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Samsung TV on the blink , literally

silverdale

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#1
I have a Samsung TV LE32R87BDX it's been a cracking tv for the bedroom up till recent. Whats happening now is, the main power light would be lit but as soon as you hit the remote to power it up it would turn itself off, no lights.


I looked to see if there were any bad caps on the power board then someone local had the identical power board advertised for a tenner so I gave that a shot.

Now the main power light comes on, blinks a couple of times, powers off then back on and does the same.

Has anyone any idea's before I scrap it ?. If I can fix it for say £20-£30 it's far better than forking out a £150 for a new one and I dont mind trying.
 

silverdale

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#2
a dug a bit deeper into it, I read where some guy warmed up the tv with a hairdryer so I gave it a go and it powered up but ...
no picture. Well it flashed a picture up for a 2 seconds then disappeared. Then once the tv cooled down it reverted back to the standby light coming on blinking a few times then switching off again.

The only reason I am persuing it is, the parts are dirt cheap. A inverter is only £4 but it's figuring out which has blown.
Anyone had similar ?
 

alimac

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#3
had a nightmare time with couple LG tvs kept blowing boards etc
still under guarantee engineers repairing adviced when one board blows can take out others no idea right or wrong info but gave up in the end
dumped LG now with samsung all good so far
hope you get it mate
 

silverdale

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#4
I'm going to risk it and take the gamble. I know its not the power board so I've ordered an AV board and inverter board £20 the pair. If that don't work then its for the scraper and just re-ad it spares/repairs and get my money back.
 
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#5
Reading that you sprung abit more life into it, by heat from the hair dryer. I would start with the main board especially if the board holds bga chips, which would cause the TV not to boot, if the solder balls have cracked.

Although without a multi meter to test voltage to pin point your problem area, your guessing. It could, however generally be 1 of 4 things from now. It's either AV/Main board/Inverter board/T-con or back lights.

Golden rule: If the screen isn't cracked it's fixable!

Good luck mate.
 

silverdale

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#6
thanks, I did try the old xbox reballing trick with some low residue flux and a heat gun thinking it's a dry joint somewhere but its the same, hopefully the av board or inverter might fix it.

I know alot of people would just throw it and get new because it's easier and cheaper than sending it to a repair shop but if I can get parts cheap enough and another few years out of it then so be it and there's also the feel good factor knowing you sussed and fixed it.
The parts should be here tomorrow so I will either be in luck or be in the car heading for the tip and Currys :)

Excellent Golden rule: If the screen isn't cracked it's fixable!
like that , :)
 

silverdale

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#7
The av board arrived today and the tv's cycling on/off ok which it wasn"t doing before but, still no picture. I did a bit of googling and after pressing the menu button I tried shining a torch into the screen and I can just about see the faded writing in the back ground which by all accounts its pointing towards a faulty backlight inverter.
The parts were ordered separately so hopefully the inverter will be here tomorrow.
I'm no tv repair guy that's for sure but there's nothing hard about swapping parts out, the hardest bit finding out which bits are knackered.
 

silverdale

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#8
Well it might be dead now, I had some spare time today so I thought I'll remove the inverter board for the new one arriving tomorrow.
I unscrewed the inverter board cover and the inverter and gently lifted it out. It was then I noticed all the tiny bulbs in their slots in the TV but one is damaged, smashed along the top and their all loosish. I honestly couldn't have done it any more careful so God only knows how your meant to get it out.

I think its f**ked to say the least. If their broke is that it ?
 
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#9
Well it might be dead now, I had some spare time today so I thought I'll remove the inverter board for the new one arriving tomorrow.
I unscrewed the inverter board cover and the inverter and gently lifted it out. It was then I noticed all the tiny bulbs in their slots in the TV but one is damaged, smashed along the top and their all loosish. I honestly couldn't have done it any more careful so God only knows how your meant to get it out.

I think its f**ked to say the least. If their broke is that it ?
Screens still not not f***** so there's hope lol

Put the inverter in when it comes and see whether the backlights stay on. Your luck may still be in. Had one the other day with 2 bulbs out and TV worked after I fixed the initial fault.

Good luck mate.
 

silverdale

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#10
will do, were are these bulbs connected to ? and are they cheap and a pain to replace if needed be ?. I'm heading the tip tomorrow and I will f**kin launch it
 

chookey

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#11
I'm no tv repair guy that's for sure but there's nothing hard about swapping parts out
Sorry @silverdale but I couldn't resist it. For probably around another tenner more your local repair shop would have fixed it by now. Prices are generally quoted based on screen size nowadays.
I would say the new breed of tv "engineers" probably do more board swapping than actual component level repairs. Tv's are far more complicated nowadays and the boards more densely populated, far more like computers with microscopic components. With ever impatient customers a board swap is usually preferable and the component level repair can be done later using the bench power supply.

It's a pity that those of us past and present in the trade have a reputation of overcharging. Youtube hasn't helped really where all the faults seem to be swollen caps. We loved those jobs as we made quick easy money, made up for the ones that you spent hours on, sometimes days and your profit was next to zero, but you had earned a customer. More often than not the repaired set also goes through a period of soak testing. Depending on the nature of the fault this could be a few hours or a few days, all in the price.

I think in my day that I had to wait 4 years after gaining parts 1+2 C&G before I could apply for part 3. During this time and after we seen the advent of the vcr, satellite, dvd recorders, home theatre, HD , 4k and loads of other stuff inbetween that I would remember if I wasn't on my 3rd generous glass of whisky. The learning never stops. There can't be too many other occupations that have seen so many changes in that timespan.

"A life beset with problems", I think @trevortron may remember where that phrase is from. By the way silverdale, my ramblings here aren't a dig at you mate.
 
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#12
The bulbs connect up in parallel to a pcb board which has positive and negative voltage. Basically the bulbs are individually laid out on strips, with two points of contact, plus(+) & minus(-), that then go to the inverter, which steps down the required voltage needed from the power supply board.

If one is out/dead or whatever and the TV is still turning on, ideally you would replace, as you may notice a little dark spot, I didn't with the one I have now, maybe because my preferred TV back light settings are set low and the two lights that was out wasn't right next each other, but if you want to go down that route of soldering it off and putting a new one on even if it does boot, just remember, this is your 1st one and for me that would be me really pushing my luck, normally by now, at what stage you've got to, mine would of already been in the bin, cause I would of f***** it definitely by now. Count your lucky charms mate, if the inverter does the trick, put it back together.

If still, you will need to source a backlight bulb for your TV model, but might as well get a strip, may find it easier. Wouldn't pay more then £20, at that point though mate, money wise, you would of been well over for that TV. Gets a strip and it still doesn't work... :shakeshead::shakeshead::shakeshead:

Learned something though :banana:
 

silverdale

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#13
Yeah I've replaced lots of blown caps for pennies.
I recently got charged £20 no refund on a subwoofer repair. They so called did a diagnosis and said it's fooked. I doubt they did and took my money

Nothing lost m8, it could have been just a blown cap or a dead power board. It's trained money stuff swapping bits out as the old saying goes in the building game "It's not a church"
 

silverdale

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#14
If it means more money I'll f##k it off but thanks anyway for the help. Like you said it's a learning curve.
I have another samsung 24" and got quote £50 + VAT for the repair from a local tv repair shop.
It was turning on then after a while off. I read up and it turned out to be a faulty relay. It cost me £10 for a new one and 1/2 hr to do.
Point been , if your confident enough to have a go then go for it. This tv could have been a simple fix but it's turning out be more than that and not worth spending any more on, eBay it goes for spares ,thanks segel
 
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silverdale

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#15
If still, you will need to source a backlight bulb for your TV model, but might as well get a strip, may find it easier. Wouldn't pay more then £20, at that point though mate, money wise, you would of been well over for that TV. Gets a strip and it still doesn't work... :shakeshead::shakeshead::shakeshead:

Learned something though :banana:
I've had a good look round and I couldn't find any details on the bulb. If it's a pound or two I'd solder a new one in that's if I can find out what type/size it is, here's a picture of the knackered bulb,
IMG_20161222_101532.jpg IMG_20161222_105359.jpg IMG_20161222_101600.jpg
 
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silverdale

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#16
I am going to have a bash at converting the backlight from a CCFL to an LED purely as a hobby come learning curve job so I will post up any pictures along the way.

Any help or pointers to any online kits or video online guides would be helpful, I dont mind waiting for lights so China is fine. I'm always fascinated if I can fix something or not. It doesn't always pay off but not long back I changed the whole tub and bearings in a £800 washer/dryer. I was quoted £300 to repair I got the tub from eBay for £40 and it took a day to do.

If you want to help feel free to ad

There are 12 CCFL bulbs in all. I don't want to strip it fully down as I don't have anywhere to leave it open but I measured the length and my guestimation is the CCFL will be in and around 700m in length.

So my next question is , once I lose the inverter how will the LED's draw power ?
 
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chookey

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#18
You would need to strip the screen to install it but there are easier and cheaper ways of starting a fire.
Televisions are designed to comply with safety standards against the risk of electrocution but especially fire. What you are considering could potentially put your home and family at risk.

Is it really worth it?
 

silverdale

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#19
You would need to strip the screen to install it but there are easier and cheaper ways of starting a fire.
Televisions are designed to comply with safety standards against the risk of electrocution but especially fire. What you are considering could potentially put your home and family at risk.

Is it really worth it?
Im not having a go here but you earlier said for a tenner more a shop would have had a look ?, doubt it it's £20 for the screws to come out then parts and labour.
TV repair shops are a thing of the past, I mean, how many of you have took a tv to a shop to be fixed ?.

Most just claim or take it back to the shop or under warranty send it back. One of the reasons is, we live in a throw away day and age were things are so cheap it's easier and convenient to just skim it rather than have it repaired and wait for it to be fixed which with my past experience can be from a few days to growing a full length beard.

And one of the other reasons they've gone to the wall is some of their charges say £30 change a cap :)

I'm a bricklayer and spent 4 years learning it as a kid. If someone said to me " How do I build a 6ft tall back garden retaining wall ?" I would tell him how and offer advise as much as I can without actually getting my hands dirty.

I wouldnt say "Ooooo, get a bricky in to do that, it might fall down and kill someone, there's health and safety rules to follow".

Thanks for your advise but if I wasn't competent or I thought it would be a glorious f**k up I wouldn't tackle it, I shall make note of points if and when when the fire brigade turn up with the hoses. The Tinternet is a wonderful place to tackle such jobs and with no end of help just a keyboard away. I don't know if it's just me but you seem a tab bitter that Youtube has saved ppl millions on "How to repair a ......." as I said before , it aint a church :)
 
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IANB

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#20
You would need to strip the screen to install it but there are easier and cheaper ways of starting a fire.
Televisions are designed to comply with safety standards against the risk of electrocution but especially fire. What you are considering could potentially put your home and family at risk.

Is it really worth it?

You can lead a horse to water lol but like he said its not a church,
Sometimes folk can be a danger to themselves :( Good advice given @chookey
 
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