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Looking for repair ideas on a projection TV.

Discussion in 'Electronic Basics' started by Guest, Oct 18, 2003.

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  1. Guest

    Guest Guest

    I have a ProScan 60" rear projection TV sold under the RCA brand name. It
    has been professionally repaired once with a replacement of a "flyback" and
    a "capacitor set". It is 5 years old, and the former repairs were performed
    11 months ago. My current experience with the TV is as follows: The TV will
    work normally for about a week, and then it will stop responding to the
    power button on the front control panel and the remote control. You also do
    not hear any of the telltale signs that power has been activated such as
    components charging up and (I believe) a relay triggering. If you unplug the
    TV for approx. 24 hours and then plug it back in it will operate normally
    for the next 1 to 7 days, then it will begin a similar cycle.
    Intermittently, it will lose audio during its time of "normal" operations
    (which I usually don't notice because I tend to use the TV for video only).
    I shy away from professional repair because the last professional repair
    cost me over $450 and I don't think the TV is worth too much any longer. Any
    suggestions on repair (self or suggested service) are appreciated. I have
    done basic circuit board soldering and de-soldering, but do not have any
    skills in circuit tracing, etc
     
  2. James Sweet

    James Sweet Guest

    It sounds like something relatively simple, if you know what you're doing
    and have a good eye, look for dry or cracked solder joints around the tuner
    ground shield (not sure if Proscan PTV's suffer this but direct views
    certainly do) if it still has the problem then look for the same thing on
    the power supply board. If you don't know what you're doing I highly suggest
    having a pro look at it, if the picture is still good when it works it
    should still have some life left on it, if you poke around without knowledge
    you could easily do a lot more damage.
     
  3. DarkMatter

    DarkMatter Guest

    I would check the power supply for the entire unit. Soft on
    switches and standby start-up circuitry keeps this power supply up,
    and the only thing that changes on start up is the loading. If it
    fails, and then requires a rest before working again, it sounds like
    dried out electrolytics on the supply or perhaps the IR/soft on
    circuitry. Electrolytics are always the first thing I check out on
    older power supplies. I know that 5 years isn't very old, but there
    have been some bad batches made over the years. I recall a
    motherboard recall at one point where the electrolytics had bad paste
    mixes in them.

    Anyway, that is a likely culprit. Another might be enough dust on a
    part that it doesn't give up its heat well, and eventually runs away.

    Be careful of the anode leads on those guns. Projection sets have
    some mean juice there.

    Another alternative is to bypass the soft start altogether, and use
    a hard switch on the unit. Some of the convenience takes a hike, but
    it makes it a working unit again. Must fully power down (unplug) to
    save juice in the interim times though.
     
  4. Baphomet

    Baphomet Guest


    Now I just knew that if only we could all be sufficiently patient, you (Dark
    Matter) would and could rise to the occasion with a coherent answer
    somewhere above the crude monosyllabic responses for which you have become
    infamous. Keep up the good work; there may yet be a place for you in the
    family homo erectus.
     
  5. Sure would be nice if instead of kind works you would use pay pal to
    compensate for the info. Duh
     
  6. DarkMatter

    DarkMatter Guest

    More proof that it is you that is the goddamned troll here. I have
    made hundreds of such posts. Your mother should have flushed your
    shit ass, the moment you exited hers.
     
  7. Such a SWEET Attitude! At least I don't hide behind a false name and
    shrieking faction of what life is all about. After all, I have made a fairly
    good living in repairing these friggin items for over 30 years and do not
    appreciate free loaders such as you taking advantage of me or ANY OTHER
    TECHNICISAN!!!
    Stated many times before is the fact that you get what you pay for in life.
    You for shovelling sludge, others for taking the deligence to learn how to
    actually design and repair the materials others design. Some of us do
    actually give free advice to those who actually appreciate the effort.
    However, in your case, well enuf said!!
     
  8. !
    That would be TECHNICIAN, but you have him nailed. ...and keep
    top-posting. I don't particularly like it, but it drives DimBulb
    *WILD*. ;-)
    Indeed. Some want to steal other's happiness though.
    Hey! Honest people shovel sludge! It's an important profession!
    DOn't confuse DimBulb with anyone doing an honest day's work!
    DimBulb is a cancer on many groups. Treat it as such.
     
  9. Baphomet

    Baphomet Guest

    May I suggest some remedial biology?
     
  10. DarkMatter

    DarkMatter Guest

    I think you are a top posting usenet retard, boy.

    I was the one that gave the guy the assistance, dipshit.

    BLAPOMET or whatever the ****'s name is is the one that came in here
    chomping at his troll bit, jumping on me. YOU need to figure out what
    the hell you are saying and who you are saying it to. RIGHT AFTER you
    read up on the proper way to post to a usenet news group.

    By the way, dipshit, Usenet has been an anonymous realm for
    decades.
    Nicknames are perfectly acceptable so get a friggin' clue, boy.

    Also, it is "TECHNICIAN", you dumbass.

    And "DILIGENCE"

    Some of us actually learned a few things as we grew up.
     
  11. Baphomet

    Baphomet Guest

    caught you lying again Dark. I came to praise your post, not bury it.
    But apparently not you Dark; you haven't grown up yet. Dark Matter (as
    usenet poster), synonymous with home of the linguistically, emotionally and
    intellectually challenged.
     
  12. Absolutely Correct DM!! Case Closed! Just whoever the heck you are !!!!!!
     
  13. DarkMatter

    DarkMatter Guest

    What part of "That makes you a piece of shit" do you not understand,
    boy?
     
  14. Guest

    Also note that it's considered poor Usenet form to nitpick spelling
    errors. Personally, flamewars and trolling are in poor taste.
     
  15. JW

    JW Guest

    [.]
    You're a cowardly little blowhard, a Chihuahua with a tiny little bark,
    yipping incessantly and soiling himself from nervous incontinence. Your
    daddy should have pulled out and shot you against the side of the dumpster
    your mommy was leaning up against when you were conceived. The sight of
    your old man's jizz running down the side of a trash can onto the filthy
    floor of a back alley has a kind of poetry about it, unlike the shambling
    waste of oxygen-stealing flotsam that you've grown up to be, you complete
    and utter loser.

    In short, I hope and pray a lightning bolt of a size to make Nikola Tesla
    drool, turns your doublewide into something resembling a microwaved
    Faberge egg, you moronic, slack-jawed cretin.

    Please FOAD at your earliest convenience.
     
  16. Baphomet

    Baphomet Guest

     
  17. DarkMatter

    DarkMatter Guest

    Not "form", dingledorf, etiquette.
     
  18. DarkMatter

    DarkMatter Guest

    I've got nine inches of "tiny bark" for your lame ass, little girl.
     
  19. DarkMatter

    DarkMatter Guest

    You're an idiot with a latino dog fixation.
    Sorry, wrong number... click.
    Wow, my simple **** you remarks really bring out the slime in
    usenet. You are that slime.
    No trailer here, retard boy.

    The jaw? Well, it's in a big smile right now... not slack at all.
    You lose again.
    Hahahah... Please **** off and die right now, slimebucket.
     
  20. JW

    JW Guest

    [DarkSplatter in his highly excitable Chihuahua-like state replies two
    times. HAW HAW!!]
    Watch the language, pootie pie. I know you have trouble with English, but
    the repeated beatings you've been begging for (and receiving, quite
    enthusiastically) are a good motivational tool for misanthropic
    microencephalic Future Organ Donors of America such as yourself. But,
    only if you pay attention to the lessons pounded into you by your moral
    and intellectual superiors. That's damn near everyone who has access to a
    computer keyboard, making your vetting process simple enough for even you
    to complete with a low rate of false positives.
     
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