My wife picked up a TV

I think the TV shop just made a low ball offer, if it is accepted he can stock it.

Just correcting the LED label from the previous post.

The first LCD TVs were simply called LCD as opposed to the other flat screen tech at the time: plasma.

It had 14 CCFL tubes running across the back panel of the TV. I also have the inverter PCB for sale, but at the end of a month I will probably dispose of it.

No backlight LEDs to fail. Mikek

amdx:

A BIG contributor to backlight failure is the setting for it! Most people do not go into the menus for these flat panels, and just watch it in default settings - typically 'Vivid' or Dynamic mode.

I calibrated my LED set last year, starting with the backlight lowered to halfway. Final setting was 8/20, using Samsung's scale. It is still plenty bright for viewing where the TV is in my house, looks awesome at night, and neither myself nor anyone else watching it has complained of eye fatigue.

Moral of the story: Unless the TV is intended for use outdoors on sunny days, or on the sun deck of a cruise ship(!), there is no reason whatsoever to leave that backlight at its maximum setting. This is akin to leaving the Contrast setting on an old tube TV cranked up all the way. Which is why so many of those hit the dump prematurely.

amdx:

A BIG contributor to backlight failure is the setting for it! Most people do not go into the menus for these flat panels, and just watch it in default settings - typically 'Vivid' or Dynamic mode.

I calibrated my LED set last year, starting with the backlight lowered to halfway. Final setting was 8/20, using Samsung's scale. It is still plenty bright for viewing where the TV is in my house, looks awesome at night, and neither myself nor anyone else watching it has complained of eye fatigue.

Moral of the story: Unless the TV is intended for use outdoors on sunny days, or on the sun deck of a cruise ship(!), there is no reason whatsoever to leave that backlight at its maximum setting. This is akin to leaving the Contrast setting on an old tube TV cranked up all the way. Which is why so many of those hit the dump prematurely.

Nobody who was offended by the statement would've voted for her in a million years anyway, and she was too kind, regardless.

The whole world is tired of bending over backwards to appease glomping redneck Americans who've done nothing but insult, bully, and threaten anyone who isn't them for decades.

why??

NT

The moral is correct will be lost on just about everyone. The TV's default is 100% back light right out of the box and will revert back to 100% if yo u sneeze loudly anywhere near them. When I first started doing LED array re pairs I'd demo the proper way to adjust back light, show them where I set i t and why, and I'd still see some come back a year later with LED failures, and the back light setting defaulted to 100% once again. Try this: put yo ur back light to 50% in custom, then move to vivid, sports, theater etc. R eturn to custom and you'll find all your settings where you left them, *exc ept* the back light which is now magically defaulted to 100%. It seems the engineers think people like the light pollution that bleeds through dark s cenes and destroys the black level..

It's even worse if the customer chooses "demo" instead of "home" when they first perform the out-of-box procedure. The "demo" mode cranks the back li ght another 20% over the already too high setting. If someone buys a demo off the wall at Walmart, the TV has maybe weeks or months left to live.

So, every LED repair I do involves modifying the drive to the array, usuall y I shoot for 40% reduction in wattage. Most mods involve changing the sou rce resistors on the drive mosfets to raise the feedback dc to the controll er IC. Some top of the spectrum brilliance is lost but the black levels imp rove dramatically. It's a trade off that also virtually guarantees no retu rns to me.

Only one person came back and questioned the brightness of the TV (a Samsun g)that I repaired. I explained what I did and why, and expressed surprise t hat he picked up on the picture and he was the first to do so. He told me he had two of the exact same model in adjoining rooms, and saw the A-B ever y day. I told him I could certainly undo the mod and explained the trade of f in life, and he said he'd keep it that way.

redneck Americans who've done nothing but insult, bully, and threaten anyone who isn't them for decades. "

Where were the cry ins when Obama got elected ?

Where were the blocked highways when Obama got elected ?

Who was kidnapped and forced to drink toilet water when Obama got elected ?

Who disrupted public speaking engagements when Obama got elected ?

Don't try to sell that shit to a grown Man. Liberals might buy it. You know why most conservatives are older ? Because they learn in life that liberalism does not work.

snipped-for-privacy@gmail.com wrote: "Try this: put your back light to 50% in custom, then move to vivid, sports, theater etc. Return to custom and you'll find all your settings where you left them, *except* the back light which is now magically defaulted to 100%"

ERRRR! Not on my 2015 Samsung smart LED! When I cycle through all those modes back to custom, or Movie as I use(least background processing of picture), the backlight is right where I left it.

Guess it depends on year, model, and even size of Samsung.

So that customer in your last example agreed not to go back to torch mode? Good for him! There is hope afterall.

I think most conservatives looked at Obama, looked at Romney, shrugged, and figured they'd be better off anyway.

Then called him a Kenyan Muslim for 8 years.

The reason people were srs upset over Trump in a way that was different than Obama is Trump made it a point of his campaign that his presidency would be dedicated to exacting mass revenge on the most vulnerable people in society on behalf of the (imagined) slights his base has "suffered" at their hands.

Should they not have taken him seriously? When someone says directly "I am going to f*ck you" I guess they should just relax and see how things go.

I'm sure conservatives thought Obama was going to f*ck them, too. Problem is that the definition conservatives have of being "f***ed" is if the government doesn't kiss their ass and do exactly what they want

100% of the time, particularly on matters of religion, taxes, and not expelling every non-white person in the country.

I think it comes mostly from feeling bitter about girls not liking them very much when they were younger.

Because you found her story inspiring. Mikek

I didn't especially. It's good she's thinking, but that's all. It certainly doesn't warrant any generosity. And I'm sure she has quite enough of her own. When I hand money out it's where it's going to do something truly useful.

NT

True story: I was sitting at a restaurant with a friend who has a Sony LCD

50" that I "calibrated" (eyeballed) for him. There were several TVs runnin g and the one near us had a baseball game on. The TV was a Sharp Aquos 60" that had a picture so cartoonishly garish that it was truly offensive to t he eye. Not only were the LEDs (apparently) cranked all the way, it also m ust have had every "enhancement" in the picture menu checked off.

So my friend, impressed by what he was watching on the Sharp(!), asked if I could get his Sony to look like this Sharp. I told him in my best deadpan that even if I screwed with every adjustment, I couldn't possibly get the Sony to look that bad.

His look of complete confusion led me to ask him if he ever saw grass that color (a bright fluorescent green). I asked him if he ever saw a black shi rt have a blue underglow to it. I explained that his Sony was adjusted to give as close a representation as a view through a window, not change the c ontent. He finally saw what I was talking about. I didn't bother explaini ng the artificial black level "enhancements" this TV had, as that's best do ne by an A-B demo.

But go to any store that has a hundred TVs running. The one cranked to stu pidity is the one most people will think has the best picture. Kind of lik e the old "sizzle and boom" EQ settings people like to adjust their stereos for.

ohg.. wrote: "But go to any store that has a hundred TVs running. The one cranked to stupidity is the one most people will think has the best picture. Kind of like the old "sizzle and boom" EQ settings people like to adjust their stereos for. "

LOL!

I wonder if this is the case in stores in countries outside the U.S. I know it was in one electronic emporium in the Philippines. I eyeballed a 4K OLED to sane levels as you did, but within

5 minutes of turning my back the sales staff had the set back in torch mode!

No WONDER consumers have no concept of accuracy when it comes to a TV picture, and manufacturers are largely to blame.

Hey, thanks for that, I sold the 3 PCBs I removed. After costs I netted $100. Mikek

And you helped out three other people get their TVs working. Good karma there.

After I sold the first two pcb's I decided to list the third pcb. It sold, but, it happened, the third pcb I sold is being returned. Customer (a TV repair shop) says 'did not fix backlight problem' The board worked when I removed it. I suspect poor trouble shooting or I'm getting back a bad pcb. I did mark my pcb with my intials, so I'll know if I get the same pcb back. I posted a picture of my markings to ABSE and to my dropbox account, this morning I also made a Ebay listing showing the picture of my markings on the pcb. I used a very high price so no one will bid. I hope I get back a different pcb. Today is the last day the seller is supposed to ship it. No notice of shipping, I provided notice to return on 6-28-17, he has had 6 business days to return. Mikek

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uccess on youtube and always assume their TV has the same issue. What happ ens is they buy the wrong board, or the TV doesn't need a board at all if t he display itself is bad or has an open LED in the display or a wiring issu e inside.

you don't get a return request on one or both of those boards. My dad alw ays told me not to count my chickens before they're hatched.

A lot of TV "repair" facilities are guys we call "trunk monkeys"; repair sh ops operated out of the back of a car. These guys have no training and no state license, but just swap boards around hoping to run into a repair.

Yes, it was indeed poor troubleshooting on the buyer's end and now it's agg ravation for you. Samsung LED failures are epidemic, and the repair shop s hould have known this. Most shops built their own LED testing tools years ago, but now anyone can buy a tester for LED strips that will light even gi ve a voltage readout of the run voltage of any given strip at the tester's preset current limit, and do so without disassembling the display.

It's possible that the buyer made the return request in the hopes you would credit back the money and tell them to keep the board. It wouldn't surpri se me if you don't hear from them again.

Too bad you also didn't remove the LED strips from the carcass before scrap ping it. These bring good money and are in high demand.

This was a CFL unit, I didn't want to mess with those. Ebay requested the purchaser to return the item by 7-06-17, it didn't happen. You may be right, in saying he wanted me to credit back the money and tell them to keep the board. I didn't :-) I think it is common for shops to replace pcb's on flat screens. I worked at a electronics shop 25+ yrs ago repairing VCRs. It was all component level on the VCR's but I did note the TV tech replaced a lot of boards. I sometimes helped him on tough dogs, and he was always impressed that I'd fix a TV at component level, he had spent hours on, that may tell you something about that TV tech.

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success on youtube and always assume their TV has the same issue. What ha ppens is they buy the wrong board, or the TV doesn't need a board at all if the display itself is bad or has an open LED in the display or a wiring is sue inside.

if you don't get a return request on one or both of those boards. My dad a lways told me not to count my chickens before they're hatched.

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r shops operated out of the back of a car. These guys have no training and no state license, but just swap boards around hoping to run into a repair.

aggravation for you. Samsung LED failures are epidemic, and the repair sh op should have known this. Most shops built their own LED testing tools ye ars ago, but now anyone can buy a tester for LED strips that will light eve n give a voltage readout of the run voltage of any given strip at the teste r's preset current limit, and do so without disassembling the display.

ould credit back the money and tell them to keep the board. It wouldn't su rprise me if you don't hear from them again.

crapping it. These bring good money and are in high demand.

Ah.. I used to save CCFL tubes and I still have an assortment. Too much tr ouble to ship safely although many try.

In any case, the TV shop still screwed up. CCFL tubes are easier to check than LEDs. Put a scope probe *in proximity* to the secondary of each CCFL output transformer and watch the waveform. It's important to put the probe in the exact same spot for each as the waveform's amplitude changes signif icantly with a small physical placement of the probe. A waveform that is mu ch higher and distorted than the rest indicate an open or very lazy tube, o r a corroded connection on the tube cap. In any case, playing musical chai rs with the inverter transformers to see if the abnormal waveform stays wit h the suspected tube or follows the transformer quickly identifies this as either a tube problem or inverter problem.

If you want to make money and do it quickly, you can't be changing boards u nless they're particularly cheap. Component level is all we ever did but t he problem these days is that even companies like Samsung are not providing full schematics. This means I spend time looking at datasheets and using the "representative" circuit as a guideline for doing component level repai r. Fortunately, parts that manufacturers don't sell us can usually be sour ced from China. I never order one, I always order 10.