eazy fix for dead LCD tv's ?

The one thing I've seen common in electrical devices in general is bad capacitors. I have fixed about 25 LCD monitors and TV's combined with the same issue. I just fixed a Samsung that had the following:



Less than $5 later and about 20 minutes of labor and I had a working TV.

There are several things that can cause this and no matter what TV you buy you always run the chance of getting a bad one. You run a greater chance of getting a good one though.

Good luck finding one at a reasonable price. People around here are on crack for what they are asking for broken TV's. You could also end up with one that has a bad panel so don't spend too much money on one.

Lots of TV's have bad caps, not just Samsung. Look on craigslist for one on the cheap and take your chances.

ROFL! Way ahead of you. I already ebay for "broken samsung" and all I see are broken screens.

The Samsung capacitor issue is the least expensive case of read about ($5-$30) so perhaps you could get lucky and find one, however I imagine there are quite a few people who know about how inexpensively and easily this problem can be corrected and are doing the same thing.

Second, there are quite a few with power supply (PS) issues. Depending on how you acquire the PS, you can repair sets with bad PS's for $100-$300. Vizio is notorious for PS problems.

Having said that, it usually doesn't make sense to buy a broken flat panel because new prices have come down so dramatically, while, at the same time, quality and features have improved at a similarly dramatic rate. You can get much more TV and one that will last longer for your dollar, purchasing a new one.

I do kind of the opposite. Over the last few years I've sold my two year old flat screens for 20-30% of what the new ones cost and used the money to finance the latest models. This is a nice way to upgrade if you are realistic about what your old set is worth. For example, a year or so ago I sold my old 720p 42" Vizio for $600 and bought a new Panasonic 1080p for $1200. Sure the Vizio had cost me over three times that a couple years earlier, but it only cost me 600 to upgrade to a much better set. Likewise, I am now doing the same thing with the 42 1080P as I move up a 46" I'll sell the 42" for $400 or so and spend $650 for a brand new 46 inch....$250 for the upgrade.

bad capacitors loose capacitance and can not provide clean DC voltage to rest of the LCD TV modules - they let a lot of high frequency ripple rubbish pass "thru"... so the TV starts malfunctioning...

better caps? Try Rubicon, Nichicon, Panasonic, Sanyo...

the replacement caps in question (as per photo posted above) have to be order as: for switching applications they have to washstand high frequency ripple voltages coming from switched mode power supplies

Rubicon used to manufacture the best sounding audio grade capacitors - Black Gates.... not any more, unfortunately....

Boky

So what kind of symptoms are a result of bad caps on an LCD TV? I hven't worked on much new stuff, but I do know that bad power supply caps on the old CRT TVs causes a hum in the audio and I've fixed a lot of those. Are we talking about power supply caps in this case also?

the photo shows switched mode power supply caps...

in old CRT's the hum was audible because it was at 100Hz - that is ripple frequency coming from conventional power supplies..

with switched mode power supplies, ripple frequency is mush higher - in kHz range. Capacitors used to filter this ripple can now be much smaller in capacitance and they have to be seriously bad for the rail to drop voltage sufficiently enough for problems to start showing... TV may start to switch off intermittently ... and then eventually it can not be turned ON any more...

...without diagram it is impossible to tell which sections will be affected most if particular power supply rail starts to induce ripple and drops in voltage

Boky

My 30 month old Sony 46" KDL-46S2010 died the other day. After spending some frustrating time with Sony Support, I was referred to a "Sony" repair shop who said that the blinking standby light (4 blinks, pause, 4 blinks) indicated either the inverter or the panel. Come to find out, the cheaper inverter "kit" is $500 plus labor and it may not be the problem. I've decided to move on and buy a new TV. I'm open to another Sony (46W5100) but my wife is a little gun shy and is questioning the choice. I'm having severe withdrawal symptoms right now and have to do something quick. I'm trying to get back up to speed and would love to know in advance about any problem tendencies with the major brands. Other than this site and CNET, what else is reliable?

Very interesting way to stay current. You're right in suggesting that the key is to sell for a realistic price while knowing in advance what the new TV is going to cost. Too bad that they don't take in trades and put them in a "Used TV lot" somewhere.

Unfortunately most people try to get way too much for used TV's. Around here people are asking 80% or more of what a TV costs new. Some are asking more than what a new TV costs !!!

i think the software solution is safer and easier, why not try them first, i found two here: appnee.com/udpixel/

Yeah, just look at some of the prices the Ya-Hoos down in the classified ads here on this board are asking. Example