Clemsonite
Full Member
Put it on craigslist for $75 bucks. Someone will offer $50 and then you can buy more metal detecting stuff!
any electriction/hobbyists out there help??
- Thread starter NHdave
- Start date
achaios
Forum Supporter
The only reason I have an HDTV (and it's only 22") is because my non-HDTV started smoking. I simply don't watch enough TV to make it worthwhile. When I do watch TV, it's educational programs, or old TV shows and movies (I have a pretty large DVD collection).
I had heard about the short lifetime of plasma screens, but I didn't know if it was a certain brand, or plasmas in general. In any case, if you get enjoyment out of fixing cast-offs, go for it. Otherwise, I'm inclined to agree with the suggestions to put it on eBay or Craig's List. Just beware of someone using PayPal, and then disputing when *he* finds it not worth his time and effort to fix it.
-- Tom
I had heard about the short lifetime of plasma screens, but I didn't know if it was a certain brand, or plasmas in general. In any case, if you get enjoyment out of fixing cast-offs, go for it. Otherwise, I'm inclined to agree with the suggestions to put it on eBay or Craig's List. Just beware of someone using PayPal, and then disputing when *he* finds it not worth his time and effort to fix it.
-- Tom
tjr35
Elite Member
not sure if its been asked yet, but are you sure its out of warranty?
NHdave
New Member
not to be redundant... but, this thread is not meant to be a discussion on tvs, ie: which are better or worse, why have a tv at all, etc..I have an LCD that is in my living room, that is the TV I bought 5 years ago, still use it, still works like new...
this plasma was free, and I am not interested in putting on craigslist unless I cannot fix it for a reasonable cost (under 100$ and that would only be if I got a whole new board)... I am asking for advice on which capacitors to replace or a way to troubleshoot to solve which caps to replace.. I have seen many youtube vids of people replacing specific caps, but couldn't find one that has the same board as this plasma.
Cap'n Morgan - If I put up a picture will that help at all?
Tom - I think I am one of the few people around that has *knock on wood* not yet been burned by ebay lol, both as buyer and seller so far......
Buckeye - I agree with you about the LCDs being better, and the LED is too new a technology at this point IMO, it might be great, but we'll see after they have been out for a few years, and then the price goes down etc.. it is obvious that the lcd won the battle against plasma, as you can now find huge plasmas for dirt cheap (though not as cheap as this broken one I now have apart in my spare bedroom lol)
this plasma was free, and I am not interested in putting on craigslist unless I cannot fix it for a reasonable cost (under 100$ and that would only be if I got a whole new board)... I am asking for advice on which capacitors to replace or a way to troubleshoot to solve which caps to replace.. I have seen many youtube vids of people replacing specific caps, but couldn't find one that has the same board as this plasma.
Cap'n Morgan - If I put up a picture will that help at all?
Tom - I think I am one of the few people around that has *knock on wood* not yet been burned by ebay lol, both as buyer and seller so far......
Buckeye - I agree with you about the LCDs being better, and the LED is too new a technology at this point IMO, it might be great, but we'll see after they have been out for a few years, and then the price goes down etc.. it is obvious that the lcd won the battle against plasma, as you can now find huge plasmas for dirt cheap (though not as cheap as this broken one I now have apart in my spare bedroom lol)
FL-Hunter
Forum Supporter
LED's have been out for well over 40 years, your just now seeing them in TV/Monitors. You do not need to worry about them not being around enough. By far, hands down, LED's are much better than LCD. LCD has a limited life expectancy to them of 5 to 7 years. Once that Compact Fluorescent bulb in them goes out, so does your picture. There are two lamps in each LCD screen while some have one. LED's have a much longer life and if one burns out, your not going to see it in a TV of any significant size. You would need to loose over 100 of them before you even noticed anything and even then you may not notice. Fear not of the LED, but do fear the Reaper!
Voriax
Forum Supporter
NHDave, check this: http://www.fixya.com/support/t5002841-turns_off_after_about_30_seconds_starts
If this isn't your model..well..the advice is sound imho and this site has a lot of similar advice, just search any for your model.
Voriax
If this isn't your model..well..the advice is sound imho and this site has a lot of similar advice, just search any for your model.
Voriax
Vito
Elite Member
If that would be that easy, what are the technicians good for?? Would be also a budget fix.
The error can be everywhere. You have to compare the voltages at the testing points, and and to compare the wave forms of the signals with a oscilloscope. Man, and be very careful if it comes to the power source. Electric power is killing.
To me it sounds you need a new switching power supply, but you have to test this.
And again: BE CAREFUL ! ! !
The error can be everywhere. You have to compare the voltages at the testing points, and and to compare the wave forms of the signals with a oscilloscope. Man, and be very careful if it comes to the power source. Electric power is killing.
To me it sounds you need a new switching power supply, but you have to test this.
And again: BE CAREFUL ! ! !
IntoIt
Elite Member
What I did was pull out the board, If it helps make a diagram or take a pic before removing the wires. Once out using magnification glasses look on the solder side for any loose or damaged solder connections, I wiggle the capacitors while looking very close. You cannot test the caps in circuit so you have to desolder them, I test the biggest first or any that have a bulge or seepage near the pins, there is a glue they use to glue in the caps so dont confuse that for seepage.
Good luck.
Good luck.
Rudy
Admin
Be very careful! If it is a switching power supply, you will also have some large electrolytic capacitors on the mains side of the board and the design may be such that they are not discharged on power off. If they are charged up and you happen to put a finger or knuckle across those capacitor terminals, you will get a nasty electrical bite.
blklion
Senior Member
Plasma TV's generate a considerable amount of heat and I'd guess this is a heat issue more than anything else.
Get a spray can of non-lubricating contact cleaner, turn the TV on until it starts it's on/off cycle thing then spritz various board areas and components to see if it doesn't revert back to the 3-5 minute warm up.
Get a spray can of non-lubricating contact cleaner, turn the TV on until it starts it's on/off cycle thing then spritz various board areas and components to see if it doesn't revert back to the 3-5 minute warm up.
NHdave
New Member
again.. me being naive and sketched about getting zapped... spraying this while the unit is powered up won't cause an e- arc to travel up said spray into can and through my hand right? (dumb question??)
I just ordered the caps.
I just ordered the caps.
blklion
Senior Member
Contact cleaner is nonflammable and non-conductive. You can use CO2 also. All you want to do is cool off the board in spots (if it is a crack) and cool off the discrete components (chips and transistors) one by one until you hit the faulty component.
FL-Hunter
Forum Supporter
Just an FYI: It does not have to be just one faulty component, you could have a resistor, capacitor or transistor that went bad sending high voltage to another circuit causing a whole series of components to go bad. A repair like this should be be handled by someone who is familiar with this kind of work. Many times when repairs like this are needed, a service manual from the manufacture is required in order to properly do the repair and in many cases, manual tuning up of specific circuits is required on variable devices in order for the entire circuit to work as per manufacture stated specifications. I myself am more than capable of component level troubleshooting and repair of certain types of devices, however even I do not have the knowledge to repair certain items because that documentation and or specific electronic test/tuning equipment is not available to me.
I guess what I am saying, is if you are not a TV repair person, or don't have specific knowledge in this, you should not be attempting this repair.
If something isn't done right, your TV still plugs into the 110V of your home and the last thing you want is for you to possibly solder something too close to something else, it cause an arc in the high voltage area one day when your not home and you come home to a house that burnt down to the ground due to trying to save a $500 TV or something like that.
I'm not trying to discourage you, but I would not be doing what you are doing as I have no TV high voltage experience and that's what you are working with here.
If it were me, I would sell the TV for parts on Craigslist/Ebay, take the $100 or $150 you get, and go buy a brand new latest and greatest TV and leave your old TV to someone who knows what they are doing and can repair it properly.
That's just my 2 Cents on this.
NHdave
New Member
advice noted, thanks.
I guess I obviously don't have the experience to be desoldering components on a tele like this, if it were a guitar needing new pickups I am all over it lol..
I don't feel bad that I am out 4$ in capacitors, as this sparked a new interest in actually learning about circuitry..
what do you guys think about just buying a new main board (I am almost certain the problem is SOMEWHERE in here.. since when it is "on" the picture and audio as well as all connections all work perfectly)
I found one for 100$... is this a gamble? It would basically just be 7 screws and plugging all the wiring harnesses back in.. (obviously no "risk" of fire/shock etc.. in doing this) and as this is the "first line" with power going through it.. there couldn't be a short earlier to short out anything on this board, correct?
thoughts???
I guess I obviously don't have the experience to be desoldering components on a tele like this, if it were a guitar needing new pickups I am all over it lol..
I don't feel bad that I am out 4$ in capacitors, as this sparked a new interest in actually learning about circuitry..
what do you guys think about just buying a new main board (I am almost certain the problem is SOMEWHERE in here.. since when it is "on" the picture and audio as well as all connections all work perfectly)
I found one for 100$... is this a gamble? It would basically just be 7 screws and plugging all the wiring harnesses back in.. (obviously no "risk" of fire/shock etc.. in doing this) and as this is the "first line" with power going through it.. there couldn't be a short earlier to short out anything on this board, correct?
thoughts???
SkiWhiz
Elite Member
If you can spare $100.00 why not take a chance. I never worked on tv's much but besides being a dairy farmer all my life I have been a satellite dealer since 1985 and repaired many receivers, most often when a satellite receiver had a problem it was the power supply, especially in them older Houston Tracker and Echostar models.
FL-Hunter
Forum Supporter
Replacing a board is always easier than trying to replace a single or multiple component, but like anything else, it's a gamble, because you really don't have a clue where the problem is and you may hit the nail on the head with a new board, or you may be right back to where you started from, only now you threw out $100. If your a gambler, go for it, if your not, use this situation as an opportunity to upgrade your TV and get whatever you can for the old TV for parts or someone else to repair. Believe me, someone else will make good use of it. There are people out there who will buy broken anything because they know how to fix it and to them, they are getting a steal, to us, we are getting money for a TV we normally would have just thrown out. It's a win win situation for both parties.
That's just my thoughts on it all. I had an old 20" TV that I bought back in 1982. It was a nice Sylvania SuperSet II stereo TV. in 1995 it had a problem and was making a sparking sound (not actually sparking) so I took it in to be fixed. It cost me $150 and the guy knew what it was before he even opened it up. It was 2 resistors and one transistor in the power supply board. He said they allways blow out, he was surprised mine lasted this long. He advised me to replace the TV because you could by a new one for $200. Well I could not get a Stereo TV Flat Tube for that price, I would have still had to spend over $500 so I opted to fix it. It lasted till around 2004 of which it died again. This time I knew what the components were and did the repair myself, it cost me $ .98 and worked for 4 more years when it happened again. At that point I donated to the landfill and my Dad had an extra old TV he wasn't using so that's the way I went.
Now I'm looking at a new LED TV. Sometimes it's not worth dealing with the issues and still having an old outdated piece of Electronics gear.
NHdave
New Member
yeah, I hear what you are saying, but I really don't "need" to upgrade, my 32" does just fine but we have been talkinf about getting a bigger one for living room so we can use the 32 and watch movies in bedroom..
and to answer your question.. I am a bit of a gambler, (hah, I just won 40$ on a 3$ scratch ticket prior to checking back on here) lucky day!
would everyone here *agree* that the problem with this is almost certainly, most likely, probable, potentially, maybe, or less than 50% that replacing the main board will solve this problem??
IE: if I am making a bet what are the odds
I understand that every system is different, and many variables are at play, ETC.. BUT I mean from the standpoint of anyone with experience with this type of problem, obviously some problems are much more common than others.. Ie: blown capacitors are more common than others.. thoughts?
and to answer your question.. I am a bit of a gambler, (hah, I just won 40$ on a 3$ scratch ticket prior to checking back on here) lucky day!
would everyone here *agree* that the problem with this is almost certainly, most likely, probable, potentially, maybe, or less than 50% that replacing the main board will solve this problem??
IE: if I am making a bet what are the odds
I understand that every system is different, and many variables are at play, ETC.. BUT I mean from the standpoint of anyone with experience with this type of problem, obviously some problems are much more common than others.. Ie: blown capacitors are more common than others.. thoughts?
FL-Hunter
Forum Supporter
yeah, I hear what you are saying, but I really don't "need" to upgrade, my 32" does just fine but we have been talkinf about getting a bigger one for living room so we can use the 32 and watch movies in bedroom..
and to answer your question.. I am a bit of a gambler, (hah, I just won 40$ on a 3$ scratch ticket prior to checking back on here) lucky day!
would everyone here *agree* that the problem with this is almost certainly, most likely, probable, potentially, maybe, or less than 50% that replacing the main board will solve this problem??
IE: if I am making a bet what are the odds
I understand that every system is different, and many variables are at play, ETC.. BUT I mean from the standpoint of anyone with experience with this type of problem, obviously some problems are much more common than others.. Ie: blown capacitors are more common than others.. thoughts?
It's common electronics, the problem can be anywhere, although power supply problems are very common problems with everything these days including computers. If you have only 2 boards, you have a 50/50 chance, if you have 4 boards you have a 25% chance and that's about all I can offer you.
NHdave
New Member
ok quick update, not sure if this narrows it down...
I just plugged it in with the back of and had a fan blowing onto the back... the tv stays on..? so wonder what this means
I just plugged it in with the back of and had a fan blowing onto the back... the tv stays on..? so wonder what this means
blklion
Senior Member
It means exactly what I told you to look for/try. You have a component overheating and shutting down. It would be in the power on/off circuit and it probably pulls in a relay to power the TV up.
