Most of the people thinks, and trusts, that a TV is working only with capacitors. Not such. Don't you see any other components on board, other than capacitors?
With your TV, a shut-down occurs after it has switched ON; means, there is something shorted component/s on the other board, than the power board. Actually, the power board trends to start, but a short circuit to any other board prevents it to stay ON, and this is a protection. The protection circuit built in; detects this short circuit, and shuts down the power supply, and thus preventing further damages.
It will be best for you to contact any service technician in this case, because, it sounds that you're not sound in electronics. OK.
google.com/+GopakumarGopalan
Dear GOP, you have no idea of my background in electronics or the type of work that I have done in the last 25+ years. I hoped to get a schematic or some sound advice, not an insult.
Check the site. Being a King in Electronics, you can follow.
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SOURCE: how to disassemble polaroid TLA-01911C lcd tv
1) Take the foot off the stand and with a long philips screwdriver remove the single screw that is at the top of the leg (inside leg). Then with the tv facing down lift straight up on the leg.
2) remove the two screws comming from the back of the tv along the bottom edge.
3) With the tv face down on a soft surface ( towel, bedspread, ect).
4) Be carefull with this step it this tv gave me some difficulty and I am experianced with this proceedure. Too much pressure or forcing it too hard will break your case. The back of the tv has a lip which inserts into the face.The face has tabs that lock into slots in the lip of the back. Carefully pry between the face and back pannel (I used my thumbnail and a 1" plastic putty knife.) and slide along the seam until the locking tabs pop loose. Continue sliding your instrument along the seam until all tabs are loose.
5) The back of the tv lifts off of the face leaving all electronics in the face of the tv.
That gets you into the tv. what you do from there is up to you, Good luck;)
SOURCE: Magnavox 19MF337B/27 LCD TV problems
The bad capacitors in this set are usually NOT on the power supply--they are on the other (logic) board. You will find several bulging capacitors there. Replace em all....
SOURCE: Failed Repair Job. A friend of mine called a
replacing the 10V caps with 25V caps is perfectly fine. In fact, if it was manufactured like that, those caps may not have blown.
Replacing a 680uF with a 1000uF could be problematic depending on it's function.
680uF is pretty specific when 500uF and 1000uF are much more common and therefore cheaper - one would think that the engineers would have tried using those in the design rather than a 680uF - makes me think the value of the cap is important to the frequency of the circuit it's in.
Other concerns might be whether he got any of them in backwards or not.
That's a rookie mistake, but still an easy enough one to make (for a rookie).
Also, with that many swollen caps, I wonder if there were any that leaked out the bottom before swelling at the top (IE - if some caps were missed in the replacement procedure)
Also, with that large a number of caps gone, other components may have been compromised or blown.
I'd be testing the transistors around those caps (most likely punched through rather than open), looking for fusible links (surface mount fuses, 0 OHM resistors) that may have opened up etc.
The initial attack on the problem was basically correct, and in many cases probably would have fixed it (if say the 680uF cap was functioning as a ripple filter).
But when that didn't fix it, a deeper analysis should have been done to complete the repair (including locating a 680uF cap).
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