Samsung LE40R87BD LCD TV - relay clicking repeatedly but wont start

[Turnip]

Hi Daz,

The thought that 'clipboards' might be checking our activities for some sort of ability causes anal wind to develop.

Guess they would have, if they could, and given us Telly Bashers some silly name if they understood the technical nature of the job.

They never have, and probably can't - well  it's politics, and we don't give a shit - Mildly, as ever - Chris.

[udaydabke]

if you any tv service manual or circuit digram then contact dabkeradio@rediffmail.com

Hi all
Thought this was going to be an easy one, but after replacing the domed and split electrolytics on the 5 volt line (power board) I was left with exactly the same symptom - relay clicking continuously at about 10 second intervals but the set not starting. While the relay is energised all voltages marked on the psu output socket are present and correct. Suspect some damage further downstream on the signals panel, possibly a damaged regulator or corrupt eprom. Has anyone encountered this situation before, or does anyone have a service manual / schematics for this model. Any advice would be much appreciated.
Thanks
John.

[SubSonix]

Hi been trying this lots, and i can only get a blank picture and the back lights on. Have i killed the eeprom possibly? I got picture once but no sound so tried resetting again, no luck since:/

[sparky]

hi
looks like you have killed the poor eeprom,try changing
 it with a blank one it then sets itself up
dave

[SubSonix]

I'll order a few, and let you know the result.

[SubSonix]

I still haven't received my replacement eeprom, but I'm looking at the board now, and there is actually two 24c256's. The second one is at IC3202. Can someone please verify that this one isn't a possible fault too?

[GRAHAM RICHARDS]

Our workshop repairs approxametly 4 of these sets a week with the clicking relay or stuck in standby symtoms.
The cause is excess noise on the supply lines(in particular the 5v supply).The electrolytic decoupling
capacitors begin to suffer from electrolyte dry out,which increases there esr(electrical series resitance).This makes the casing expand.Because of the noise on the supply line,this in turn corrupts the memory ic(eeprom) in 90% of  sets.The cure! Replace the 3 or 4 (depends on psu version fitted) 1000mfd/10v capacitors(16v are better)110 degree.If it still has the clicking relay symtom(or it may work with odd symtoms)then the eeprom will
have to be replaced on the main pcb,its a 8 pin ic on the top right of the board,mounted on rear side(top left looking from behind the board).You have to fit a blank eeprom.Then refit panel & swich on,it will take 15-20 seconds for the flash memory to upload to the eeprom.The relay wiill click once or twice before the picture  appears.Im going to introduce a kit of parts with instuctions very soon.Watch this space!

[monstermonkey]

Well said john!
I love this site and always try to help where I can, but I do question the wisdom of encouraging Joe public to bugger around in the back of their TVs, not only from a health and safety point of view (sure someone will get sued sooner than later) but also from a financial point of view as I don’t know of an engineer making much money these days, decades of knowledge given away for free to Joe public is that wise ????
PLEASE DISCUS!

Not everyone who is 'Joe Public' doesn't understand or respect the dangerous nature of working on TV's or electronics in general.

I'm technically a 'Joe Public' as I don't repair TV's for a living, however, as an ex Electron Microscope engineer who has moved on to more lucrative pastures, I do fully appreciate the care needed when working with high voltages (400KV in a TEM anyone?)

The way I see it is if you have a 32" Samsung TV that's worth £150 second hand working, no one is going to spend £50 just to have it looked at when they can bang it on eBay and get £75 for it as faulty and then pick up a new set for around £250, this gets the faulty sets out in the public domain which undoubtedly leads to people picking them up and then looking for help on how to fix them.

Time goes on, things change - that's how life is, you have to adapt to keep on top of these changes - if more repair people did a no fix, no fee you'd get more business.

[sparky]

then people will live on thin air and disappear
or repairing tv's for free

[Turnip]

Hi Sparky,

Good thought, but as local chaps who mended tellies for a decent price had to get a real job some 20 years ago when folks wouldn't pay for their sharp suits and nice motors, I found it the biz to be in with friends in low places (I never had any real taste- you guessed)

I could be last TellyBasher in this Turkey Twizzling region - well, no-one else on Quuq talks real  'Norfolk'

'Bootiful' (last time - fairly honest) - Chris.

[nolan1985]

hi
ive been having the same problem as most people who unfotunately have a samsung tv.
ive shown in the pictures attached why capacitors i have replaced with a red cross on the top. i was told on a different forum to replace them with 1000uf 35v ones but it doesnt seem to have made much difference, should i use a different vault?
ive attached a picture of the full board too, as im not used to doing things like this i dont really know what everything on there is, if theres anything else on the board that could be wrong could someone who knows whats what please point it out to me and advise me on what parts exactly i should need, its been clicking on and off for a few weeks now and all the tv settings have been reseting when ever i turned it on until last week when the tv wouldnt switch on at all.
any help would be great
thanks
Adam

[Horatio]

Hi guys,

I'm really glad to have found all this really useful information on how to fix TV's!  It gave me the perfect excuse to go out and buy a new soldering iron.

My 2 1/2 year old Samsung 40" 1080p LCD TV decided to crap out on me on new years day, as pointed out to me by my boys at approximately 6am.  You can only imagine.

I decided to carry out the repair myself and armed with a list of capacitors, phoned my local Maplin store.  They assured me over the phone that they had the 'all the capacitors in the world' in stock.  My TV was carefully disassembled, the PSU board was removed and I drove the 60miles to go and get my 7 radial capacitors.

Sadly, they had no capacitors in the 105 degree range I needed, so I left fairly miserable, figuring that by the time I'd ordered components and had them delivered mail order, the TV would likely stay knackered until the weekend.

As a last resort, I phoned the Samsung care line, on the bank holiday Monday.  Imagine my surprise when they agreed for an engineer to phone me within 2 working days.  Tuesday morning, the service centre duly contacted me and a pair of engineers arrived on Thursday the 6th January (yesterday) and carried out a repair in the home before lunch.  It took approximately 10 minutes, and they simply replaced the entire board - for free.

On the receipt, they describe 'replacing 4 capacitors' in a range that my particular example doesn't actually have (4x16v 1000uf), but what the hell - my TV works now and it was done gratis.  The work is guaranteed for 3 months.

I'm vaguely annoyed that I didn't have the satisfaction of repairing it myself, but thanks to this site, if the PSU they supplied ever decides to spew all it's capacitors, I shall take great delight in soldering in quality items from RS.

My EEPROM had no issues at all, so I should imagine it's only the unlucky few amongst us that need to reset it.  It's also my understanding that should your EEPROM be corrupt, Samsung engineers will not be able to carry out the repair in the home.

[EDIT] Just thought I'd add, even though the work was being done for free outside of the warranty period, I didn't exactly want the Samsung engineers getting the impression that I'd taken the TV apart myself to inspect the PSU.  Just in case.  There's no point giving them an excuse not to carry out the work.

For that reason, I was very careful not to munch up the screws or give any indication that the TV had been 'tampered with'.  Ahem.  I even used a permanent black sharpie pen to make the screws look good as new -tee hee!

 

Samsung 0845 726 7864

[Turnip]

Hi Horatio,

Guess you might just read back threads - Yawn - Chris

[Horatio]

Turnip

I don't understand what you mean.  Please explain.

[Turnip]

Hi Horiatio,

Pleasure - this topic has been covered in Quuq for some while - just tap model into 'LCD Search' and you'll get tons of stuff - Chris.