I can only imagine that this far down the road (with 9+ year old remotes) the problem of finding a new tv is only more of a challenge. Something small (relative) - around the 36" range give or take.

    Hoping there's a discussion on here, but my searches aren't getting me anywhere.

    Thanks.
     
  17. AlanBDahl

    AlanBDahl New Member

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    Jul 13, 2004
    None of the other suggested fixes seemed to help with mine so as a last-ditch attempt I took the cover off. Nothing seemed amiss inside but there was tons of dust everywhere. I took my vacuum cleaner and vacuumed up all the dust and afterwards it started working fine. No idea if cleaning the dust made the difference but I've had electronics go bad because of dust in the past so I suspect that it helped. Anyway one more thing that everyone can try when they see this problem in the future!
     
  18. Jun 9, 2013 #118 of 120
    jwood62031

    jwood62031 New Member

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    Feb 12, 2009
    Well, it took 6 months but I lost the coax connection again. I unplugged the box and tried to let it find the signal coming in via coax but just like before it wouldnt allow me to pick coax for the signal source.

    I got out the zenith dtt901 digital tv tuner converter box to see if what worked before would work again..... It worked again. Here's the steps that worked for me:

    unplug tivo
    removed fios set top box line from signal input on back of tivo
    hooked up digital tv tuner converter box to the tivo input
    attached antennae to the converter box and turned tuner box on
    since i had set up the tuner box before it was on a channel with a good signal already
    plugged in the tivo
    waited
    when it came back up I had a black screen and it asked if I could see video, I clicked no and then video started showing again, asked if i could see video --clicked yes and I guess that switched it back to coax.
    removed digital converter box from tivo input and put fios back into the input and I'm back in business.

    Not sure if this will work for anyone else but it's worked for me twice. It would be nice if they would fix the glitch, but until they do I suppose I'll have to keep my converter box handy.
     
  19. Oct 5, 2013 #119 of 120
    photobrian

    photobrian New Member

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    Dec 10, 2012
    It has been a while and I don't know if anyone can chime in on this issue but here goes. I have 2 of these units and whenever the power goes out I have to screw around with them to get them to work. The one in our bedroom is much less fickle about working, the one in our living room is a piece of junk. Basically, aside from all of the various methods of getting these things back to showing cable when it says the infamous "searching for signal" is basically just keep resetting it. I leave everything plugged in now and reset the unit for hours until it just works. My previous method sometimes will work faster maybe less than 5 attempts, but simply restarting it over and over does eventually resolve it. BUT!

    HERE IS MY NEW PROBLEM.

    The unit has been attempting to reboot itself EVERY NIGHT at 2am in attempt I believe to complete a service update. The problem is the thing hangs on the "almost there, a few mintues more" screen and does not complete the restart. It has now run out of guide and when downloading the guide it will succeed however it will say "status:pending restart" of which it again trys to restart at 2am and almost never completes. On occasion, it will complete the reboot but it still will not have the guide and it tells me when I hit the TIVO button that it needs to update the guide. It's a retarded any annoying cycle and I'm about to smash this thing on the ground. As far as I can tell, there is no way to force or install whatever stupid update its trying to do and obviously nobody supports these machines anymore so toshiba has ZERO information on their website about these units. I really do not want to give in and get rid of this thing but it seems like a lost cause at this point. If anyone has any input I would love to hear it.

    Thank you!

    Brian
     
  20. Oct 6, 2013 #120 of 120
    newbs

    newbs New Member

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    Sep 2, 2004
    I think the Series 2 units may be hitting the end of the line. See the thread below:

    http://www.tivocommunity.com/tivo-vb/showthread.php?t=508863
     

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